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b55f59e811
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@910 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
641 lines
29 KiB
Ruby
Executable file
641 lines
29 KiB
Ruby
Executable file
module ActiveRecord
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# Active Record validation is reported to and from this object, which is used by Base#save to
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# determine whether the object in a valid state to be saved. See usage example in Validations.
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class Errors
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def initialize(base) # :nodoc:
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@base, @errors = base, {}
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end
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@@default_error_messages = {
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:inclusion => "is not included in the list",
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:invalid => "is invalid",
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:confirmation => "doesn't match confirmation",
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:accepted => "must be accepted",
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:empty => "can't be empty",
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:too_long => "is too long (max is %d characters)",
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:too_short => "is too short (min is %d characters)",
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:wrong_length => "is the wrong length (should be %d characters)",
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:taken => "has already been taken",
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:not_a_number => "is not a number",
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}
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# Holds a hash with all the default error messages, such that they can be replaced by your own copy or localizations.
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cattr_accessor :default_error_messages
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# Adds an error to the base object instead of any particular attribute. This is used
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# to report errors that doesn't tie to any specific attribute, but rather to the object
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# as a whole. These error messages doesn't get prepended with any field name when iterating
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# with each_full, so they should be complete sentences.
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def add_to_base(msg)
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add(:base, msg)
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end
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# Adds an error message (+msg+) to the +attribute+, which will be returned on a call to <tt>on(attribute)</tt>
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# for the same attribute and ensure that this error object returns false when asked if <tt>empty?</tt>. More than one
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# error can be added to the same +attribute+ in which case an array will be returned on a call to <tt>on(attribute)</tt>.
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# If no +msg+ is supplied, "invalid" is assumed.
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def add(attribute, msg = @@default_error_messages[:invalid])
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@errors[attribute.to_s] = [] if @errors[attribute.to_s].nil?
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@errors[attribute.to_s] << msg
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end
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# Will add an error message to each of the attributes in +attributes+ that is empty (defined by <tt>attribute_present?</tt>).
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def add_on_empty(attributes, msg = @@default_error_messages[:empty])
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for attr in [attributes].flatten
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value = @base.respond_to?(attr.to_s) ? @base.send(attr.to_s) : @base[attr.to_s]
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is_empty = value.respond_to?("empty?") ? value.empty? : false
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add(attr, msg) unless !value.nil? && !is_empty
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end
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end
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# Will add an error message to each of the attributes in +attributes+ that has a length outside of the passed boundary +range+.
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# If the length is above the boundary, the too_long_msg message will be used. If below, the too_short_msg.
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def add_on_boundary_breaking(attributes, range, too_long_msg = @@default_error_messages[:too_long], too_short_msg = @@default_error_messages[:too_short])
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for attr in [attributes].flatten
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value = @base.respond_to?(attr.to_s) ? @base.send(attr.to_s) : @base[attr.to_s]
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add(attr, too_short_msg % range.begin) if value && value.length < range.begin
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add(attr, too_long_msg % range.end) if value && value.length > range.end
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end
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end
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alias :add_on_boundry_breaking :add_on_boundary_breaking
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# Returns true if the specified +attribute+ has errors associated with it.
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def invalid?(attribute)
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!@errors[attribute.to_s].nil?
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end
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# * Returns nil, if no errors are associated with the specified +attribute+.
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# * Returns the error message, if one error is associated with the specified +attribute+.
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# * Returns an array of error messages, if more than one error is associated with the specified +attribute+.
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def on(attribute)
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if @errors[attribute.to_s].nil?
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nil
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elsif @errors[attribute.to_s].length == 1
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@errors[attribute.to_s].first
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else
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@errors[attribute.to_s]
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end
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end
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alias :[] :on
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# Returns errors assigned to base object through add_to_base according to the normal rules of on(attribute).
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def on_base
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on(:base)
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end
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# Yields each attribute and associated message per error added.
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def each
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@errors.each_key { |attr| @errors[attr].each { |msg| yield attr, msg } }
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end
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# Yields each full error message added. So Person.errors.add("first_name", "can't be empty") will be returned
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# through iteration as "First name can't be empty".
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def each_full
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full_messages.each { |msg| yield msg }
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end
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# Returns all the full error messages in an array.
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def full_messages
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full_messages = []
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@errors.each_key do |attr|
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@errors[attr].each do |msg|
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next if msg.nil?
