Javascript 按钮从视图调用控制器操作以更新数据库列
我试图在单击按钮时将用户添加到表列(PostgreSQL)中的数组中。按钮点击注册,但没有调用控制器方法,也没有给出错误 我有下面这个按钮的视图 views/users/index.html.erbJavascript 按钮从视图调用控制器操作以更新数据库列,javascript,ruby-on-rails,ajax,postgresql,ruby-on-rails-4,Javascript,Ruby On Rails,Ajax,Postgresql,Ruby On Rails 4,我试图在单击按钮时将用户添加到表列(PostgreSQL)中的数组中。按钮点击注册,但没有调用控制器方法,也没有给出错误 我有下面这个按钮的视图 views/users/index.html.erb <%= form_for(Pairing.new, url: users_path, method: :patch, html: { id: 'my_special_form' }) do |f| %> <div class="field"> <%= f.l
<%= form_for(Pairing.new, url: users_path, method: :patch, html: { id: 'my_special_form' }) do |f| %>
<div class="field">
<%= f.label :supervisor_id %>
<%= f.collection_select(:supervisor_id, User.where(role: 1), :id, :name) %>
</div>
<div class="field">
<%= f.label :student_id %>
<%= f.collection_select(:student_id, User.where(role: 0), :id, :name) %>
</div>
<%= f.submit %>
<% end %>
我正在尝试在控制器中调用此方法
class UsersController < ApplicationController
before_action :authenticate_user!
after_action :verify_authorized
def index
@users = User.all
authorize User
end
def show
@user = User.find(params[:id])
authorize @user
end
def update
@user = User.find(params[:id])
authorize @user
if @user.update_attributes(secure_params)
redirect_to users_path, :notice => "User updated."
else
redirect_to users_path, :alert => "Unable to update user."
end
end
def destroy
user = User.find(params[:id])
authorize user
user.destroy
redirect_to users_path, :notice => "User deleted."
end
def pair
supervisor = User.find(params[:id1])
student = User.find(params[:id2])
studentlist = supervisor.select(:supervised_students)
studentlist << student.
supervisor.update_attribute(:supervised_students => studentlist)
@supervisor.save
end
private
def secure_params
params.require(:user).permit(:role)
end
end
控制器/用户\u控制器
class UsersController < ApplicationController
before_action :authenticate_user!
after_action :verify_authorized
def index
@users = User.all
authorize User
end
def show
@user = User.find(params[:id])
authorize @user
end
def update
@user = User.find(params[:id])
authorize @user
if @user.update_attributes(secure_params)
redirect_to users_path, :notice => "User updated."
else
redirect_to users_path, :alert => "Unable to update user."
end
end
def destroy
user = User.find(params[:id])
authorize user
user.destroy
redirect_to users_path, :notice => "User deleted."
end
def pair
supervisor = User.find(params[:id1])
student = User.find(params[:id2])
studentlist = supervisor.select(:supervised_students)
studentlist << student.
supervisor.update_attribute(:supervised_students => studentlist)
@supervisor.save
end
private
def secure_params
params.require(:user).permit(:role)
end
end
Routes.rb
Rails.application.routes.draw do
devise_for :users
resources :users
resources :pairings
resources :conversations, only: [:index, :show, :destroy] do
member do
post :reply
end
end
resources :conversations, only: [:index, :show, :destroy] do
member do
post :restore
end
end
resources :conversations, only: [:index, :show, :destroy] do
collection do
delete :empty_trash
end
end
resources :conversations, only: [:index, :show, :destroy] do
member do
post :mark_as_read
end
end
resources :messages, only: [:new, :create]
devise_scope :user do
authenticated :user do
root 'pages#index', as: :authenticated_root
end
unauthenticated do
root 'pages#welcome', as: :unauthenticated_root
end
end
root to: 'pages#index'
end
URI中的#
用于片段标识符-根据规范,它对服务器是透明的
因此,当您发送ajax请求时,它实际上被解释为POST/users
root
用于设置/
路径的处理程序。如果您想添加POST users/pair
,您可以这样做
resources :users do
collection do
post 'pair', to: "users#pair"
end
end
请注意,routes中的#
表示控制器#操作
,与结果无关
然而,这是我处理问题的方式
建立关系
确保在用户
上有一个主管id
列
class User < ActiveRecord::Base
has_many :students, class_name: "Users",
foreign_key: "supervisor_id"
belongs_to :supervisor, class_name: "User"
end
形式
如果你只是简单地列出学生,你可以使用这样一个简单的表格,你会很乐意去:
<%= form_for(user) do |f| %>
<%= f.collection_select :supervisor, User.where(role: 1) %>
<%= f.submit %>
<% end %>
我想我已经设法将数据从视图发送到javascript。我认为我的问题是将数据从javascript发送到我的控制器Action。我目前正在按照您解释的方式进行尝试,但是在您使用的用户模型中有很多关系。我的学生角色用户只能有一个与他们相关的主管,因此我是否应该将相关的主管改为有一个?谢谢你的详细回答顺便说一句!啊,从你的表现来看,我猜这是多对多。将编辑答案。希望能够将一名导师与许多学生配对,但一名学生只能有一名导师。我已将您提供的表单放入我的users/index.html.erb文件中,但它给出了一个“未定义的方法`local_assignments'”错误。是否必须将其放置在pairings/_form.html.erb目录中才能正常工作?再次感谢:)由于它是围绕多对多关系建立的,所以它仍然不会起作用。我正在进行编辑。单击“配对”按钮后,它会将我链接到我的用户配置文件页面,并说1个错误禁止保存此用户(设计用户视图)。在chrome控制台上,它显示错误“uncaughtSyntaxError:意外标识符”,指向javascript文件中的“type:'PATCH',”行。用当前代码编辑我的原始问题。
class User < ActiveRecord::Base
has_many :students, class_name: "Users",
foreign_key: "supervisor_id"
belongs_to :supervisor, class_name: "User"
end
PATCH /users/5 { supervisor_id: 6 }
<%= form_for(user) do |f| %>
<%= f.collection_select :supervisor, User.where(role: 1) %>
<%= f.submit %>
<% end %>
# app/models/pairing
class Pairing
include ActiveModel::Model
attr_accessor :supervisor_id, :student_id
end
<%= form_for(Pairing.new, url: users_path, method: :patch, html: { id: 'my_special_form' }) do |f| %>
<div class="field">
<%= f.label :supervisor_id %>
<%= f.collection_select(:supervisor_id, User.where(role: 1), :id, :name) %>
</div>
<div class="field">
<%= f.label :supervisor_id %>
<%= f.collection_select(:student_id, User.where(role: 0), :id, :name) %>
</div>
<%= f.submit %>
<% end %>
$("#my_special_form").submit(function(){
var url = this.action + "/" + this.elements["pairing[student_id]"].value;
$.ajax(url, {
beforeSend: $.rails.CSRFProtection,
data: {
user: {
supervisor_id: this.elements["pairing[supervisor_id]"].value
}
},
type: 'PATCH',
dataType: 'JSON',
success: function(data, textStatus, jqXHR) {
console.log('Success', data, textStatus, jqXHR);
}
});
return false; // cancels out the normal form submission
});