mirror of
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3e0cdbeaf4
* require, require_relative, load by double quotes We're getting rid of all single quote usage, unless it serves a specific purpose, as per the general style guide.
773 lines
24 KiB
Ruby
773 lines
24 KiB
Ruby
# frozen_string_literal: true
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require "erb"
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require "yaml"
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require "zlib"
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require "set"
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require "active_support/dependencies"
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require "active_support/core_ext/digest/uuid"
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require "active_record/fixture_set/file"
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require "active_record/fixture_set/render_context"
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require "active_record/fixture_set/table_rows"
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require "active_record/test_fixtures"
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module ActiveRecord
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class FixtureClassNotFound < ActiveRecord::ActiveRecordError #:nodoc:
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end
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# \Fixtures are a way of organizing data that you want to test against; in short, sample data.
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#
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# They are stored in YAML files, one file per model, which are placed in the directory
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# appointed by <tt>ActiveSupport::TestCase.fixture_path=(path)</tt> (this is automatically
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# configured for Rails, so you can just put your files in <tt><your-rails-app>/test/fixtures/</tt>).
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# The fixture file ends with the +.yml+ file extension, for example:
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# <tt><your-rails-app>/test/fixtures/web_sites.yml</tt>).
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#
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# The format of a fixture file looks like this:
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#
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# rubyonrails:
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# id: 1
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# name: Ruby on Rails
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# url: http://www.rubyonrails.org
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#
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# google:
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# id: 2
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# name: Google
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# url: http://www.google.com
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#
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# This fixture file includes two fixtures. Each YAML fixture (ie. record) is given a name and
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# is followed by an indented list of key/value pairs in the "key: value" format. Records are
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# separated by a blank line for your viewing pleasure.
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#
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# Note: Fixtures are unordered. If you want ordered fixtures, use the omap YAML type.
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# See https://yaml.org/type/omap.html
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# for the specification. You will need ordered fixtures when you have foreign key constraints
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# on keys in the same table. This is commonly needed for tree structures. Example:
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#
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# --- !omap
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# - parent:
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# id: 1
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# parent_id: NULL
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# title: Parent
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# - child:
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# id: 2
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# parent_id: 1
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# title: Child
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#
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# = Using Fixtures in Test Cases
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#
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# Since fixtures are a testing construct, we use them in our unit and functional tests. There
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# are two ways to use the fixtures, but first let's take a look at a sample unit test:
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#
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# require "test_helper"
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#
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# class WebSiteTest < ActiveSupport::TestCase
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# test "web_site_count" do
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# assert_equal 2, WebSite.count
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# end
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# end
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#
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# By default, +test_helper.rb+ will load all of your fixtures into your test
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# database, so this test will succeed.
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#
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# The testing environment will automatically load all the fixtures into the database before each
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# test. To ensure consistent data, the environment deletes the fixtures before running the load.
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#
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# In addition to being available in the database, the fixture's data may also be accessed by
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# using a special dynamic method, which has the same name as the model.
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#
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# Passing in a fixture name to this dynamic method returns the fixture matching this name:
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#
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# test "find one" do
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# assert_equal "Ruby on Rails", web_sites(:rubyonrails).name
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# end
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#
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# Passing in multiple fixture names returns all fixtures matching these names:
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#
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# test "find all by name" do
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# assert_equal 2, web_sites(:rubyonrails, :google).length
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# end
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#
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# Passing in no arguments returns all fixtures:
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#
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# test "find all" do
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# assert_equal 2, web_sites.length
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# end
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#
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# Passing in any fixture name that does not exist will raise <tt>StandardError</tt>:
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#
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# test "find by name that does not exist" do
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# assert_raise(StandardError) { web_sites(:reddit) }
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# end
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#
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# Alternatively, you may enable auto-instantiation of the fixture data. For instance, take the
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# following tests:
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#
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# test "find_alt_method_1" do
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# assert_equal "Ruby on Rails", @web_sites['rubyonrails']['name']
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# end
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#
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# test "find_alt_method_2" do
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# assert_equal "Ruby on Rails", @rubyonrails.name
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# end
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#
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# In order to use these methods to access fixtured data within your test cases, you must specify one of the
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# following in your ActiveSupport::TestCase-derived class:
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#
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# - to fully enable instantiated fixtures (enable alternate methods #1 and #2 above)
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# self.use_instantiated_fixtures = true
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#
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# - create only the hash for the fixtures, do not 'find' each instance (enable alternate method #1 only)
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# self.use_instantiated_fixtures = :no_instances
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#
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# Using either of these alternate methods incurs a performance hit, as the fixtured data must be fully
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# traversed in the database to create the fixture hash and/or instance variables. This is expensive for
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# large sets of fixtured data.