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if attr == "base"
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full_messages << msg
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else
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full_messages << @base.class.human_attribute_name(attr) + " " + msg
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end
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end
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end
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return full_messages
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end
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# Returns true if no errors have been added.
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def empty?
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return @errors.empty?
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end
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# Removes all the errors that have been added.
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def clear
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@errors = {}
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end
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# Returns the total number of errors added. Two errors added to the same attribute will be counted as such
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# with this as well.
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def count
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error_count = 0
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@errors.each_value { |attribute| error_count += attribute.length }
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error_count
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end
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end
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# Active Records implement validation by overwriting Base#validate (or the variations, +validate_on_create+ and
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# +validate_on_update+). Each of these methods can inspect the state of the object, which usually means ensuring
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# that a number of attributes have a certain value (such as not empty, within a given range, matching a certain regular expression).
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#
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# Example:
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#
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# class Person < ActiveRecord::Base
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# protected
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# def validate
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# errors.add_on_empty %w( first_name last_name )
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# errors.add("phone_number", "has invalid format") unless phone_number =~ /[0-9]*/
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# end
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#
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# def validate_on_create # is only run the first time a new object is saved
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# unless valid_discount?(membership_discount)
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# errors.add("membership_discount", "has expired")
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# end
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# end
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#
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# def validate_on_update
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# errors.add_to_base("No changes have occurred") if unchanged_attributes?
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# end
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# end
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#
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# person = Person.new("first_name" => "David", "phone_number" => "what?")
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# person.save # => false (and doesn't do the save)
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# person.errors.empty? # => false
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# person.count # => 2
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# person.errors.on "last_name" # => "can't be empty"
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# person.errors.on "phone_number" # => "has invalid format"
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# person.each_full { |msg| puts msg } # => "Last name can't be empty\n" +
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# "Phone number has invalid format"
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#
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# person.attributes = { "last_name" => "Heinemeier", "phone_number" => "555-555" }
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# person.save # => true (and person is now saved in the database)
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#
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# An +Errors+ object is automatically created for every Active Record.
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#
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# Please do have a look at ActiveRecord::Validations::ClassMethods for a higher level of validations.
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module Validations
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VALIDATIONS = %w( validate validate_on_create validate_on_update )
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def self.append_features(base) # :nodoc:
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super
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base.extend ClassMethods
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base.class_eval do
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alias_method :save_without_validation, :save
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alias_method :save, :save_with_validation
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alias_method :update_attribute_without_validation_skipping, :update_attribute
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alias_method :update_attribute, :update_attribute_with_validation_skipping
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end
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end
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# All of the following validations are defined in the class scope of the model that you're interested in validating.
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# They offer a more declarative way of specifying when the model is valid and when it is not. It is recommended to use
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# these over the low-level calls to validate and validate_on_create when possible.
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module ClassMethods
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DEFAULT_VALIDATION_OPTIONS = {
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:on => :save,
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:allow_nil => false,
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:message => nil
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}.freeze
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DEFAULT_SIZE_VALIDATION_OPTIONS = DEFAULT_VALIDATION_OPTIONS.merge(
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:too_long => ActiveRecord::Errors.default_error_messages[:too_long],
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:too_short => ActiveRecord::Errors.default_error_messages[:too_short],
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:wrong_length => ActiveRecord::Errors.default_error_messages[:wrong_length]
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).freeze
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ALL_RANGE_OPTIONS = [ :is, :within, :in, :minimum, :maximum ].freeze
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def validate(*methods, &block)
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methods << block if block_given?
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write_inheritable_set(:validate, methods)
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end
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def validate_on_create(*methods, &block)
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methods << block if block_given?
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write_inheritable_set(:validate_on_create, methods)
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end
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def validate_on_update(*methods, &block)
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methods << block if block_given?
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write_inheritable_set(:validate_on_update, methods)
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end
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# Validates each attribute against a block.
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#
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# class Person < ActiveRecord::Base
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# validates_each :first_name, :last_name do |record, attr|
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# record.errors.add attr, 'starts with z.' if attr[0] == ?z
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# end
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# end
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#
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# Options:
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# * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
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# * <tt>allow_nil</tt> - Skip validation if attribute is nil.
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def validates_each(*attrs)
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options = attrs.last.is_a?(Hash) ? attrs.pop.symbolize_keys : {}
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attrs = attrs.flatten
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# Declare the validation.
