Why Rails messing with params?
angularjs, ruby-on-rails, ruby-on-rails-4, strong-parameters
Solution
Indeed, Rails messing with request `params` as specified by default in `config/initializers/wrap_parameters.rb`:
ActiveSupport.on_load(:action_controller) do
wrap_parameters format: [:json] if respond_to?(:wrap_parameters)
end
To stop this behavior, one could do:
ActiveSupport.on_load(:action_controller) do
wrap_parameters format: [] if respond_to?(:wrap_parameters)
end
Relevant info:
- http://api.rubyonrails.org/classes/ActionController/ParamsWrapper/ClassMethods.html#method-i-wrap_parameters
- https://stackoverflow.com/a/10775570/247243
Problem
I do `POST http://0.0.0.0:3000/clients` with the following request payload: ``` {"name": "David Smith", "email": "david@site.com"} ``` Both Firefox and Chrome clearly show that this is the payload. But, in the Rails logs I see: Started POST "/api/clients" for 127.0.0.1 at 2014-01-05 20:59:52 +1100 Processing by ClientsController#create as HTML Parameters: {"name"=>"David Smith", "email"=>"david@site.com", "client"=>{"name"=>"David Smith", "email"=>"david@site.com"}} Indeed, if I print out `params` in `ClientsController#create`, I see that it contains the key `client`. How does the `"client"=>{"name"=>"David Smith", "email"=>"david@site.com"}` part become part of `params`? Why Rails messing with `params`? I use Rails 4.0.2. The request is made using AngularJS: ``` ClientsNewCtrl = ['$scope', '$http', '$q', ($scope, $http, $q) -> $scope.client = name: '' email: '' $scope.createNewClient = -> defer = $q.defer() $http.post('/api/clients', $scope.client).success -> console.log 'Success!' defer.resolve() .error (errors, status) -> errors = ["Couldn't create the client."] if status != 422 console.log errors defer.reject(errors) defer.promise ] ``` Here is the example that I created to demonstrate the issue: https://github.com/moroshko/rails-params - `rails s` - Go to `http://0.0.0.0:3000` - Open browser's console to observe the request - Enter name, email and click Create - Check out Rails logs to see that `params` have the extra `client` key