我有一个编辑视图,允许我更新特定用户的角色.我已经包含了下面的代码,但是,为了给你一个想法,当我取消选中页面上的框时,我的控制器中的put语句正确地发现角色关联是错误的,可以在日志中进一步查看.
但是,稍后在日志中,您可以看到角色重新关联回“true”,我不确定为什么会出现这种情况！
用户/ edit.html.erb：
<fieldset>
<%= form_for @user,:url => {action: "update"},:html => { :class => 'user-role' } do |f| %>
<h1 class="h1-heading">User Roles</h1>
<p class="user-paragraph"> Check the Boxes to grant different roles to <%= @user.first_name %> <%= @user.last_name %>:</p>
<%= f.label(:admin) do %>
<%= hidden_field_tag(:admin,0) %>
<%= check_Box_tag(:admin,1,@user.has_role?(:admin)) %>
Administrator
<% end %>
<%= f.label(:member) do %>
<%= hidden_field_tag(:member,0) %>
<%= check_Box_tag(:member,@user.has_role?(:member)) %>
Member
<% end %>
<%= f.submit class: 'btn btn-primary-dialog pull-right' %>
<% end %>
</fieldset>
users_controller.rb：
def update
@user = User.find(params[:id])
@customer = current_user.customer
@logged_in_user = User.find_by_email(current_user.email)
if params[:admin] == "1"
@user.grant(:admin)
elsif params[:admin] == "0"
@user.remove_role(:admin)
end
if params[:member] == "1"
@user.grant(:member)
elsif params[:member] == "0"
@user.remove_role(:member)
end
puts "NEW ROLES"
puts @user.has_role? :member
puts @user.has_role? :admin
if @user.update_attributes(params[:user])
puts "UPDATING USER"
puts @user.has_role? :member
puts @user.has_role? :admin
redirect_to '/users/show',:flash => { :alert => 'User was successfully updated.' }
end
end
end
日志：
正如您在下面看到的,它返回’false’,然后在更新属性时,再次将角色设置为’true’,我无法确定发生的位置或原因！
Started PATCH "/users/51" for 127.0.0.1 at 2015-06-26 13:48:58 +1000
Processing by UsersController#update as HTML
Parameters: {"utf8"=>"✓","authenticity_token"=>"+qNti57HxMa2B/a+c6nS71Qp0p7hf+kTE4b5eiBI4No=","admin"=>"0","member"=>"0","commit"=>"Update User","id"=>"51"}
User Load (0.5ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
Customer Load (0.3ms) SELECT `customers`.* FROM `customers` WHERE `customers`.`email` = 'ryan@ryandrake.com' LIMIT 1
Company Load (0.2ms) SELECT `companies`.* FROM `companies` WHERE `companies`.`domain` = 'ryandrake.com' LIMIT 1
CustomerAccess Load (0.3ms) SELECT `customer_accesses`.* FROM `customer_accesses` WHERE `customer_accesses`.`customer_id` = 1 LIMIT 1
User Load (0.3ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 51 LIMIT 1
CACHE (0.0ms) SELECT `customers`.* FROM `customers` WHERE `customers`.`email` = 'ryan@ryandrake.com' LIMIT 1
User Load (0.2ms) SELECT `users`.* FROM `users` WHERE `users`.`email` = 'ryan@ryandrake.com' LIMIT 1
Role Load (0.3ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51 AND `roles`.`name` = 'admin'
(0.1ms) BEGIN
(0.2ms) DELETE FROM `users_roles` WHERE `users_roles`.`user_id` = 51 AND `users_roles`.`role_id` IN (9)
(0.9ms) COMMIT
(0.3ms) SELECT COUNT(count_column) FROM (SELECT 1 AS count_column FROM `users` INNER JOIN `users_roles` ON `users`.`id` = `users_roles`.`user_id` WHERE `users_roles`.`role_id` = 9 LIMIT 1) subquery_for_count
Role Load (0.3ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51 AND `roles`.`name` = 'member'
(0.1ms) BEGIN
(0.2ms) DELETE FROM `users_roles` WHERE `users_roles`.`user_id` = 51 AND `users_roles`.`role_id` IN (3)
(0.4ms) COMMIT
(0.5ms) SELECT COUNT(count_column) FROM (SELECT 1 AS count_column FROM `users` INNER JOIN `users_roles` ON `users`.`id` = `users_roles`.`user_id` WHERE `users_roles`.`role_id` = 3 LIMIT 1) subquery_for_count
NEW ROLES
Role Load (0.7ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51 AND (((roles.name = 'member') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))
false
Role Load (0.6ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))
false
(0.3ms) BEGIN
Customer Load (0.3ms) SELECT `customers`.* FROM `customers` WHERE `customers`.`email` = 'ryan.drake2@otherlevels.com' LIMIT 1
ExtraCustomerAccount Load (0.6ms) SELECT `extra_customer_accounts`.* FROM `extra_customer_accounts` WHERE `extra_customer_accounts`.`email` = 'ryan.drake2@otherlevels.com' LIMIT 1
Customer Load (0.3ms) SELECT `customers`.* FROM `customers` WHERE `customers`.`id` = 1 LIMIT 1
Company Load (0.2ms) SELECT `companies`.* FROM `companies` WHERE `companies`.`domain` = 'otherlevels.com' LIMIT 1