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send(validation_method(options[:on] || :save)) do |record|
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attrs.each do |attr|
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value = record.send(attr)
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next if value.nil? && options[:allow_nil]
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yield record, attr, value
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end
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end
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end
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# Encapsulates the pattern of wanting to validate a password or email address field with a confirmation. Example:
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#
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# Model:
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# class Person < ActiveRecord::Base
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# validates_confirmation_of :user_name, :password
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# validates_confirmation_of :email_address, :message => "should match confirmation"
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# end
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#
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# View:
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# <%= password_field "person", "password" %>
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# <%= password_field "person", "password_confirmation" %>
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#
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# The person has to already have a password attribute (a column in the people table), but the password_confirmation is virtual.
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# It exists only as an in-memory variable for validating the password. This check is performed only if password_confirmation
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# is not nil and by default on save.
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#
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# Configuration options:
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# * <tt>message</tt> - A custom error message (default is: "doesn't match confirmation")
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# * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
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def validates_confirmation_of(*attr_names)
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configuration = { :message => ActiveRecord::Errors.default_error_messages[:confirmation], :on => :save }
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configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
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attr_accessor *(attr_names.map { |n| "#{n}_confirmation" })
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validates_each(attr_names, configuration) do |record, attr_name, value|
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record.errors.add(attr_name, configuration[:message]) unless record.send("#{attr_name}_confirmation").nil? or value == record.send("#{attr_name}_confirmation")
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end
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end
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# Encapsulates the pattern of wanting to validate the acceptance of a terms of service check box (or similar agreement). Example:
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#
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# class Person < ActiveRecord::Base
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# validates_acceptance_of :terms_of_service
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# validates_acceptance_of :eula, :message => "must be abided"
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# end
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#
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# The terms_of_service attribute is entirely virtual. No database column is needed. This check is performed only if
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# terms_of_service is not nil and by default on save.
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#
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# Configuration options:
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# * <tt>message</tt> - A custom error message (default is: "can't be empty")
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# * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
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#
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# NOTE: The agreement is considered valid if it's set to the string "1". This makes it easy to relate it to an HTML checkbox.
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def validates_acceptance_of(*attr_names)
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configuration = { :message => ActiveRecord::Errors.default_error_messages[:accepted], :on => :save, :allow_nil => true }
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configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
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attr_accessor *attr_names
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validates_each(attr_names,configuration) do |record, attr_name, value|
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record.errors.add(attr_name, configuration[:message]) unless value == "1"
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end
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end
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# Validates that the specified attributes are neither nil nor empty. Happens by default on save.
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#
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# Configuration options:
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# * <tt>message</tt> - A custom error message (default is: "has already been taken")
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# * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
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def validates_presence_of(*attr_names)
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configuration = { :message => ActiveRecord::Errors.default_error_messages[:empty], :on => :save }
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configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
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# can't use validates_each here, because it cannot cope with non-existant attributes,
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# while errors.add_on_empty can
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attr_names.each do |attr_name|
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send(validation_method(configuration[:on])) do |record|
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record.errors.add_on_empty(attr_name,configuration[:message])
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end
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end
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end
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# Validates that the specified attribute matches the length restrictions supplied. Only one option can be used at a time:
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#
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# class Person < ActiveRecord::Base
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# validates_length_of :first_name, :maximum=>30
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# validates_length_of :last_name, :maximum=>30, :message=>"less than %d if you don't mind"
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# validates_length_of :fax, :in => 7..32, :allow_nil => true
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# validates_length_of :user_name, :within => 6..20, :too_long => "pick a shorter name", :too_short => "pick a longer name"
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# validates_length_of :fav_bra_size, :minimum=>1, :too_short=>"please enter at least %d character"
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# validates_length_of :smurf_leader, :is=>4, :message=>"papa is spelled with %d characters... don't play me."
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# end
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#
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# Configuration options:
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# * <tt>minimum</tt> - The minimum size of the attribute
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# * <tt>maximum</tt> - The maximum size of the attribute
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# * <tt>is</tt> - The exact size of the attribute
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# * <tt>within</tt> - A range specifying the minimum and maximum size of the attribute
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# * <tt>in</tt> - A synonym(or alias) for :within
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# * <tt>allow_nil</tt> - Attribute may be nil; skip validation.
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#
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# * <tt>too_long</tt> - The error message if the attribute goes over the maximum (default is: "is too long (max is %d characters)")
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# * <tt>too_short</tt> - The error message if the attribute goes under the minimum (default is: "is too short (min is %d characters)")
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# * <tt>wrong_length</tt> - The error message if using the :is method and the attribute is the wrong size (default is: "is the wrong length (should be %d characters)")
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# * <tt>message</tt> - The error message to use for a :minimum, :maximum, or :is violation. An alias of the appropriate too_long/too_short/wrong_length message
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# * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
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def validates_length_of(*attrs)
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# Merge given options with defaults.
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options = DEFAULT_SIZE_VALIDATION_OPTIONS.dup
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options.update(attrs.pop.symbolize_keys) if attrs.last.is_a?(Hash)
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# Ensure that one and only one range option is specified.
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range_options = ALL_RANGE_OPTIONS & options.keys
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case range_options.size
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when 0
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raise ArgumentError, 'Range unspecified. Specify the :within, :maximum, :minimum, or :is option.'
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when 1
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# Valid number of options; do nothing.
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else
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raise ArgumentError, 'Too many range options specified. Choose only one.'
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end
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# Get range option and value.
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option = range_options.first
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option_value = options[range_options.first]
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# Declare different validations per option.
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case range_options.first
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when :within, :in
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raise ArgumentError, ':within must be a Range' unless option_value.is_a?(Range)
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validates_each(attrs, options) do |record, attr|
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next if record.send(attr).nil? and options[:allow_nil]
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record.errors.add_on_boundary_breaking(attr, option_value, options[:too_long], options[:too_short])
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end
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when :is
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raise ArgumentError, ':is must be a nonnegative Integer' unless option_value.is_a?(Integer) and option_value >= 0
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message = options[:message] || options[:wrong_length]
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message = (message % option_value) rescue message
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validates_each(attrs, options) do |record, attr, value|
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record.errors.add(attr, message) if value.nil? or value.size != option_value
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end
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when :minimum
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raise ArgumentError, ':minimum must be a nonnegative Integer' unless option_value.is_a?(Integer) and option_value >= 0
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message = options[:message] || options[:too_short]
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message = (message % option_value) rescue message
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validates_each(attrs, options) do |record, attr, value|
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record.errors.add(attr, message) if value.nil? or value.size < option_value
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end
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when :maximum
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raise ArgumentError, ':maximum must be a nonnegative Integer' unless option_value.is_a?(Integer) and option_value >= 0
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message = options[:message] || options[:too_long]
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message = (message % option_value) rescue message
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validates_each(attrs, options) do |record, attr, value|
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record.errors.add(attr, message) if value.nil? or value.size > option_value
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end
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end
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end
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alias_method :validates_size_of, :validates_length_of
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# Validates whether the value of the specified attributes are unique across the system. Useful for making sure that only one user
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# can be named "davidhh".
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#
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# class Person < ActiveRecord::Base
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# validates_uniqueness_of :user_name, :scope => "account_id"
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# end
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#
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# When the record is created, a check is performed to make sure that no record exist in the database with the given value for the specified
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# attribute (that maps to a column). When the record is updated, the same check is made but disregarding the record itself.
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#
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# Configuration options:
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# * <tt>message</tt> - Specifies a custom error message (default is: "has already been taken")
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# * <tt>scope</tt> - Ensures that the uniqueness is restricted to a condition of "scope = record.scope"
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def validates_uniqueness_of(*attr_names)
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configuration = { :message => ActiveRecord::Errors.default_error_messages[:taken] }
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configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
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if scope = configuration[:scope]
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validates_each(attr_names,configuration) do |record, attr_name, value|
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record.errors.add(attr_name, configuration[:message]) if record.class.find_first(record.new_record? ? ["#{attr_name} = ? AND #{scope} = ?", record.send(attr_name), record.send(scope)] : ["#{attr_name} = ? AND #{record.class.primary_key} <> ? AND #{scope} = ?", record.send(attr_name), record.send(:id), record.send(scope)])
|
|
end
|
|
else
|
|
validates_each(attr_names,configuration) do |record, attr_name, value|
|
|
record.errors.add(attr_name, configuration[:message]) if record.class.find_first(record.new_record? ? ["#{attr_name} = ?", record.send(attr_name)] : ["#{attr_name} = ? AND #{record.class.primary_key} <> ?", record.send(attr_name), record.send(:id) ] )
|
|
end
|
|
end
|
|
end
|
|
|
|
# Validates whether the value of the specified attribute is of the correct form by matching it against the regular expression
