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Versions: 47
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Contents
module Para
module AttributeField
class NestedManyField < AttributeField::HasManyField
include Para::Helpers::AttributesMappings
include Para::AttributeField::NestedField
register :nested_many, self
def parse_input(params, resource)
if (nested_attributes = params[nested_attributes_key])
nested_attributes.each do |index, attributes|
nested_resource = fetch_or_build_nested_resource_for(resource, index, attributes)
mappings = nested_model_mappings(attributes, nested_resource)
mappings.fields.each do |field|
field.parse_input(attributes, nested_resource)
end
params[nested_attributes_key][index] = attributes
end
else
super
end
end
private
# Force loading association and look for a resource matching the provided
# attributes. If no resource is found, one is created and a fake `id` is
# assigned to it to hack Rails' nested resources lookup from new
# attributes params.
#
# This is necessary to be able to provide a resource to the #parse_input
# method when called on the nested resources hash
#
def fetch_or_build_nested_resource_for(parent, index, attributes)
nested_resources = parent.association(name).load_target
if (id = attributes['id'].presence)
nested_resources.find { |res| res.id == id.to_i }
else
parent.association(name).build(attributes.slice('type')).tap do |resource|
attributes['id'] = "__#{ index }"
temporarily_extend_new_resource(resource, attributes)
end
end
end
end
end
end
Version data entries
47 entries across 47 versions & 1 rubygems