Sha256: cb19b542764bf1c2938045f111c3b2116b01ce8338321895d0a0d0ffb8814329
Contents?: true
Size: 1.99 KB
Versions: 9
Compression:
Stored size: 1.99 KB
Contents
module ReactiveResource
module Association
# Represents and resolves a has_many association.
class HasManyAssociation
# The class this association is attached to
attr_reader :klass
# The attribute name this association represents
attr_reader :attribute
# additional options passed in when the association was created
attr_reader :options
# Returns the class name of the target of the association. Based
# off of +attribute+ unless +class_name+ was passed in the
# +options+ hash.
def associated_class
if options[:class_name]
options[:class_name].constantize
else
klass.relative_const_get(attribute.to_s.singularize.camelize)
end
end
# Called when this assocation is referenced. Finds and returns
# the targets of this association.
def resolve_relationship(object)
id_attribute = "#{klass.name.split("::").last.underscore}_id"
associated_class.find(:all, :params => object.prefix_options.merge(id_attribute => object.id))
end
# Adds methods for has_many associations, to make dealing with
# these objects a bit more straightforward. If the attribute name
# is +lawyers+, it will add:
#
# [lawyers] returns the associated lawyers
def add_helper_methods(klass, attribute)
association = self
klass.class_eval do
# lawyer.addresses
define_method(attribute) do
unless instance_variable_get("@#{attribute}")
object = association.resolve_relationship(self)
instance_variable_set("@#{attribute}", object)
end
instance_variable_get("@#{attribute}")
end
end
end
# Create a new has_many association.
def initialize(klass, attribute, options)
@klass = klass
@attribute = attribute
@options = options
add_helper_methods(klass, attribute)
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems