upgrade hash syntax

Gemfile

@@ -3,4 +3,4 @@ source 'https://rubygems.org'
 # Specify gem dependencies in active_model_serializers.gemspec
 gemspec
 
-gem "coveralls", :require => false
+gem "coveralls", require: false

Rakefile

@@ -15,4 +15,4 @@ task :bench do
   load 'bench/perf.rb' 
 end
 
-task :default => :test
+task default: :test

lib/active_model/array_serializer.rb

@@ -52,7 +52,7 @@ module ActiveModel
         end
         serializer ||= DefaultSerializer
 
-        serializable = serializer.new(item, options.merge(:root => nil))
+        serializable = serializer.new(item, options.merge(root: nil))
 
         if serializable.respond_to?(:serializable_hash)
           serializable.serializable_hash

lib/active_model/serializer.rb

@@ -13,7 +13,7 @@ module ActiveModel
   # it expects two objects as arguments, a resource and options. For example,
   # one may do in a controller:
   #
-  #     PostSerializer.new(@post, :scope => current_user).to_json
+  #     PostSerializer.new(@post, scope: current_user).to_json
   #
   # The object to be serialized is the +@post+ and the current user is passed
   # in for authorization purposes.
@@ -30,7 +30,7 @@ module ActiveModel
   #
   #       def attributes
   #         hash = super
-  #         hash.merge!(:email => post.email) if author?
+  #         hash.merge!(email: post.email) if author?
   #         hash
   #       end
   #
@@ -46,7 +46,7 @@ module ActiveModel
     include ActiveModel::Serializer::Caching
 
     INCLUDE_METHODS = {}
-    INSTRUMENT = { :serialize => :"serialize.serializer", :associations => :"associations.serializer" }
+    INSTRUMENT = { serialize: :"serialize.serializer", associations: :"associations.serializer" }
 
     class IncludeError < StandardError
       attr_reader :source, :association
@@ -86,7 +86,7 @@ module ActiveModel
 
         attrs.each do |attr|
           if Hash === attr
-            attr.each {|attr_real, key| attribute attr_real, :key => key }
+            attr.each {|attr_real, key| attribute(attr_real, key: key) }
           else
             attribute attr
           end
@@ -172,20 +172,20 @@ module ActiveModel
       #
       # The +attributes+ hash looks like this:
       #
-      #     { :name => :string, :age => :integer }
+      #     { name: :string, age: :integer }
       #
       # The +associations+ hash looks like this:
-      #     { :posts => { :has_many => :posts } }
+      #     { posts: { has_many: :posts } }
       #
       # If :key is used:
       #
       #     class PostsSerializer < ActiveModel::Serializer
-      #       has_many :posts, :key => :my_posts
+      #       has_many :posts, key: :my_posts
       #     end
       #
       # the hash looks like this:
       #
-      #     { :my_posts => { :has_many => :posts }
+      #     { my_posts: { has_many: :posts }
       #
       # This information is extracted from the serializer's model class,
       # which is provided by +SerializerClass.model_class+.
@@ -232,7 +232,7 @@ module ActiveModel
           end
         end
 
-        { :attributes => attrs, :associations => associations }
+        { attributes: attrs, associations: associations }
       end
 
       # The model class associated with this serializer.
@@ -244,7 +244,7 @@ module ActiveModel
       #
       #   embed :objects               # Embed associations as full objects
       #   embed :ids                   # Embed only the association ids
-      #   embed :ids, :include => true # Embed the association ids and include objects in the root
+      #   embed :ids, include: true    # Embed the association ids and include objects in the root
       #
       def embed(type, options={})
         self._embed = type
@@ -323,7 +323,7 @@ module ActiveModel
     # Returns a json representation of the serializable
     # object including the root.
     def as_json(args={})
-      super(:root => args.fetch(:root, options.fetch(:root, root_name)))
+      super(root: args.fetch(:root, options.fetch(:root, root_name)))
     end
 
     def serialize_object
@@ -451,8 +451,8 @@ module ActiveModel
 
     def default_embed_options
       {
-        :embed   => _embed,
-        :include => _root_embed
+        embed: _embed,
+        include: _root_embed
       }
     end
   end

lib/active_model/serializer/associations.rb

@@ -12,7 +12,7 @@ module ActiveModel
       #   embed: Define how associations should be embedded.
       #      - :objects                 # Embed associations as full objects.
       #      - :ids                     # Embed only the association ids.
-      #      - :ids, :include => true   # Embed the association ids and include objects in the root.
+      #      - :ids, include: true      # Embed the association ids and include objects in the root.
       #
       #   include: Used in conjunction with embed :ids. Includes the objects in the root.
       #
@@ -158,8 +158,8 @@ module ActiveModel
 
             if polymorphic?
               {
-                :type => polymorphic_key,
-                :id => id
+                type: polymorphic_key,
+                id: id
               }
             else
               id

lib/active_model_serializers.rb

@@ -74,8 +74,8 @@ Array.send(:include, ActiveModel::ArraySerializerSupport)
 Set.send(:include, ActiveModel::ArraySerializerSupport)
 
 {
-  :active_record => 'ActiveRecord::Relation',
-  :mongoid => 'Mongoid::Criteria'
+  active_record: 'ActiveRecord::Relation',
+  mongoid: 'Mongoid::Criteria'
 }.each do |orm, rel_class|
   ActiveSupport.on_load(orm) do
     include ActiveModel::SerializerSupport

lib/generators/serializer/serializer_generator.rb

@@ -2,11 +2,11 @@ module Rails
   module Generators
     class SerializerGenerator < NamedBase
       source_root File.expand_path("../templates", __FILE__)
-      check_class_collision :suffix => "Serializer"
+      check_class_collision suffix: "Serializer"
 
-      argument :attributes, :type => :array, :default => [], :banner => "field:type field:type"
+      argument :attributes, type: :array, default: [], banner: "field:type field:type"
 
-      class_option :parent, :type => :string, :desc => "The parent class for the generated serializer"
+      class_option :parent, type: :string, desc: "The parent class for the generated serializer"
 
       def create_serializer_file
         template 'serializer.rb', File.join('app/serializers', class_path, "#{file_name}_serializer.rb")