Question

背景 - 我有2个模型，一个上传模型和一个用户模型。最初我在上传模型（表）中有owner_id作为用户模型中用户id的外键。但是我无法使用外键工作，因此我决定通过将owner_id重命名为user_id来实现“rails”方式。即使将列设置为user_id，也不会填充任何值。

 class User < ActiveRecord::Base
has_many :uploads
end

class Upload < ActiveRecord::Base
belongs_to :user
end

尝试过显式设置密钥，但仍然没有填充上传表格中的user_id字段

 class User < ActiveRecord::Base
has_many :uploads ,:foreign_key => 'user_id'
end

可能是简单的东西，但我似乎无法找到它是什么。有什么建议？

**上传控制器

class UploadsController < ApplicationController


  def index

   @uploads = Upload.all 

  end

  def new
   @upload = Upload.new
  end

 def create
  @upload = Upload.new(params[:upload])
    if @upload.save
        flash[:notice] = "your file has been uploaded"
        redirect_to uploads_path

    else
        render :action => 'new'
    end
 end

 def destroy
  @upload = Upload.find(params[:id])
  @upload.destroy
  flash[:notice] = "Sucessfully deleted your file"
  redirect_to uploads_path
 end


 def download
    upload = Upload.find(params[:id])
    #location = "#{Rails.root}" 

   # send_file  (@upload)
#send_file('public/test_file.pdf', :filename => 'Test File', :type => 'application/pdf', :disposition => 'attachment', :streaming => 'true', :buffer_size => '4096')
    send_file  upload.uploaded.path,
        :filename => upload.uploaded_file_name,
                :type => upload.uploaded_content_type,
        :disposition => 'attachment'
    flash[:notice] = "Your file has been downloaded"
 end


end

**上传表单

<%= form_for(@upload, :html => { :multipart => true }) do |form| %>
 <form>
<fieldset>
<div class="clearfix">
         <label for="fileInput">File input</label>
 <div class="input">
          <%= form.file_field :uploaded %>
</div>


 <div class="actions">
           <input type="submit" class="btn primary" <%= form.submit "Upload" %> &nbsp;<button type="reset" class="btn">Cancel</button>
          </div>


</fieldset>
</form>
<% end %>

==架构信息

表名：用户

id：integer not null，主键

email：string（255）default（“”），not null

encrypted_password：string（128）default（“”），not null

reset_password_token：string（255）

reset_password_sent_at：datetime

remember_created_at：datetime

sign_in_count：整数默认值（0）

current_sign_in_at：datetime

last_sign_in_at：datetime

current_sign_in_ip：string（255）**

last_sign_in_ip：string（255）

created_at：datetime

updated_at：datetime

admin：boolean default（FALSE）

==架构信息-----------------------------------------

表名：上传

id：integer

created_at：datetime

updated_at：datetime

uploaded_file_name：string（255）

uploaded_content_type：string（255）

uploaded_file_size：integer

uploaded_updated_at：datetime

user_id：整数

Answer 1

在您的代码中

class User < ActiveRecord::Base
has_many :uploads ,:foreign_key => 'users_id'
end

users_id应为user_id。

活动记录不使用has_many和belongs_to设置外键

1 个答案: