嵌套的属性不保存在连接表中USER_ID [英] nested attributes not saving the user_id in join table

问题描述

系统管理员主要控制器：

def new
  @admin = Admin.new
  @invitation = @admin.invitations.build
  @admi.user_admin_relationships.build
end

def create
  params[:invitation][:sender_id] = current_user.id
  @admin = Admin.new(params[:admin])
  if @admin.save
    redirect_to root_path
  else
    render 'new'
  end
end

邀请型号

belongs_to :admin
belongs_to :user

管理模型

has_many :invitations
has_many :user_admin_relationships
has_many :users, :through => :user_admin_relationships

accepts_nested_attributes_for :invitations
accepts_nested_attributes_for :user_admin_relationships, :allow_destroy => true

用户型号

has_many :invitations
has_many :user_admin_relationships
has_many :admins, :through => :user_admin_relationships

我的表格嵌套形式，它工作正常保存每个表单字段和项目，如 created_at 和 sent_at 。 但是，它不保存 USER_ID （user_admin连接表）和 SENDER_ID （邀请表）。

My forms are nested forms and it works fine saving the fields per the form and items such as created_at and sent_at. However, it does not save the user_id (user_admin join table) and sender_id (invitation table).

我尝试添加不同的排列到管理控制器，但没有什么工作。

I tried adding different permutations to the admin controller, but nothing is working.

的东西，不工作：

params[:invitation][:sender_id] = current_user.id

这给了我我有一个零对象时，没想到它的错误。

This gives me I have a nil object when I didn't expect it error.

params[:invitation].merge!(:sender_id = current_user.id)

这给我一个错误的语法错误

This give me a "wrong syntax error"

@admin.invitations.build(params[:invitation][:sender_id]) = current_user.id

这给了我意外的=和期望关键字结束错误

This gives me unexpected "=" and "expecting keyword end" error

我已经尝试了一堆其他的不同排列的为好。是不是有什么毛病我联想？我怎样才能更新 SENDER_ID 在丰富的邀请表和 USER_ID 加入user_admin_relationship表？我知道我可以通过做一个 hidden_​​field ，但听说了，我不想这样做，这不是安全的。

I have tried a bunch of other different permutations as well. Is there something wrong with my associations? How can I update the sender_id in the invitation table and the user_id in the rich join user_admin_relationship table? I know I can do it via a hidden_field, but heard it's not safe so I don't want to do that.

推荐答案

使用：

params[:invitation].merge!(:sender_id => current_user.id)

注意 =＆GT; ，而你只是有 = 。然而，在你的创建动作，要添加到 PARAMS [：邀请] ，但你是不是保存任何地方，所以它只是迷路。你可能想使用：

Notice the =>, whereas you just has =. However, in your create action, you are adding that to params[:invitation], but then you aren't saving that anywhere, so it's just getting lost. You probably want to use:

params[:admin][:invitations_attributes][:sender_id]

此外，您存储 SENDER_ID ，但你没有什么要告诉你的用户模型来寻找 SENDER_ID 作为外键。默认情况下它会寻找 USER_ID 。你必须补充一点：

Also, you are storing sender_id but you don't have anything to tell your User model to look for sender_id as the foreign key. By default it will look for user_id. You have to add this:

User: has_many :invitations, :foreign_key => 'sender_id'

和两种：

Invitation: belongs_to :sender, :class_name => "User" # recommended
# or 
Invitation: belongs_to :user, :foreign_key => 'sender_id'

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