Question

I just using activeadmin gem:

rails generate active_admin:resource Team

rails generate active_admin:resource Players

app/models

class Team < ActiveRecord::Base
  has_many :players
  attr_accessible :description, :name
end

class Player < ActiveRecord::Base
  belongs_to :team
  attr_accessible :description, :name
end

app/controller/players_controller

class PlayersController < ApplicationController
    def create
        @team = Team.find(params[:team_id])
        @player = @team.players.create(params[:player])
    end
end

app/admin/

  ActiveAdmin.register Team do
  end

  ActiveAdmin.register Player do
  end

When I tried to create a new Player using the admin interface, I receive:

ActiveModel::MassAssignmentSecurity::Error in Admin::PlayersController#create

Can't mass-assign protected attributes: team_id

I know that I have to do something more, but what? Thanks a lot.

Answer 1

You need to add team_id to attr_accessible:

class Player < ActiveRecord::Base
    belongs_to :team
    attr_accessible :description, :name, :team_id
end