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Contents
module Para
module AttributeField
module NestedField
def nested_model_mappings(nested_attributes, resource)
model = if resource
resource.class
elsif (type = nested_attributes[:type]).present?
nested_attributes[:type].try(:constantize)
else
reflection.klass
end
mappings = attributes_mappings_for(nested_attributes)
AttributeFieldMappings.new(model, mappings: mappings)
end
def nested_attributes_key
@nested_attributes_key ||= :"#{ name }_attributes"
end
# This method extends the current resource so its #id method returns a
# fake id based on the given attributes, but immediately returns to its
# standard behavior of returning nil as soon as the `#assign_attributes`
# method is called.
#
# During nested attributes assignation, the id of the resource is used
# to assign it its nested params. When it is nil, a new resource is
# created, but since we already need our resource to be created at the
# time we parse the input params, we fake the presence of an id while the
# nested attributes assignation is running, and remove that behavior as
# soon as we don't need it anymore.
#
def temporarily_extend_new_resource(resource, attributes)
resource.instance_variable_set(:@_waiting_for_attributes_assignation, true)
resource.define_singleton_method(:assign_attributes) do |*args|
@_waiting_for_attributes_assignation = false
super(*args)
end
resource.define_singleton_method(:id) do
@_waiting_for_attributes_assignation ? attributes['id'] : read_attribute(:id)
end
end
end
end
end
Version data entries
47 entries across 47 versions & 1 rubygems