我有一个管理所有注册用户的rails应用程序。所有crud操作都可以在注册用户的详细信息上完成。我现在需要限制应用程序,以便只允许管理员用户查看所有注册用户。任何没有管理员权限的用户都应该能够查看,编辑和删除他/她的帖子。我使用了devise gem进行身份验证,并计划使用cancancan gem进行授权。我只有一个名为Users的模型类,它包含一个文本属性(用于存储“Admin”或“Nonadmin”)。这是我的控制器代码:
class UsersController < ApplicationController
before_filter :authenticate_user!
def index
if current_user.role == "Admin"
@users = User.all
else
@user = User.find(current_user.id)
end
redirect_to new_user_registration_path if current_user.nil?
respond_to do |format|
format.html
end
end
def show
if (User.all.pluck(:id).include?params[:id].to_i) == false
flash[:notice] = "You cannot perform such an action"
else
@user = User.find(params[:id])
end
respond_to do |format|
format.html
end
end
def new
@user = User.new
end
def create
@user = User.new(user_params)
if @user.save
redirect_to :action => 'index'
else
render :action => 'new'
end
end
def user_params
params.require(:user).permit(:first_name, :last_name, :age, :biography, :email)
end
def edit
if (User.all.pluck(:id).include?params[:id].to_i) == false
flash[:notice] = "You cannot perform such an action"
else
@user = User.find(params[:id])
end
respond_to do |format|
format.html
end
end
def update
params.inspect
@user = User.find(params[:id])
if @user.update_attributes(user_params)
redirect_to :action => 'show', :id => @user
else
render :action => 'edit'
end
end
def delete
User.find(params[:id]).destroy
redirect_to :action => 'index'
end
end
我的用户表包含以下字段:id,email,first_name,last_name,传记,电子邮件,角色。它还包含所有与设计相关的字段.Below是我的用户模型:
class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
after_initialize :default_values
private
def default_values
self.role ||= "Non-admin"
end
end
我在seeds.rb中硬编码了我的管理员凭据,如下所示:
如果User.find_by(:role =&gt;'Admin')。nil? User.create([{email:“admin_user@usermanagementsystem.com”,密码:“topsecret”,first_name:“admin”,last_name:“ums”,传记:“我在ums担任管理员”,年龄:20岁,角色:“Admin”}]) 端
查看文件: Index.html.erb: -
<table id="albums" cellspacing="0">
<thead>
<tr>
<th> NAME </th>
<th> EMAIL </th>
<% if current_user.role == "Admin" %>
<th> EDIT </th>
<th> SHOW </th>
<th> DESTROY </th>
<% end %>
<th colspan="15"></th>
</tr>
</thead>
<% if current_user.role == "Admin" %>
<% @users.each do |user| %>
<tr>
<td><%= user.first_name %></td>
<td><%= user.email %></td>
<td><%= link_to 'Edit', users_edit_path(id: user.id), class: "small button"%></td>
<td><%= link_to 'Show', users_show_path(id: user.id), class: "small button"%></td>
<td><%= link_to 'Destroy', users_delete_path(id: user.id), method: :delete, data: { confirm: 'Are you sure?' } , class: "small button"%></td>
</tr>
<% end %>
<% else %>
<tr>
<td><%= @user.first_name %></td>
<td><%= @user.email %></td>
<td><%= link_to 'Edit', users_edit_path(id: @user.id), class: "small button" %></td>
<td><%= link_to 'Destroy', users_delete_path(id: @user.id), method: :delete, data: { confirm: 'Are you sure?' } , class: "small button"%></td>
</tr>
<%end %>
</table>
<%#= link_to 'Change password', edit_user_registration_path, class: "small button" %>
edit.html.erb: -
<% if @user.nil? == false %>
<%= form_for @user , :as => :user, :url => users_update_path(@user), :method => :PUT do |f| %>
<%= f.label :first_name %>:
<%= f.text_field :first_name %><br>
<%= f.label :last_name %>:
<%= f.text_field :last_name %><br>
<%= f.label :age %>:
<%= f.number_field :age %><br>
<%= f.label :biography %>:
<%= f.text_field :biography %><br>
<%= f.label :email %>:
<%= f.text_field :email %><br>
<%= f.submit :class => 'small button' %>
<% end %>
<%else%>
<h3> Such a user record does not exist. Please click on a specific user </p>
<%end%>
show.html.erb
<br>
<br>
<% if @user.nil? == false %>
<h3>User details</h3>
<table id="albums" cellspacing="0">
<thead>
<tr>
<th>FIRSTNAME</th>
<th>LASTNAME</th>
<th>EMAIL</th>
<th>BIOGRAPHY</th>
<th>AGE</th>
<th colspan="20"></th>
</tr>
</thead>
<tr>
<td> <%= @user.first_name %> </td>
<td> <%= @user.last_name %> </td>
<td> <%= @user.email %> </td>
<td> <%= @user.biography %> </td>
<td> <%= @user.age %> </td>
</tr>
</table>
<%= link_to ' Edit ', users_edit_path(id: @user.id) , class: "small button"%>
<%= link_to 'Delete ', users_delete_path(id: @user.id), method: :delete, data: { confirm: 'Are you sure?' }, class: "small button" %>
<%else%>
<h3> Such a user record does not exist. Please click on a specific user </p>
<%= link_to "Logout", destroy_user_session_path, method: :delete, class: "small button" %>
</footer>
<%end%>
任何人都可以帮助我使用cancancan gem限制管理员以外的任何用户查看,编辑,更新和删除自己的帖子。管理员应该能够对每个人的记录进行这些操作。
如果您发现我对控制器代码执行了错误,请帮助我改进。提前谢谢。
答案 0 :(得分:0)
将以下代码添加到ability.rb的初始化函数中,并使其正常工作。
如果user.role ==&#34; Admin&#34; 可以:管理,:全部 其他 can [:index],User,id:user.id 可以[:show],用户,id:user.id 可以[:edit],User,id:user.id 可以[:update],User,id:user.id 可以[:delete],User,id:user.id 端