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#
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# = Dynamic fixtures with ERB
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#
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# Sometimes you don't care about the content of the fixtures as much as you care about the volume.
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# In these cases, you can mix ERB in with your YAML fixtures to create a bunch of fixtures for load
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# testing, like:
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#
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# <% 1.upto(1000) do |i| %>
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# fix_<%= i %>:
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# id: <%= i %>
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# name: guy_<%= i %>
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# <% end %>
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#
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# This will create 1000 very simple fixtures.
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#
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# Using ERB, you can also inject dynamic values into your fixtures with inserts like
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# <tt><%= Date.today.strftime("%Y-%m-%d") %></tt>.
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# This is however a feature to be used with some caution. The point of fixtures are that they're
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# stable units of predictable sample data. If you feel that you need to inject dynamic values, then
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# perhaps you should reexamine whether your application is properly testable. Hence, dynamic values
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# in fixtures are to be considered a code smell.
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#
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# Helper methods defined in a fixture will not be available in other fixtures, to prevent against
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# unwanted inter-test dependencies. Methods used by multiple fixtures should be defined in a module
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# that is included in ActiveRecord::FixtureSet.context_class.
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#
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# - define a helper method in <tt>test_helper.rb</tt>
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# module FixtureFileHelpers
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# def file_sha(path)
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# Digest::SHA2.hexdigest(File.read(Rails.root.join('test/fixtures', path)))
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# end
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# end
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# ActiveRecord::FixtureSet.context_class.include FixtureFileHelpers
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#
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# - use the helper method in a fixture
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# photo:
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# name: kitten.png
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# sha: <%= file_sha 'files/kitten.png' %>
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#
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# = Transactional Tests
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#
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# Test cases can use begin+rollback to isolate their changes to the database instead of having to
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# delete+insert for every test case.
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#
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# class FooTest < ActiveSupport::TestCase
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# self.use_transactional_tests = true
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#
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# test "godzilla" do
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# assert_not_empty Foo.all
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# Foo.destroy_all
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# assert_empty Foo.all
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# end
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#
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# test "godzilla aftermath" do
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# assert_not_empty Foo.all
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# end
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# end
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#
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# If you preload your test database with all fixture data (probably by running `bin/rails db:fixtures:load`)
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# and use transactional tests, then you may omit all fixtures declarations in your test cases since
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# all the data's already there and every case rolls back its changes.
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#
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# In order to use instantiated fixtures with preloaded data, set +self.pre_loaded_fixtures+ to
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# true. This will provide access to fixture data for every table that has been loaded through
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# fixtures (depending on the value of +use_instantiated_fixtures+).
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#
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# When *not* to use transactional tests:
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#
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# 1. You're testing whether a transaction works correctly. Nested transactions don't commit until
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# all parent transactions commit, particularly, the fixtures transaction which is begun in setup
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# and rolled back in teardown. Thus, you won't be able to verify
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# the results of your transaction until Active Record supports nested transactions or savepoints (in progress).
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# 2. Your database does not support transactions. Every Active Record database supports transactions except MySQL MyISAM.
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# Use InnoDB, MaxDB, or NDB instead.
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#
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# = Advanced Fixtures
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#
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# Fixtures that don't specify an ID get some extra features:
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#
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# * Stable, autogenerated IDs
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# * Label references for associations (belongs_to, has_one, has_many)
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# * HABTM associations as inline lists
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#
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# There are some more advanced features available even if the id is specified:
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#
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# * Autofilled timestamp columns
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# * Fixture label interpolation
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# * Support for YAML defaults
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#
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# == Stable, Autogenerated IDs
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#
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# Here, have a monkey fixture:
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#
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# george:
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# id: 1
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# name: George the Monkey
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#
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# reginald:
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# id: 2
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# name: Reginald the Pirate
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#
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# Each of these fixtures has two unique identifiers: one for the database
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# and one for the humans. Why don't we generate the primary key instead?
