ditkrg/active_model_serializers
4
0
Fork 0
mirror of https://github.com/ditkrg/active_model_serializers.git synced 2026-01-22 22:06:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

Extract DSL methods (meta programming help)

Browse Source
This commit is contained in:
Benjamin Fleischer 2017-07-02 21:43:15 -05:00
parent 838388dc03
commit 9c1a9e18c4
2 changed files with 42 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
lib/ams/dsl_support.rb Normal file
View File

@ -0,0 +1,29 @@
# frozen_string_literal: true
module AMS
module DSLSupport
# @api private
# Macro to add an instance method to the receiver
def add_instance_method(body, receiver)
cl = caller_locations[0]
silence_warnings { receiver.module_eval body, cl.absolute_path, cl.lineno }
end
# @api private
# Macro to add a class method to the receiver
def add_class_method(body, receiver)
cl = caller_locations[0]
silence_warnings { receiver.class_eval body, cl.absolute_path, cl.lineno }
end
# @api private
# Silence warnings, primarily when redefining methods
def silence_warnings
original_verbose = $VERBOSE
$VERBOSE = nil
yield
ensure
$VERBOSE = original_verbose
end
end
end

47
lib/ams/serializer.rb
View File

@ -2,6 +2,7 @@
require "json"
require "ams/inflector"
require "ams/dsl_support"
module AMS
# Lightweight mapping of a model to a JSON API resource object
# with attributes and relationships
@ -31,6 +32,7 @@ module AMS
# ums = UserModelSerializer.new(user)
# ums.to_json
class Serializer < BasicObject
extend DSLSupport
# delegate constant lookup to Object
def self.const_missing(name)
::Object.const_get(name)
@ -40,30 +42,6 @@ module AMS
attr_accessor :_attributes, :_relations, :_id_field, :_type
attr_accessor :_fields, :_query_params
# @api private
# Macro to add an instance method to the receiver
def add_instance_method(body, receiver = self)
cl = caller_locations[0]
silence_warnings { receiver.module_eval body, cl.absolute_path, cl.lineno }
end
# @api private
# Macro to add a class method to the receiver
def add_class_method(body, receiver)
cl = caller_locations[0]
silence_warnings { receiver.class_eval body, cl.absolute_path, cl.lineno }
end
# @api private
# Silence warnings, primarily when redefining methods
def silence_warnings
original_verbose = $VERBOSE
$VERBOSE = nil
yield
ensure
$VERBOSE = original_verbose
end
# @!visibility private
def _infer_type(base)
Inflector.pluralize(
@ -101,7 +79,7 @@ module AMS
# id_field :user_id
def id_field(id_field)
self._id_field = id_field
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def id
object.#{id_field}
end
@ -121,7 +99,8 @@ module AMS
fail "ForbiddenKey" if attribute_name == :id
_fields << key
_attributes[attribute_name] = { key: key }
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def #{attribute_name}
object.#{attribute_name}
end
@ -197,22 +176,22 @@ module AMS
ids_method = options.fetch(:ids) do
"object.#{relation_name}.pluck(:id)"
end
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def related_#{relation_name}_ids
#{ids_method}
end
METHOD
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def related_#{relation_name}_data
related_#{relation_name}_ids.map { |id| relationship_data(id, "#{type}") }
end
METHOD
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def related_#{relation_name}_links
related_link_to_many("#{type}")
end
METHOD
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def #{relation_name}
{}.tap do |hash|
hash[:data] = related_#{relation_name}_data
@ -269,22 +248,22 @@ module AMS
id_method = options.fetch(:id) do
"object.#{relation_name}.id"
end
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def related_#{relation_name}_id
#{id_method}
end
METHOD
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def related_#{relation_name}_data
relationship_data(related_#{relation_name}_id, "#{type}")
end
METHOD
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def related_#{relation_name}_links
related_link_to_one(related_#{relation_name}_id, "#{type}")
end
METHOD
add_instance_method <<-METHOD
add_instance_method <<-METHOD, self
def #{relation_name}
{}.tap do |hash|
hash[:data] = related_#{relation_name}_data