add index/collections/paging. overriding most of snorlax now |:)

app/controllers/api/v1/restful_controller.rb

@@ -7,7 +7,7 @@ module Api
       snorlax_used_rest!
 
       load_and_authorize_resource only: [:show, :update, :destroy]
-
+      
       def create
         instantiate_resource
         resource.user = current_user
@@ -34,6 +34,18 @@ module Api
         "Api::V1::#{resource_name.camelize}Serializer".constantize
       end
 
+      def respond_with_resource(scope: default_scope, serializer: resource_serializer, root: serializer_root)
+        if resource.errors.empty?
+          render json: resource, scope: scope, serializer: serializer, root: root
+        else
+          respond_with_errors
+        end
+      end
+
+      def respond_with_collection(resources: collection, scope: default_scope, serializer: resource_serializer, root: serializer_root)
+        render json: resources, scope: scope, each_serializer: serializer, root: root, meta: pagination(resources), meta_key: :page
+      end
+
       def default_scope
         {
           embeds: embeds
@@ -59,6 +71,40 @@ module Api
       def permitted_params
         @permitted_params ||= PermittedParams.new(params)
       end
+
+      def serializer_root
+        'data'
+      end
+
+      def pagination(collection)
+        per = (params[:per] || 25).to_i
+        current_page = params[:page].to_i
+        total_pages = (collection.total_count / per).to_i + 1
+        prev_page = current_page > 1 ? current_page - 1 : 0
+        next_page = current_page < total_pages ? current_page + 1 : 0
+        {
+          current_page: current_page,
+          next_page: next_page,
+          prev_page: prev_page,
+          total_pages: total_pages,
+          total_count: collection.total_count
+        }
+      end
+
+      def instantiate_collection
+        collection = accessible_records
+        collection = yield collection if block_given?
+        collection = collection.page(params[:page]).per(params[:per])
+        self.collection = collection
+      end
+
+      def visible_records
+        policy_scope(resource_class)
+      end
+
+      def public_records
+        policy_scope(resource_class)
+      end
     end
   end
 end

app/serializers/api/v1/embeddable.rb

@@ -0,0 +1,32 @@
+module Api
+  module V1
+    module Embeddable
+      def self.embeddable
+        {}
+      end
+
+      def embeds
+        @embeds ||= (scope[:embeds] || []).select { |e| self.class.embeddable.keys.include?(e) }
+      end
+
+      def self.inherited(child)
+        child.class_eval do
+          embeddable.each_pair do |key, opts|
+            attr = opts.delete(:attr) || key
+            binding.pry if key == :topic2
+            if attr.to_s.pluralize == attr.to_s
+              attribute "#{attr.to_s.singularize}_ids".to_sym, opts.merge(unless: -> { embeds.include?(key) }) do
+                object.send(attr).map(&:id)
+              end
+              has_many attr, opts.merge(if: -> { embeds.include?(key) })
+            else
+              id_opts = opts.merge(key: "#{key}_id")
+              attribute "#{attr}_id".to_sym, id_opts.merge(unless: -> { embeds.include?(key) })
+              attribute key, opts.merge(if: -> { embeds.include?(key) })
+            end
+          end
+        end
+      end
+    end
+  end
+end

config/initializers/active_model_serializers.rb

@@ -0,0 +1 @@
+ActiveModelSerializers.config.adapter = :json

config/initializers/kaminari_config.rb

@@ -0,0 +1,10 @@
+Kaminari.configure do |config|
+  # config.default_per_page = 25
+  # config.max_per_page = nil
+  # config.window = 4
+  # config.outer_window = 0
+  # config.left = 0
+  # config.right = 0
+  # config.page_method_name = :page
+  # config.param_name = :page
+end

config/routes.rb

@@ -11,10 +11,10 @@ Metamaps::Application.routes.draw do
 
   namespace :api, path: '/api', default: { format: :json } do
     namespace :v1, path: '/v1' do
-      resources :maps, only: [:create, :show, :update, :destroy]
-      resources :synapses, only: [:create, :show, :update, :destroy]
-      resources :topics, only: [:create, :show, :update, :destroy]
-      resources :mappings, only: [:create, :show, :update, :destroy]
+      resources :maps, only: [:index, :create, :show, :update, :destroy]
+      resources :synapses, only: [:index, :create, :show, :update, :destroy]
+      resources :topics, only: [:index, :create, :show, :update, :destroy]
+      resources :mappings, only: [:index, :create, :show, :update, :destroy]
       resources :tokens, only: [:create, :destroy] do
         get :my_tokens, on: :collection
       end