add new api

app/assets/javascripts/api/products.coffee

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+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/javascripts/products.coffee

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+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/stylesheets/api/products.scss

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+// Place all the styles related to the api/products controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/assets/stylesheets/products.scss

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+// Place all the styles related to the products controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/api/products_controller.rb

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+class Api::ProductsController < ApplicationController
+	skip_before_filter  :verify_authenticity_token
+
+	def index
+		session_token=params[:session_token]    
+		check_member= Member.authenticate_session_token(session_token)
+		if !check_member.nil?
+			categories =ProductCategory.all
+			arr_category=Array.new
+			categories.each do |cat|
+				str={:id => cat.id,:name => cat.name}
+            	arr_category.push(str)
+            end
+            @out=true,arr_category                                                                                                                                                                                                                                                                                                                                               
+		else
+			@out=false,"Sorry!Unauthorized user!" 
+		end
+	end
+end

app/helpers/api/products_helper.rb

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+module Api::ProductsHelper
+end

app/helpers/products_helper.rb

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+module ProductsHelper
+end

app/models/product_category.rb

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+class ProductCategory < ApplicationRecord
+	
+end

app/models/product_type.rb

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+class ProductType < ApplicationRecord
+end

app/views/api/products/index.json.jbuilder

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+if @out[0] == true
+ 	json.set! :status, @out[0]
+ 	json.set! :data, @out[1]
+else
+ 	json.set! :status, @out[0]
+	json.set! :message,@out[1]
+end

db/migrate/20170208065307_create_product_types.rb

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+class CreateProductTypes < ActiveRecord::Migration[5.0]
+  def change
+    create_table :product_types do |t|
+	    t.string    :name      
+    end
+  end
+end

db/migrate/20170208065316_create_product_categories.rb

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+class CreateProductCategories < ActiveRecord::Migration[5.0]
+  def change
+    create_table :product_categories do |t|
+    	 t.string     :name  
+    	 t.references :product_type
+    end
+  end
+end

test/controllers/api/products_controller_test.rb

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+require 'test_helper'
+
+class Api::ProductsControllerTest < ActionDispatch::IntegrationTest
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/controllers/products_controller_test.rb

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+require 'test_helper'
+
+class ProductsControllerTest < ActionDispatch::IntegrationTest
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/fixtures/product_categories.yml

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+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+# This model initially had no columns defined. If you add columns to the
+# model remove the '{}' from the fixture names and add the columns immediately
+# below each fixture, per the syntax in the comments below
+#
+one: {}
+# column: value
+#
+two: {}
+# column: value

test/fixtures/product_types.yml

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+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+# This model initially had no columns defined. If you add columns to the
+# model remove the '{}' from the fixture names and add the columns immediately
+# below each fixture, per the syntax in the comments below
+#
+one: {}
+# column: value
+#
+two: {}
+# column: value

test/models/product_category_test.rb

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+require 'test_helper'
+
+class ProductCategoryTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/models/product_type_test.rb

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+require 'test_helper'
+
+class ProductTypeTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end