ActiveModel::Serializers Gem - Versioned API Namespacing Issue

active-model-serializers, ruby, ruby-on-rails

Solution

be aware that namespaces should match the folder structure:

# should be in app/controllers/api/v1/posts_controller.rb
module Api
  module V1
   class PostsController < ApiController

# should be in app/serializers/post_serializer.rb
class PostSerializer < ActiveModel::Serializer

when using `PostSerializer` without a prefix, the current namespace is assumed. if you are referencing the global namespace use `::PostSerializer`

Problem

I'm new to Rails and Modules/Namespaces My Controller is namespaced like this: ``` module Api module V1 class PostsController < ApiController ``` And ActiveModel::Serializers put a "Serializers" folder in my app folder, and in it, I've created post_serializer.rb containing the following code: ``` class PostSerializer < ActiveModel::Serializer attributes :id, :body, :category, end ``` When I try to access the JSON response I get: ``` NameError at /api/v1/posts uninitialized constant Api::V1::PostsController::PostSerializer ``` What is the problem here and what is the best way to Namespace my Serializers alongside my API versions?

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