def delete_users
users = User.active.where(:id=>params[:users])
users.each do |user|
array = []
if user.active?
array << user
end
end
if (array.count > 0)
user.update_attributes(:status => "inactive")
else
"I want an alert/popup here saying no users, when 'delete_users' is called and the condition comes here."
........ do other stuff ......
end
end
结束
在 Controller 中，我有此方法，将进行ajax调用以进入此方法，当条件变为其他情况时，我需要一个警报/弹出窗口，提示没有用户要删除，然后可以更新其他内容。
提前致谢。
最佳答案
在else块中尝试以下操作:
render html: "<script>alert('No users!')</script>".html_safe
请注意，如果要在适当的HTML布局中添加
<script>标记(带有<head>标记等)，则需要明确指定一个布局:render(
html: "<script>alert('No users!')</script>".html_safe,
layout: 'application'
)
编辑:
这里还有一些代码:
app / controllers / users_controller.rb:
class UsersController < ApplicationController
def delete_users
users = User.active.where(:id=>params[:users])
array = []
users.each do |user|
if user.active?
array << user
end
end
if (array.count > 0)
user.update_attributes(:status => "inactive")
else
render(
html: "<script>alert('No users!')</script>".html_safe,
layout: 'application'
)
end
end
end
user.rb:
class User < ActiveRecord::Base
# for the sake of example, simply have User.active return no users
def self.active
none
end
end
config / routes.rb:
Rails.application.routes.draw do
# simply visit localhost:3000 to hit this action
root 'users#delete_users'
end