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# Hashing each fixture's label yields a consistent ID:
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#
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# george: # generated id: 503576764
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# name: George the Monkey
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#
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# reginald: # generated id: 324201669
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# name: Reginald the Pirate
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#
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# Active Record looks at the fixture's model class, discovers the correct
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# primary key, and generates it right before inserting the fixture
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# into the database.
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#
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# The generated ID for a given label is constant, so we can discover
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# any fixture's ID without loading anything, as long as we know the label.
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#
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# == Label references for associations (belongs_to, has_one, has_many)
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#
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# Specifying foreign keys in fixtures can be very fragile, not to
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# mention difficult to read. Since Active Record can figure out the ID of
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# any fixture from its label, you can specify FK's by label instead of ID.
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#
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# === belongs_to
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#
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# Let's break out some more monkeys and pirates.
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#
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# ### in pirates.yml
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#
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# reginald:
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# id: 1
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# name: Reginald the Pirate
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# monkey_id: 1
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#
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# ### in monkeys.yml
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#
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# george:
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# id: 1
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# name: George the Monkey
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# pirate_id: 1
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#
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# Add a few more monkeys and pirates and break this into multiple files,
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# and it gets pretty hard to keep track of what's going on. Let's
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# use labels instead of IDs:
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#
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# ### in pirates.yml
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#
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# reginald:
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# name: Reginald the Pirate
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# monkey: george
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#
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# ### in monkeys.yml
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#
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# george:
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# name: George the Monkey
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# pirate: reginald
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#
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# Pow! All is made clear. Active Record reflects on the fixture's model class,
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# finds all the +belongs_to+ associations, and allows you to specify
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# a target *label* for the *association* (monkey: george) rather than
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# a target *id* for the *FK* (<tt>monkey_id: 1</tt>).
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#
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# ==== Polymorphic belongs_to
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#
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# Supporting polymorphic relationships is a little bit more complicated, since
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# Active Record needs to know what type your association is pointing at. Something
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# like this should look familiar:
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#
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# ### in fruit.rb
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#
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# belongs_to :eater, polymorphic: true
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#
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# ### in fruits.yml
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#
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# apple:
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# id: 1
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# name: apple
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# eater_id: 1
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# eater_type: Monkey
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#
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# Can we do better? You bet!
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#
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# apple:
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# eater: george (Monkey)
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#
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# Just provide the polymorphic target type and Active Record will take care of the rest.
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#
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# === has_and_belongs_to_many
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#
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# Time to give our monkey some fruit.
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#
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# ### in monkeys.yml
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#
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# george:
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# id: 1
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# name: George the Monkey
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#
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# ### in fruits.yml
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#
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# apple:
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# id: 1
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# name: apple
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#
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# orange:
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# id: 2
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# name: orange
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#
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# grape:
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# id: 3
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# name: grape
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#
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# ### in fruits_monkeys.yml
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#
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# apple_george:
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# fruit_id: 1
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# monkey_id: 1
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#
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# orange_george:
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# fruit_id: 2
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# monkey_id: 1
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#
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# grape_george:
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# fruit_id: 3
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# monkey_id: 1
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#
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# Let's make the HABTM fixture go away.
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#
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# ### in monkeys.yml
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#
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# george:
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# id: 1
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# name: George the Monkey
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# fruits: apple, orange, grape
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#
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# ### in fruits.yml
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#
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# apple:
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# name: apple
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#
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# orange:
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# name: orange
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#
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# grape:
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# name: grape
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#
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# Zap! No more fruits_monkeys.yml file. We've specified the list of fruits
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# on George's fixture, but we could've just as easily specified a list
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# of monkeys on each fruit. As with +belongs_to+, Active Record reflects on
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# the fixture's model class and discovers the +has_and_belongs_to_many+
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# associations.
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#
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# == Autofilled Timestamp Columns
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#
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# If your table/model specifies any of Active Record's
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# standard timestamp columns (+created_at+, +created_on+, +updated_at+, +updated_on+),
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# they will automatically be set to <tt>Time.now</tt>.
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#
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# If you've set specific values, they'll be left alone.
