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POHow to update data in join table in Rails 4
 

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  1. POHow to update data in join table in Rails 4
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    <p>I am building an app with Rails 4 using Devise and CanCan. When a new user registers they are not given a default role. The admin has to manually assign it through the admin panel. And that's where I am running into difficulty. I can't figure out how to update the data in the join field. Here's what I have so far.</p> <p>My UsersController:</p> <pre><code> class UsersController &lt; ApplicationController before_filter :authenticate_user! before_action :set_user, only: [:show, :update, :destroy] def index authorize! :index, @user, message: 'Not authorized as an administrator.' @users = User.all end def show end def update authorize! :update, @user, message: 'Not authorized as an administrator.' if @user.update_attributes(user_params) redirect_to users_path, notice: "User updated." else redirect_to users_path, alert: "Unable to update user." end end def destroy authorize! :destroy, @user, message: 'Not authorized as an administrator.' unless @user == current_user @user.destroy redirect_to users_path, notice: "User deleted." else redirect_to users_path, notice: "Can't delete yourself." end end private def set_user @user = User.find(params[:id]) end def user_params params.require(:user).permit(:name, :email, :role_id, :user_id) end end </code></pre> <p>And my role model:</p> <pre><code>class Role &lt; ActiveRecord::Base has_and_belongs_to_many :users, :join_table =&gt; :users_roles belongs_to :resource, :polymorphic =&gt; true scopify end </code></pre> <p>And my user model:</p> <pre><code>class User &lt; ActiveRecord::Base rolify # Include default devise modules. Others available are: # :token_authenticatable, :confirmable, # :lockable, :timeoutable and :omniauthable devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable end </code></pre> <p>As you can see it's pretty much the standard model as generated by Devise.</p> <p>And here's the form I'm using to update the role:</p> <pre><code>&lt;div id="role-options-&lt;%= user.id %&gt;" class="reveal-modal medium" style="display: none;"&gt; &lt;%= simple_form_for user, url: user_path(user), html: {method: :put, class: 'custom' } do |f| %&gt; &lt;h3&gt;Change Role&lt;/h3&gt; &lt;%= f.input :role_ids, collection: Role.all, as: :radio_buttons, label_method: lambda {|t| t.name.titleize}, label: false, item_wrapper_class: 'inline', checked: user.role_ids.first %&gt; &lt;%= f.submit "Change Role", class: "small button" %&gt; &lt;a class="close-reveal-modal" href="#"&gt;Close&lt;/a&gt; &lt;% end %&gt; &lt;/div&gt; </code></pre> <p>When I check the new role on the form and submit it, I am redirected to the users page with the message "User updated." However, the user role has not been updated. </p> <p>I'm still fairly new to Rails and just can't figure out exactly what I am doing wrong. If I understand correctly, I need to update the data in the user_roles table. I just can't figure out what I'm doing wrong.</p>
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    1. USDave Olson
    1. USDave Olson
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    1. COProbably, you should change `UsersController#user_params` to permit `:role_ids`
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      1. UStaro
    2. COHow many roles one user can have?
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      1. USbeck03076
    3. CO@taro Bang on! That's what the problem was. If you submit it as an answer, I would happily choose it as the right answer.
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      1. USDave Olson
 

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