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module ActiveRecord::Associations::Builder
class Association #:nodoc:
class_attribute :valid_options
self.valid_options = [:class_name, :foreign_key, :select, :conditions, :include, :extend, :readonly, :validate, :references]
# Set by subclasses
class_attribute :macro
attr_reader :model, :name, :options, :reflection
def self.build(model, name, options)
new(model, name, options).build
end
def initialize(model, name, options)
@model, @name, @options = model, name, options
end
def mixin
@model.generated_feature_methods
end
def build
validate_options
reflection = model.create_reflection(self.class.macro, name, options, model)
define_accessors
reflection
end
private
def validate_options
options.assert_valid_keys(self.class.valid_options)
end
def define_accessors
define_readers
define_writers
end
def define_readers
name = self.name
mixin.redefine_method(name) do |*params|
association(name).reader(*params)
end
end
def define_writers
name = self.name
mixin.redefine_method("#{name}=") do |value|
association(name).writer(value)
end
end
def dependent_restrict_raises?
ActiveRecord::Base.dependent_restrict_raises == true
end
def dependent_restrict_deprecation_warning
if dependent_restrict_raises?
msg = "In the next release, `:dependent => :restrict` will not raise a `DeleteRestrictionError`."\
"Instead, it will add an error on the model. To fix this warning, make sure your code" \
"isn't relying on a `DeleteRestrictionError` and then add" \
"`config.active_record.dependent_restrict_raises = false` to your application config."
ActiveSupport::Deprecation.warn msg
end
end
def define_restrict_dependency_method
name = self.name
mixin.redefine_method(dependency_method_name) do
# has_many or has_one associations
if send(name).respond_to?(:exists?) ? send(name).exists? : !send(name).nil?
if dependent_restrict_raises?
raise ActiveRecord::DeleteRestrictionError.new(name)
else
errors.add(:base, :restrict_dependent_destroy, :model => name.to_s.singularize)
return false
end
end
end
end
end
end
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