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#
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# == Fixture label interpolation
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#
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# The label of the current fixture is always available as a column value:
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#
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# geeksomnia:
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# name: Geeksomnia's Account
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# subdomain: $LABEL
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# email: $LABEL@email.com
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#
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# Also, sometimes (like when porting older join table fixtures) you'll need
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# to be able to get a hold of the identifier for a given label. ERB
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# to the rescue:
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#
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# george_reginald:
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# monkey_id: <%= ActiveRecord::FixtureSet.identify(:reginald) %>
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# pirate_id: <%= ActiveRecord::FixtureSet.identify(:george) %>
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#
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# == Support for YAML defaults
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#
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# You can set and reuse defaults in your fixtures YAML file.
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# This is the same technique used in the +database.yml+ file to specify
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# defaults:
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#
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# DEFAULTS: &DEFAULTS
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# created_on: <%= 3.weeks.ago.to_s(:db) %>
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#
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# first:
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# name: Smurf
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# <<: *DEFAULTS
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#
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# second:
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# name: Fraggle
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# <<: *DEFAULTS
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#
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# Any fixture labeled "DEFAULTS" is safely ignored.
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#
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# Besides using "DEFAULTS", you can also specify what fixtures will
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# be ignored by setting "ignore" in "_fixture" section.
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#
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# # users.yml
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# _fixture:
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# ignore:
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# - base
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# # or use "ignore: base" when there is only one fixture needs to be ignored.
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#
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# base: &base
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# admin: false
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# introduction: "This is a default description"
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#
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# admin:
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# <<: *base
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# admin: true
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#
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# visitor:
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# <<: *base
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#
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# In the above example, 'base' will be ignored when creating fixtures.
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# This can be used for common attributes inheriting.
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#
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# == Configure the fixture model class
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#
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# It's possible to set the fixture's model class directly in the YAML file.
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# This is helpful when fixtures are loaded outside tests and
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# +set_fixture_class+ is not available (e.g.
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# when running <tt>rails db:fixtures:load</tt>).
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#
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# _fixture:
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# model_class: User
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# david:
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# name: David
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#
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# Any fixtures labeled "_fixture" are safely ignored.
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class FixtureSet
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#--
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# An instance of FixtureSet is normally stored in a single YAML file and
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# possibly in a folder with the same name.
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#++
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MAX_ID = 2**30 - 1
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@@all_cached_fixtures = Hash.new { |h, k| h[k] = {} }
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cattr_accessor :all_loaded_fixtures, default: {}
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class ClassCache
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def initialize(class_names, config)
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@class_names = class_names.stringify_keys
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@config = config
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# Remove string values that aren't constants or subclasses of AR
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@class_names.delete_if do |klass_name, klass|
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!insert_class(@class_names, klass_name, klass)
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end
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end
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def [](fs_name)
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@class_names.fetch(fs_name) do
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klass = default_fixture_model(fs_name, @config).safe_constantize
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insert_class(@class_names, fs_name, klass)
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end
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end
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private
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def insert_class(class_names, name, klass)
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# We only want to deal with AR objects.
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if klass && klass < ActiveRecord::Base
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class_names[name] = klass
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else
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class_names[name] = nil
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end
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end
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def default_fixture_model(fs_name, config)
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ActiveRecord::FixtureSet.default_fixture_model_name(fs_name, config)
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end
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end
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class << self
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def default_fixture_model_name(fixture_set_name, config = ActiveRecord::Base) # :nodoc:
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config.pluralize_table_names ?
