1
0
Fork 0
mirror of https://github.com/rails/rails.git synced 2022-11-09 12:12:34 -05:00
rails--rails/actionview/lib/action_view/base.rb

206 lines
8.1 KiB
Ruby
Raw Normal View History

2009-05-13 04:10:37 -04:00
require 'active_support/core_ext/module/attr_internal'
2012-05-10 18:50:56 -04:00
require 'active_support/core_ext/class/attribute_accessors'
2010-06-12 16:10:59 -04:00
require 'active_support/ordered_options'
require 'action_view/log_subscriber'
2013-07-29 20:24:31 -04:00
require 'action_view/helpers'
require 'action_view/context'
require 'action_view/template'
require 'action_view/lookup_context'
2009-05-13 04:10:37 -04:00
module ActionView #:nodoc:
# = Action View Base
#
2013-01-01 16:52:15 -05:00
# Action View templates can be written in several ways. If the template file has a <tt>.erb</tt> extension then it uses a mixture of ERB
# (included in Ruby) and HTML. If the template file has a <tt>.builder</tt> extension then Jim Weirich's Builder::XmlMarkup library is used.
#
# == ERB
#
# You trigger ERB by using embeddings such as <% %>, <% -%>, and <%= %>. The <%= %> tag set is used when you want output. Consider the
# following loop for names:
#
# <b>Names of all the people</b>
2010-12-24 14:41:50 -05:00
# <% @people.each do |person| %>
# Name: <%= person.name %><br/>
# <% end %>
#
# The loop is setup in regular embedding tags <% %> and the name is written using the output embedding tag <%= %>. Note that this
# is not just a usage suggestion. Regular output functions like print or puts won't work with ERB templates. So this would be wrong:
#
2010-04-05 05:51:26 -04:00
# <%# WRONG %>
# Hi, Mr. <% puts "Frodo" %>
#
2010-04-05 05:51:26 -04:00
# If you absolutely must write from within a function use +concat+.
#
# <%- and -%> suppress leading and trailing whitespace, including the trailing newline, and can be used interchangeably with <% and %>.
#
# === Using sub templates
#
# Using sub templates allows you to sidestep tedious replication and extract common display structures in shared templates. The
# classic example is the use of a header and footer (even though the Action Pack-way would be to use Layouts):
#
# <%= render "shared/header" %>
# Something really specific and terrific
# <%= render "shared/footer" %>
#
# As you see, we use the output embeddings for the render methods. The render call itself will just return a string holding the
# result of the rendering. The output embedding writes it to the current template.
#
# But you don't have to restrict yourself to static includes. Templates can share variables amongst themselves by using instance
# variables defined using the regular embedding tags. Like this:
#
# <% @page_title = "A Wonderful Hello" %>
# <%= render "shared/header" %>
#
Merge docrails: commit e6afd8b2736364322b673bbdcca3e9b38b6d3da0 Author: Xavier Noria <fxn@hashref.com> Date: Thu May 8 23:49:36 2008 +0200 Overall documentation improvement and markup corrections. Zillion changes. commit 2fead68b3192332eee27945ed95a94a64ca73f70 Author: Austin Putman <austin@emmanuel.local> Date: Wed May 7 19:35:46 2008 -0700 Documented class methods on ActionController::Routing. These are dangerous, and mostly used for testing. commit f5b84182dbc39bea79c8ee319c688d00fa99f9d1 Author: Teflon Ted <github@rudiment.net> Date: Wed May 7 16:08:49 2008 -0400 Added explanation about errant inflections not being patched in the future in order to avoid breaking legacy applications. commit 370f4f51722cec49ace17093d29e9ce9e8f15cfb Author: Sunny Ripert <negatif@gmail.com> Date: Wed May 7 14:00:59 2008 +0200 Applied list conventions in AR::Base commit 5bd18429f09d44e75191bec42a6db04bd33f3030 Author: Sunny Ripert <negatif@gmail.com> Date: Wed May 7 13:53:35 2008 +0200 Renamed Options list to Attributes list whenever they weren't option hashes in AR::Base commit d912bd5672316454457ae83f6e9dda5197beeb6f Author: Yaroslav Markin <yaroslav@markin.net> Date: Wed May 7 13:50:28 2008 +0400 Add a filter_parameter_logging usage hint to generated ApplicationController. This may help to remind the developer to filter sensitive information from application logs. Closes #11578 commit b243de0db3c2605121e055079854af5090d06374 Author: Jack Danger Canty <git@6brand.com> Date: Tue May 6 23:39:47 2008 -0700 doc: disambiguating an example ActiveRecord class commit f81d771f0657ae8375b84a77a059812cce5d6fd9 Author: Jack Danger Canty <git@6brand.com> Date: Tue May 6 23:35:05 2008 -0700 doc: ActiveRecord::Reflection::AssociationReflection#through_reflection Added documentation demonstrating the use of #through_reflection for finding intervening reflection objects for HasManyThrough and HasOneThrough. commit ae6b46f00b5b8b2939c6b37ce3329c83de7e71db Author: Cheah Chu Yeow <chuyeow@gmail.com> Date: Wed May 7 13:47:41 2008 +0800 Document AttributeAssignmentError and MultiparameterAssignmentErrors. commit 8f463550b597db2156b67733f31aed13487fbc3a Author: John Barnette <jbarnette@gmail.com> Date: Tue May 6 22:46:44 2008 -0700 Killing/fixing a bunch of outdated language in the AR README. commit aca44bcd92ef783abdf484b58abdde6786db0f89 Author: Cheah Chu Yeow <chuyeow@gmail.com> Date: Wed May 7 13:34:52 2008 +0800 Make a note about ActiveResource::Timeouterror being raised when ARes calls timeout. commit 284a930a93fbee16e25d06392779dbf2f03e9e12 Author: Jonathan Dance <jd@wuputah.com> Date: Tue May 6 14:58:26 2008 -0400 improvements to the page caching docs commit 9482da621390c874da7c921c8bd6230caae7035a Author: Sunny Ripert <negatif@gmail.com> Date: Mon May 5 18:13:40 2008 +0200 validates_numericality_of() "integer" option really is "only_integer" commit e9afd6790a8f530528f6597a7f59bb283be754f6 Author: Sunny Ripert <negatif@gmail.com> Date: Mon May 5 12:11:59 2008 +0200 Harmonized hash notation in AR::Base commit 67ebf14a91ffd970b582be4ff2991d691a9cf3e1 Author: Sunny Ripert <negatif@gmail.com> Date: Mon May 5 12:06:19 2008 +0200 Turned options into rdoc-lists in AR::Base commit 0ec7c0a41d889d4e5382b9dff72f1aaba89bf297 Author: Marshall Huss <mwhuss@Macbook.local> Date: Sun May 4 23:21:33 2008 -0400 Added information of how to set element_name in the case the user has a name confliction with an existing model Signed-off-by: Pratik Naik <pratiknaik@gmail.com>
2008-05-09 05:38:02 -04:00
# Now the header can pick up on the <tt>@page_title</tt> variable and use it for outputting a title tag:
#
# <title><%= @page_title %></title>
#
# === Passing local variables to sub templates
#
# You can pass local variables to sub templates by using a hash with the variable names as keys and the objects as values:
#
2012-10-29 07:10:53 -04:00
# <%= render "shared/header", { headline: "Welcome", person: person } %>
#
Merge docrails: commit e6afd8b2736364322b673bbdcca3e9b38b6d3da0 Author: Xavier Noria <fxn@hashref.com> Date: Thu May 8 23:49:36 2008 +0200 Overall documentation improvement and markup corrections. Zillion changes. commit 2fead68b3192332eee27945ed95a94a64ca73f70 Author: Austin Putman <austin@emmanuel.local> Date: Wed May 7 19:35:46 2008 -0700 Documented class methods on ActionController::Routing. These are dangerous, and mostly used for testing. commit f5b84182dbc39bea79c8ee319c688d00fa99f9d1 Author: Teflon Ted <github@rudiment.net> Date: Wed May 7 16:08:49 2008 -0400 Added explanation about errant inflections not being patched in the future in order to avoid breaking legacy