|
|
# provided.
|
|
#
|
|
# class Person < ActiveRecord::Base
|
|
# validates_format_of :email, :with => /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/, :on => :create
|
|
# end
|
|
#
|
|
# A regular expression must be provided or else an exception will be raised.
|
|
#
|
|
# Configuration options:
|
|
# * <tt>message</tt> - A custom error message (default is: "is invalid")
|
|
# * <tt>with</tt> - The regular expression used to validate the format with (note: must be supplied!)
|
|
# * <tt>on</tt> Specifies when this validation is active (default is :save, other options :create, :update)
|
|
def validates_format_of(*attr_names)
|
|
configuration = { :message => ActiveRecord::Errors.default_error_messages[:invalid], :on => :save, :with => nil }
|
|
configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
|
|
|
|
raise(ArgumentError, "A regular expression must be supplied as the :with option of the configuration hash") unless configuration[:with].is_a?(Regexp)
|
|
|
|
validates_each(attr_names, configuration) do |record, attr_name, value|
|
|
record.errors.add(attr_name, configuration[:message]) unless value.to_s =~ configuration[:with]
|
|
end
|
|
end
|
|
|
|
# Validates whether the value of the specified attribute is available in a particular enumerable object.
|
|
#
|
|
# class Person < ActiveRecord::Base
|
|
# validates_inclusion_of :gender, :in=>%w( m f ), :message=>"woah! what are you then!??!!"
|
|
# validates_inclusion_of :age, :in=>0..99
|
|
# end
|
|
#
|
|
# Configuration options:
|
|
# * <tt>in</tt> - An enumerable object of available items
|
|
# * <tt>message</tt> - Specifies a customer error message (default is: "is not included in the list")
|
|
# * <tt>allow_nil</tt> - If set to true, skips this validation if the attribute is null (default is: false)
|
|
def validates_inclusion_of(*attr_names)
|
|
configuration = { :message => ActiveRecord::Errors.default_error_messages[:inclusion], :on => :save }
|
|
configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
|
|
|
|
enum = configuration[:in] || configuration[:within]
|
|
|
|
raise(ArgumentError, "An object with the method include? is required must be supplied as the :in option of the configuration hash") unless enum.respond_to?("include?")
|
|
|
|
validates_each(attr_names, configuration) do |record, attr_name, value|
|
|
record.errors.add(attr_name, configuration[:message]) unless enum.include?(value)
|
|
end
|
|
end
|
|
|
|
# Validates whether the associated object or objects are all themselves valid. Works with any kind of association.
|
|
#
|
|
# class Book < ActiveRecord::Base
|
|
# has_many :pages
|
|
# belongs_to :library
|
|
#
|
|
# validates_associated :pages, :library
|
|
# end
|
|
#
|
|
# Warning: If, after the above definition, you then wrote:
|
|
#
|
|
# class Page < ActiveRecord::Base
|
|
# belongs_to :book
|
|
#
|
|
# validates_associated :book
|
|
# end
|
|
#
|
|
# this would specify a circular dependency and cause infinite recursion. The Rails team recommends against this practice.
|
|
#
|
|
# Configuration options:
|
|
# * <tt>on</tt> Specifies when this validation is active (default is :save, other options :create, :update)
|
|
def validates_associated(*attr_names)
|
|
configuration = { :message => ActiveRecord::Errors.default_error_messages[:invalid], :on => :save }
|
|
configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
|
|
|
|
validates_each(attr_names, configuration) do |record, attr_name, value|
|
|
record.errors.add(attr_name, configuration[:message]) unless
|
|
(value.is_a?(Array) ? value : [value]).inject(true) { |memo, r| (r.nil? or r.valid?) and memo }