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fixture_set_name.singularize.camelize :
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fixture_set_name.camelize
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end
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def default_fixture_table_name(fixture_set_name, config = ActiveRecord::Base) # :nodoc:
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"#{ config.table_name_prefix }"\
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"#{ fixture_set_name.tr('/', '_') }"\
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"#{ config.table_name_suffix }".to_sym
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end
|
|
|
|
def reset_cache
|
|
@@all_cached_fixtures.clear
|
|
end
|
|
|
|
def cache_for_connection(connection)
|
|
@@all_cached_fixtures[connection]
|
|
end
|
|
|
|
def fixture_is_cached?(connection, table_name)
|
|
cache_for_connection(connection)[table_name]
|
|
end
|
|
|
|
def cached_fixtures(connection, keys_to_fetch = nil)
|
|
if keys_to_fetch
|
|
cache_for_connection(connection).values_at(*keys_to_fetch)
|
|
else
|
|
cache_for_connection(connection).values
|
|
end
|
|
end
|
|
|
|
def cache_fixtures(connection, fixtures_map)
|
|
cache_for_connection(connection).update(fixtures_map)
|
|
end
|
|
|
|
def instantiate_fixtures(object, fixture_set, load_instances = true)
|
|
return unless load_instances
|
|
fixture_set.each do |fixture_name, fixture|
|
|
object.instance_variable_set "@#{fixture_name}", fixture.find
|
|
rescue FixtureClassNotFound
|
|
nil
|
|
end
|
|
end
|
|
|
|
def instantiate_all_loaded_fixtures(object, load_instances = true)
|
|
all_loaded_fixtures.each_value do |fixture_set|
|
|
instantiate_fixtures(object, fixture_set, load_instances)
|
|
end
|
|
end
|
|
|
|
def create_fixtures(fixtures_directory, fixture_set_names, class_names = {}, config = ActiveRecord::Base, &block)
|
|
fixture_set_names = Array(fixture_set_names).map(&:to_s)
|
|
class_names = ClassCache.new class_names, config
|
|
|
|
# FIXME: Apparently JK uses this.
|
|
connection = block_given? ? block : lambda { ActiveRecord::Base.connection }
|
|
|
|
fixture_files_to_read = fixture_set_names.reject do |fs_name|
|
|
fixture_is_cached?(connection.call, fs_name)
|
|
end
|
|
|
|
if fixture_files_to_read.any?
|
|
fixtures_map = read_and_insert(
|
|
fixtures_directory,
|
|
fixture_files_to_read,
|
|
class_names,
|
|
connection,
|
|
)
|
|
cache_fixtures(connection.call, fixtures_map)
|
|
end
|
|
cached_fixtures(connection.call, fixture_set_names)
|
|
end
|
|
|
|
# Returns a consistent, platform-independent identifier for +label+.
|
|
# Integer identifiers are values less than 2^30. UUIDs are RFC 4122 version 5 SHA-1 hashes.
|
|
def identify(label, column_type = :integer)
|
|
if column_type == :uuid
|
|
Digest::UUID.uuid_v5(Digest::UUID::OID_NAMESPACE, label.to_s)
|
|
else
|
|
Zlib.crc32(label.to_s) % MAX_ID
|
|
end
|
|
end
|
|
|
|
# Superclass for the evaluation contexts used by ERB fixtures.
|
|
def context_class
|
|
@context_class ||= Class.new
|
|
end
|
|
|
|
private
|
|
def read_and_insert(fixtures_directory, fixture_files, class_names, connection) # :nodoc:
|
|
fixtures_map = {}
|
|
fixture_sets = fixture_files.map do |fixture_set_name|
|
|
klass = class_names[fixture_set_name]
|
|
fixtures_map[fixture_set_name] = new( # ActiveRecord::FixtureSet.new
|
|
nil,
|
|
fixture_set_name,
|
|
klass,
|
|
::File.join(fixtures_directory, fixture_set_name)
|
|
)
|
|
end
|
|
update_all_loaded_fixtures(fixtures_map)
|
|
|
|
insert(fixture_sets, connection)
|
|
|
|
fixtures_map
|
|
end
|
|
|
|
def insert(fixture_sets, connection) # :nodoc:
|
|
fixture_sets_by_connection = fixture_sets.group_by do |fixture_set|
|
|
if fixture_set.model_class
|
|
fixture_set.model_class.connection
|
|
else
|
|
connection.call
|
|
end
|
|
end
|
|
|
|
fixture_sets_by_connection.each do |conn, set|
|
|
table_rows_for_connection = Hash.new { |h, k| h[k] = [] }
|
|
|
|
set.each do |fixture_set|
|
|
fixture_set.table_rows.each do |table, rows|
|
|
table_rows_for_connection[table].unshift(*rows)
|
|
end
|
|
end
|
|
|
|
conn.insert_fixtures_set(table_rows_for_connection, table_rows_for_connection.keys)
|
|
|
|
# Cap primary key sequences to max(pk).
|
|
if conn.respond_to?(:reset_pk_sequence!)