applications. commit 370f4f51722cec49ace17093d29e9ce9e8f15cfb Author: Sunny Ripert <negatif@gmail.com> Date: Wed May 7 14:00:59 2008 +0200 Applied list conventions in AR::Base commit 5bd18429f09d44e75191bec42a6db04bd33f3030 Author: Sunny Ripert <negatif@gmail.com> Date: Wed May 7 13:53:35 2008 +0200 Renamed Options list to Attributes list whenever they weren't option hashes in AR::Base commit d912bd5672316454457ae83f6e9dda5197beeb6f Author: Yaroslav Markin <yaroslav@markin.net> Date: Wed May 7 13:50:28 2008 +0400 Add a filter_parameter_logging usage hint to generated ApplicationController. This may help to remind the developer to filter sensitive information from application logs. Closes #11578 commit b243de0db3c2605121e055079854af5090d06374 Author: Jack Danger Canty <git@6brand.com> Date: Tue May 6 23:39:47 2008 -0700 doc: disambiguating an example ActiveRecord class commit f81d771f0657ae8375b84a77a059812cce5d6fd9 Author: Jack Danger Canty <git@6brand.com> Date: Tue May 6 23:35:05 2008 -0700 doc: ActiveRecord::Reflection::AssociationReflection#through_reflection Added documentation demonstrating the use of #through_reflection for finding intervening reflection objects for HasManyThrough and HasOneThrough. commit ae6b46f00b5b8b2939c6b37ce3329c83de7e71db Author: Cheah Chu Yeow <chuyeow@gmail.com> Date: Wed May 7 13:47:41 2008 +0800 Document AttributeAssignmentError and MultiparameterAssignmentErrors. commit 8f463550b597db2156b67733f31aed13487fbc3a Author: John Barnette <jbarnette@gmail.com> Date: Tue May 6 22:46:44 2008 -0700 Killing/fixing a bunch of outdated language in the AR README. commit aca44bcd92ef783abdf484b58abdde6786db0f89 Author: Cheah Chu Yeow <chuyeow@gmail.com> Date: Wed May 7 13:34:52 2008 +0800 Make a note about ActiveResource::Timeouterror being raised when ARes calls timeout. commit 284a930a93fbee16e25d06392779dbf2f03e9e12 Author: Jonathan Dance <jd@wuputah.com> Date: Tue May 6 14:58:26 2008 -0400 improvements to the page caching docs commit 9482da621390c874da7c921c8bd6230caae7035a Author: Sunny Ripert <negatif@gmail.com> Date: Mon May 5 18:13:40 2008 +0200 validates_numericality_of() "integer" option really is "only_integer" commit e9afd6790a8f530528f6597a7f59bb283be754f6 Author: Sunny Ripert <negatif@gmail.com> Date: Mon May 5 12:11:59 2008 +0200 Harmonized hash notation in AR::Base commit 67ebf14a91ffd970b582be4ff2991d691a9cf3e1 Author: Sunny Ripert <negatif@gmail.com> Date: Mon May 5 12:06:19 2008 +0200 Turned options into rdoc-lists in AR::Base commit 0ec7c0a41d889d4e5382b9dff72f1aaba89bf297 Author: Marshall Huss <mwhuss@Macbook.local> Date: Sun May 4 23:21:33 2008 -0400 Added information of how to set element_name in the case the user has a name confliction with an existing model Signed-off-by: Pratik Naik <pratiknaik@gmail.com>
2008-05-09 05:38:02 -04:00
# These can now be accessed in <tt>shared/header</tt> with:
#
# Headline: <%= headline %>
# First name: <%= person.first_name %>
#
# If you need to find out whether a certain local variable has been assigned a value in a particular render call,
# you need to use the following pattern:
#
# <% if local_assigns.has_key? :headline %>
# Headline: <%= headline %>
# <% end %>
#
# Testing using <tt>defined? headline</tt> will not work. This is an implementation restriction.
#
# === Template caching
#
# By default, Rails will compile each template to a method in order to render it. When you alter a template,
# Rails will check the file's modification time and recompile it in development mode.
#
# == Builder
#
# Builder templates are a more programmatic alternative to ERB. They are especially useful for generating XML content. An XmlMarkup object
