无法访问变量

Question

我有一个请求模型，它存储一个人的性别、健康水平和可用性。该对象属于用户模型。我想要做的是将最初发出请求的人的用户 ID 传递给，并在用户单击按钮时将 :user 参数发送到邮件控制器上的操作 send_mail 。这不起作用，Rails 表示意外的关键字。我基本上是在尝试将请求对象的 user.id 传递给邮件控制器 send_email 操作。在这里它将使用 user_id 找到用户，然后从那里我会找到用户的电子邮件。然后，我将向用户发送一封包含此变量的电子邮件。

请求控制器

class RequestsController < ApplicationController
before_action :authenticate_user!

def index
    @requests = Request.all
end

def create
    @request = Request.new(request_params)
    @request.user = current_user
    @request.save
    redirect_to requests_path 
end

def new
    @request = Request.new
end

def destroy
end

private 
    def request_params
        params.require(:request).permit(:gender, :level, :time_available)
    end
end

Index.html.erb

<% provide(:title, "Open Requests") %>
<table class="table table-hover">
  <th>Gender</th>
  <th>Level</th>
  <th>Time Available: </th>
  <% @requests.each do |request| %>
  <tr>
    <td><%= request.gender %></td>
    <td><%= request.level %></td>
    <td><%= request.time_available %></td>
    <td><%= button_to "I want to exercise with you!", {:controller => "mail", :action => "send_email", :user => Request.user }  class: "btn btn-primary" %></td>
  </tr>
<% end %>
</table>

邮件控制器

class MailController < ApplicationController
    def send_email
        @creation_user = :user
        @email = @creation_user.email
    end
end

Send_Email.html.erb

<h2><%= @email %></h2>

Answer 1

在您的情况下，您需要从参数哈希中提取用户：

def send_email
  @creation_user = params[:user]
  @email = @creation_user.email
end

更新：

你应该定义一个nested resource.

config/routes.rb

resources :requests, only: [:index, :new, :create] do
  resources :mails, only: [:create]
end

现在更新您的视图以使用您的新路线。

app/views/requests/index.html.erb

<%= button_to "I want to work out with you!", request_mails_path(request) %>

更新您的控制器。

app/controllers/mails_controller.rb

def create
  @email = user.email
end

private

def user
  find_request.user
end

def find_request
  Request.find(params[:request_id])
end

将视图 send_email.html.erb 重命名为 create.html.erb

Answer 2

您可以通过将 user 传递给函数

来尝试

 class MailController < ApplicationController
    def send_email
        @creation_user = params[:user]
        @email = @creation_user.email
    end
end

在路线中config/routes.rb

get "mail/send_mail", to: 'mail#send_mail'

无法访问变量

Can't Access Variables

ruby-on-rails

ruby

email

attributes