Company Load (0.2ms) SELECT `companies`.* FROM `companies` WHERE `companies`.`name` = 'None' ORDER BY `companies`.`id` ASC LIMIT 1
Role Load (0.3ms) SELECT `roles`.* FROM `roles` WHERE `roles`.`name` = 'member' AND `roles`.`resource_type` IS NULL AND `roles`.`resource_id` IS NULL ORDER BY `roles`.`id` ASC LIMIT 1
Role Exists (0.2ms) SELECT 1 AS one FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51 AND `roles`.`id` = 3 LIMIT 1
(0.2ms) SELECT `roles`.id FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51
Role Load (0.2ms) SELECT `roles`.* FROM `roles` WHERE `roles`.`id` = 3 LIMIT 1
Role Load (0.3ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51
(0.2ms) INSERT INTO `users_roles` (`user_id`,`role_id`) VALUES (51,3)
Role Load (0.6ms) SELECT `roles`.* FROM `roles` WHERE `roles`.`name` = 'admin' AND `roles`.`resource_type` IS NULL AND `roles`.`resource_id` IS NULL ORDER BY `roles`.`id` ASC LIMIT 1
Role Load (0.3ms) SELECT `roles`.* FROM `roles` WHERE `roles`.`id` IN (3,9)
(0.2ms) INSERT INTO `users_roles` (`user_id`,9)
(0.3ms) COMMIT
UPDATING USER
Role Load (0.4ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51 AND (((roles.name = 'member') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))
true
Role Load (0.3ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 51 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))
true
Role Load (0.3ms) SELECT `roles`.* FROM `roles` INNER JOIN `users_roles` ON `roles`.`id` = `users_roles`.`role_id` WHERE `users_roles`.`user_id` = 1 AND (((roles.name = 'otherlevels_admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))
Redirected to http://localhost:3000/users/show
Completed 302 Found in 80ms (ActiveRecord: 15.1ms)
如果指出它没有正确更新参数,我会非常乐意帮忙！
解决方法
你的主要问题是：
@ user.update_attributes(PARAMS [：USER_ID])
编辑 – 我原来的解决方案根本不起作用.
与我原来的解决方案不同,这不需要简单的形式.
首先让我们设置表单：
<%= form_for(@user,url: {action: "update"},html: { class: 'user-role' }) do |f| %>
<h1 class="h1-heading">User Roles</h1>
<p class="user-paragraph"> Check the Boxes to grant different roles to <%= @user.first_name %> <%= @user.last_name %>:</p>
<%= f.fields_for(:roles) do |r| %>
<%= r.hidden_field :name unless r.object.persisted? %>
<%= r.label :_keep do %>
<%= r.check_Box :_keep,checked: r.object.persisted? %>
<%= r.object.name %>
<% end %>
<% end %>
<% end %>
我们将为角色传递一些嵌套属性：
>名称(适用于新角色)
> _keep一个虚拟属性 – 我们保存角色
> id(如果角色存在,则由rails自动插入)
然后我们将用户类修改为accepts_nested_attributes_for：roles
class User < ActiveRecord::Base
rolify
accepts_nested_attributes_for :roles,allow_destroy: true,reject_if: ->(hash){ hash["_keep"] != "1" }
end
注意reject_if： – >(哈希){hash [“_ keep”]！=“1”}这意味着如果取消选中该复选框,我们就不会创建一个角色,而如果我们传递_delete = true则会删除该角色的allow_destroy .
class Role < ActiveRecord::Base
has_and_belongs_to_many :users,:join_table => :users_roles
belongs_to :resource,:polymorphic => true
validates :resource_type,:inclusion => { :in => Rolify.resource_types },:allow_nil => true
scopify
attr_accessor :_keep
AVAILABLE_ROLES = %w{ administrator member }
end
我们还添加了一个AVAILABLE_ROLES常量,以便我们可以获得角色列表.
class UsersController < ApplicationController
before_action :set_user,only: [:show,:edit,:update,:destroy]
# ...
# GET /users/1/edit
def edit
# Seed checkBoxes for roles
Role::AVAILABLE_ROLES.each do |role|
# This adds an unsaved role to the user if it does not exist
@user.roles.build(name: role) unless @user.has_role?(role)
end
end
# PATCH/PUT /users/1
def update
if @user.update(update_params)
redirect_to @user,notice: 'User was successfully updated.'
else
render :edit
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_user
@user = User.find(params[:id])
end
# Only allow a trusted parameter "white list" through.
def user_params
params.require(:user).permit(:username,:email,roles_attributes: [:name,:id,:_keep,:_destroy])
end
def update_params
user_params.tap do |o|
# Adds the _delete attribute if the keep checkBox is unchecked
o[:roles_attributes] = o[:roles_attributes].map do |k,h|
attrs = h.merge(_destroy: (h[:_keep] != "1"))
# Don't let the user update the name of an existing Role!
# This would let a malicIoUs user to grant any role.
h.key?(:id) ? attrs.except(:name) : attrs
end
end
end
end