# named +xml+ is automatically made available to templates with a <tt>.builder</tt> extension.
#
# Here are some basic examples:
#
2011-05-10 19:55:31 -04:00
# xml.em("emphasized") # => <em>emphasized</em>
# xml.em { xml.b("emph & bold") } # => <em><b>emph &amp; bold</b></em>
# xml.a("A Link", "href" => "http://onestepback.org") # => <a href="http://onestepback.org">A Link</a>
# xml.target("name" => "compile", "option" => "fast") # => <target option="fast" name="compile"\>
# # NOTE: order of attributes is not specified.
#
# Any method with a block will be treated as an XML markup tag with nested markup in the block. For example, the following:
#
2011-12-05 16:11:20 -05:00
# xml.div do
# xml.h1(@person.name)
# xml.p(@person.bio)
2011-12-05 16:11:20 -05:00
# end
#
# would produce something like:
#
# <div>
# <h1>David Heinemeier Hansson</h1>
# <p>A product of Danish Design during the Winter of '79...</p>
# </div>
#
# A full-length RSS example actually used on Basecamp:
#
# xml.rss("version" => "2.0", "xmlns:dc" => "http://purl.org/dc/elements/1.1/") do
# xml.channel do
# xml.title(@feed_title)
# xml.link(@url)
# xml.description "Basecamp: Recent items"
# xml.language "en-us"
# xml.ttl "40"
#
# @recent_items.each do |item|
# xml.item do
# xml.title(item_title(item))
# xml.description(item_description(item)) if item_description(item)
# xml.pubDate(item_pubDate(item))
# xml.guid(@person.firm.account.url + @recent_items.url(item))
# xml.link(@person.firm.account.url + @recent_items.url(item))
#
# xml.tag!("dc:creator", item.author_name) if item_has_creator?(item)
# end
# end
# end
# end
#
# More builder documentation can be found at http://builder.rubyforge.org.
class Base
include Helpers, ::ERB::Util, Context
# Specify the proc used to decorate input tags that refer to attributes with errors.
cattr_accessor :field_error_proc
@@field_error_proc = Proc.new{ |html_tag, instance| "<div class=\"field_with_errors\">#{html_tag}</div>".html_safe }
# How to complete the streaming when an exception occurs.
# This is our best guess: first try to close the attribute, then the tag.
cattr_accessor :streaming_completion_on_exception
@@streaming_completion_on_exception = %("><script>window.location = "/500.html"</script></html>)
# Specify whether rendering within namespaced controllers should prefix
# the partial paths for ActiveModel objects with the namespace.
# (e.g., an Admin::PostsController would render @post using /admin/posts/_post.erb)
cattr_accessor :prefix_partial_path_with_controller_namespace
@@prefix_partial_path_with_controller_namespace = true
# Specify default_formats that can be rendered.
cattr_accessor :default_formats
class_attribute :_routes
2012-01-18 12:05:36 -05:00
class_attribute :logger
class << self
delegate :erb_trim_mode=, :to => 'ActionView::Template::Handlers::ERB'
def cache_template_loading
ActionView::Resolver.caching?
end
def cache_template_loading=(value)
ActionView::Resolver.caching = value
end
2011-05-04 06:04:29 -04:00
def xss_safe? #:nodoc:
true
end
end
attr_accessor :view_renderer
2011-05-04 06:04:29 -04:00
attr_internal :config, :assigns
delegate :lookup_context, :to => :view_renderer
delegate :formats, :formats=, :locale, :locale=, :view_paths, :view_paths=, :to => :lookup_context
def assign(new_assigns) # :nodoc:
@_assigns = new_assigns.each { |key, value| instance_variable_set("@#{key}", value) }
end
2011-05-04 06:04:29 -04:00
def initialize(context = nil, assigns = {}, controller = nil, formats = nil) #:nodoc:
@_config = ActiveSupport::InheritableOptions.new
if context.is_a?(ActionView::Renderer)
@view_renderer = context
2012-04-03 13:45:19 -04:00
else
lookup_context = context.is_a?(ActionView::LookupContext) ?
context : ActionView::LookupContext.new(context)
lookup_context.formats = formats if formats
lookup_context.prefixes = controller._prefixes if controller
@view_renderer = ActionView::Renderer.new(lookup_context)
end
2011-05-04 06:04:29 -04:00
assign(assigns)
assign_controller(controller)
_prepare_context
end
ActiveSupport.run_load_hooks(:action_view, self)
end
end