|
|
set.each { |fs| conn.reset_pk_sequence!(fs.table_name) }
|
|
end
|
|
end
|
|
end
|
|
|
|
def update_all_loaded_fixtures(fixtures_map) # :nodoc:
|
|
all_loaded_fixtures.update(fixtures_map)
|
|
end
|
|
end
|
|
|
|
attr_reader :table_name, :name, :fixtures, :model_class, :ignored_fixtures, :config
|
|
|
|
def initialize(_, name, class_name, path, config = ActiveRecord::Base)
|
|
@name = name
|
|
@path = path
|
|
@config = config
|
|
|
|
self.model_class = class_name
|
|
|
|
@fixtures = read_fixture_files(path)
|
|
|
|
@table_name = model_class&.table_name || self.class.default_fixture_table_name(name, config)
|
|
end
|
|
|
|
def [](x)
|
|
fixtures[x]
|
|
end
|
|
|
|
def []=(k, v)
|
|
fixtures[k] = v
|
|
end
|
|
|
|
def each(&block)
|
|
fixtures.each(&block)
|
|
end
|
|
|
|
def size
|
|
fixtures.size
|
|
end
|
|
|
|
# Returns a hash of rows to be inserted. The key is the table, the value is
|
|
# a list of rows to insert to that table.
|
|
def table_rows
|
|
# allow specifying fixtures to be ignored by setting `ignore` in `_fixture` section
|
|
fixtures.except!(*ignored_fixtures)
|
|
|
|
TableRows.new(
|
|
table_name,
|
|
model_class: model_class,
|
|
fixtures: fixtures,
|
|
config: config,
|
|
).to_hash
|
|
end
|
|
|
|
private
|
|
def model_class=(class_name)
|
|
if class_name.is_a?(Class) # TODO: Should be an AR::Base type class, or any?
|
|
@model_class = class_name
|
|
else
|
|
@model_class = class_name.safe_constantize if class_name
|
|
end
|
|
end
|
|
|
|
def ignored_fixtures=(base)
|
|
@ignored_fixtures =
|
|
case base
|
|
when Array
|
|
base
|
|
when String
|
|
[base]
|
|
else
|
|
[]
|
|
end
|
|
|
|
@ignored_fixtures << "DEFAULTS" unless @ignored_fixtures.include?("DEFAULTS")
|
|
@ignored_fixtures.compact
|
|
end
|
|
|
|
# Loads the fixtures from the YAML file at +path+.
|
|
# If the file sets the +model_class+ and current instance value is not set,
|
|
# it uses the file value.
|
|
def read_fixture_files(path)
|
|
yaml_files = Dir["#{path}/{**,*}/*.yml"].select { |f|
|
|
::File.file?(f)
|
|
} + [yaml_file_path(path)]
|
|
|
|
yaml_files.each_with_object({}) do |file, fixtures|
|
|
FixtureSet::File.open(file) do |fh|
|
|
self.model_class ||= fh.model_class if fh.model_class
|
|
self.ignored_fixtures ||= fh.ignored_fixtures
|
|
fh.each do |fixture_name, row|
|
|
fixtures[fixture_name] = ActiveRecord::Fixture.new(row, model_class)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def yaml_file_path(path)
|
|
"#{path}.yml"
|
|
end
|
|
end
|
|
|
|
class Fixture #:nodoc:
|
|
include Enumerable
|
|
|
|
class FixtureError < StandardError #:nodoc:
|
|
end
|
|
|
|
class FormatError < FixtureError #:nodoc:
|
|
end
|
|
|
|
attr_reader :model_class, :fixture
|
|
|
|
def initialize(fixture, model_class)
|
|
@fixture = fixture
|
|
@model_class = model_class
|
|
end
|
|
|
|
def class_name
|
|
model_class.name if model_class
|
|
end
|
|
|
|
def each
|
|
fixture.each { |item| yield item }
|
|
end
|
|
|
|
def [](key)
|
|
fixture[key]
|
|
end
|
|
|
|
alias :to_hash :fixture
|
|
|
|
def find
|
|
raise FixtureClassNotFound, "No class attached to find." unless model_class
|
|
model_class.unscoped do
|
|
model_class.find(fixture[model_class.primary_key])
|
|
end
|
|
end
|
|
end
|
|
end
|