如何使用has_many:through关联创建复选框网格

时间:2013-03-11 17:56:34

标签: ruby-on-rails ruby-on-rails-3 simple-form has-many-through twitter-bootstrap-rails

好的,我有以下设置,需要一些方向。我在这个问题上浪费了将近2天的时间,我需要继续前进:

因此,角色和权限通过RolePermissions关联 角色 - > RolePermission - >许可

我希望创建一个复选框网格,允许我同时编辑所有角色和权限。

这就是我在视觉上寻找的东西:Roles / Permissions checkbox grid

任何帮助将不胜感激!另外,我使用的是simple_form和bootstrap。

2 个答案:

答案 0 :(得分:2)

试试这个,

# /config/routes.rb

resources :roles do
  collection do
    get :edit_multiple
    put :update_multiple
  end
end


# /app/controllers/roles_controller.rb

class RolesController < ApplicationController
  def edit_multiple
    @roles = Role.all
    @permissions = Permission.all
  end

  def update_multiple
    params[:roles] = {} unless params.has_key?(:roles) # if all checkboxes unchecked.
    Role.all.each do |role|
      # this allows for 0 permission checkboxes being checked for a role.
      unless params[:roles].has_key?(role.id.to_s)
        params[:roles][role.id] = { permission_ids: [] }
      end
    end
    @roles = Role.update(params[:roles].keys, params[:roles].values)
    @roles.reject! { |r| r.errors.empty? }
    if @roles.empty?
      redirect_to edit_multiple_roles_path
    else
      render :edit_multiple
    end
  end
end


# /app/views/roles/edit_multiple.html.erb

<%= form_tag update_multiple_roles_path, method: :put do %>
  <table>
    <tr>
      <th></th>
      <% @permissions.each do |permission| %>
        <th><%= permission.name %></th>
      <% end %>
    </tr>
    <% @roles.each do |role| %>
      <tr>
        <th><%= role.name %></th>
        <% @permissions.each do |permission| %>
          <td><%= check_box_tag "roles[#{role.id}][permission_ids][]", permission.id, role.permissions.include?(permission) %></td>
        <% end %>
      </tr>
    <% end %>
  </table>

  <%= submit_tag "Save" %>
<% end %>


# /app/models/role.rb

class Role < ActiveRecord::Base
  has_many :role_permissions
  has_many :permissions, through: :role_permissions
  attr_accessible :name, :permission_ids
end

这是http://railscasts.com/episodes/17-habtm-checkboxeshttp://railscasts.com/episodes/165-edit-multiple-revised

的组合

修改

刚注意到我把桌子向后推了一下。这将把角色放在顶部,权限放在一边,

# /app/views/roles/edit_multiple.html.erb

<%= form_tag update_multiple_roles_path, method: :put do %>
  <table>
    <tr>
      <th></th>
      <% @roles.each do |role| %>
        <th><%= role.name %></th>
      <% end %>
    </tr>
    <% @permissions.each do |permission| %>
      <tr>
        <th><%= permission.name %></th>
        <% @roles.each do |role| %>
          <td><%= check_box_tag "roles[#{role.id}][permission_ids][]", permission.id, role.permissions.include?(permission) %></td>
        <% end %>
      </tr>
    <% end %>
  </table>

  <%= submit_tag "Save" %>
<% end %>

答案 1 :(得分:1)

将此作为OP的请求作为答案添加:

在habtm上有一个带有复选框的railscast,你可以根据自己的需要调整它:railscasts.com/episodes/17-habtm-checkboxes