NoMethodError (undefined method `build' for #)

Question

I use angularjs and InheritedResources gem in my new rails project. I want use association in this project. I find Singletons for association with InheritedResources. I create 2 model and complete them like below:

districts_controller.rb:

class DistrictsController < InheritedResources::Base
  respond_to :json

  def district_params
    params.require(:district).permit(:name)
  end
end

calculations_controller.rb:

class CalculationsController < InheritedResources::Base
  respond_to :json
  singleton_belongs_to :district
  def calculation_params
    params.require(:calculation).permit(:district_id, :price)
  end
end

and have a model.js in my angularjs code that create url and post data to rails application:

model.js:

'use strict';

var app = angular.module('app');
app.factory('District', ['$resource', function($resource) {
    return $resource('/districts/:id', {id: '@id'});
}]);

app.factory('Calculation', ['$resource', function($resource){
    return $resource('/districts/:district_id/calculations/:id', {district_id: '@district_id', id: '@id'});
}]);

I set config/routes/rb like below:

resources :districts, :defaults => {format: :json} do
    resources :calculations, :defaults => {format: :json}
  end

and rake routes:

district_calculations GET    /districts/:district_id/calculations(.:format) calculations#index {:format=>:json}
                      POST   /districts/:district_id/calculations(.:format) calculations#create {:format=>:json}

But when I post data from angularjs to rails application, data are recieved to rails server, but when rails server want to save data to database, I get below error:

Started POST "/districts/17/calculations" for 127.0.0.1 at 2014-08-10 12:56:53 +
0430
Processing by CalculationsController#create as JSON
  Parameters: {"district_id"=>"17", "price"=>";sadkas", "calculation"=>{"distric
t_id"=>"17", "price"=>";sadkas"}}
Completed 500 Internal Server Error in 1ms

NoMethodError (undefined method `build' for #<Class:0x00000006371f30>)

If I used rails controller without InheritedResorces, I know I have to use build method instead of new, but I don't know how can I fix this problem. Any idea?!

NoMethodError (undefined method `build' for #)

0 Answers0