|
|
end
|
|
end
|
|
|
|
# Validates whether the value of the specified attribute is numeric by trying to convert it to
|
|
# a float with Kernel.Float (if <tt>integer</tt> is false) or applying it to the regular expression
|
|
# <tt>/^[\+\-]?\d+$/</tt> (if <tt>integer</tt> is set to true).
|
|
#
|
|
# class Person < ActiveRecord::Base
|
|
# validates_numericality_of :value, :on => :create
|
|
# end
|
|
#
|
|
# Configuration options:
|
|
# * <tt>message</tt> - A custom error message (default is: "is not a number")
|
|
# * <tt>on</tt> Specifies when this validation is active (default is :save, other options :create, :update)
|
|
# * <tt>only_integer</tt> Specifies whether the value has to be an integer, e.g. an integral value (default is false)
|
|
# * <tt>allow_nil</tt> Skip validation if attribute is nil (default is false). Notice that for fixnum and float columsn empty strings are converted to nil
|
|
def validates_numericality_of(*attr_names)
|
|
configuration = { :message => ActiveRecord::Errors.default_error_messages[:not_a_number], :on => :save,
|
|
:only_integer => false, :allow_nil => false }
|
|
configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
|
|
|
|
if configuration[:only_integer]
|
|
validates_each(attr_names,configuration) do |record, attr_name,value|
|
|
record.errors.add(attr_name, configuration[:message]) unless record.send("#{attr_name}_before_type_cast").to_s =~ /^[+-]?\d+$/
|
|
end
|
|
else
|
|
validates_each(attr_names,configuration) do |record, attr_name,value|
|
|
begin
|
|
Kernel.Float(record.send("#{attr_name}_before_type_cast").to_s)
|
|
rescue ArgumentError, TypeError
|
|
record.errors.add(attr_name, configuration[:message])
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
def write_inheritable_set(key, methods)
|
|
existing_methods = read_inheritable_attribute(key) || []
|
|
write_inheritable_attribute(key, methods | existing_methods)
|
|
end
|
|
|
|
def validation_method(on)
|
|
case on
|
|
when :save then :validate
|
|
when :create then :validate_on_create
|
|
when :update then :validate_on_update
|
|
end
|
|
end
|
|
end
|
|
|
|
# The validation process on save can be skipped by passing false. The regular Base#save method is
|
|
# replaced with this when the validations module is mixed in, which it is by default.
|
|
def save_with_validation(perform_validation = true)
|
|
if perform_validation && valid? || !perform_validation then save_without_validation else false end
|
|
end
|
|
|
|
# Updates a single attribute and saves the record without going through the normal validation procedure.
|
|
# This is especially useful for boolean flags on existing records. The regular +update_attribute+ method
|
|
# in Base is replaced with this when the validations module is mixed in, which it is by default.
|
|
def update_attribute_with_validation_skipping(name, value)
|
|
self[name] = value
|
|
save(false)
|
|
end
|
|
|
|
# Runs validate and validate_on_create or validate_on_update and returns true if no errors were added otherwise false.
|
|
def valid?
|
|
errors.clear
|
|
|
|
run_validations(:validate)
|
|
validate
|
|
|
|
if new_record?
|
|
run_validations(:validate_on_create)
|
|
validate_on_create
|
|
else
|
|
run_validations(:validate_on_update)
|
|
validate_on_update
|
|
end
|
|
|
|
errors.empty?
|
|
end
|
|
|
|
# Returns the Errors object that holds all information about attribute error messages.
|
|
def errors
|
|
@errors = Errors.new(self) if @errors.nil?
|
|
@errors
|
|
end
|
|
|
|
protected
|
|
# Overwrite this method for validation checks on all saves and use Errors.add(field, msg) for invalid attributes.
|
|
def validate #:doc:
|
|
end
|
|
|
|
# Overwrite this method for validation checks used only on creation.
|
|
def validate_on_create #:doc:
|
|
end
|
|
|
|
# Overwrite this method for validation checks used only on updates.
|
|
def validate_on_update # :doc:
|
|
end
|
|
|
|
private
|
|
def run_validations(validation_method)
|
|
validations = self.class.read_inheritable_attribute(validation_method.to_sym)
|
|
if validations.nil? then return end
|
|
validations.each do |validation|
|
|
if validation.is_a?(Symbol)
|
|
self.send(validation)
|
|
elsif validation.is_a?(String)
|
|
eval(validation, binding)
|
|
elsif validation_block?(validation)
|
|
validation.call(self)
|
|
elsif validation_class?(validation, validation_method)
|
|
validation.send(validation_method, self)
|
|
else
|
|
raise(
|
|
ActiveRecordError,
|
|
"Validations need to be either a symbol, string (to be eval'ed), proc/method, or " +
|
|
"class implementing a static validation method"
|
|
)
|
|
end
|
|
end
|
|
end
|
|
|
|
def validation_block?(validation)
|
|
validation.respond_to?("call") && (validation.arity == 1 || validation.arity == -1)
|
|
end
|
|
|
|
def validation_class?(validation, validation_method)
|
|
validation.respond_to?(validation_method)
|
|
end
|
|
end
|
|
end
|