nil:NilClass 的未定义方法“cliq_requests”

Question

我一直收到这个烦人的错误，但我无法解决。我最近发布了一个关于同一主题的问题，但没有得到有效的帮助。

我希望用户请求加入群组。 Cliqs = 组。我所有的控制台测试似乎都是正确的，但我似乎无法找到解决问题的方法。该关联正在显示，但我似乎无法将 update/accept 方法获取到运行。

这让我发疯！我该如何解决这个问题？

这是我的代码：

我的模特：

class User < ActiveRecord::Base
has_many :uploads

has_one :owned_cliq, foreign_key: 'owner_id', class_name: 'Cliq', dependent: :destroy

has_many :cliq_memberships, dependent: :destroy
has_many :cliqs, through: :cliq_memberships

has_many :cliq_requests, dependent: :destroy
...
end


class Cliq < ActiveRecord::Base
belongs_to :owner, class_name: 'User'

has_many :cliq_memberships, dependent: :destroy
has_many :members, through: :cliq_memberships, source: :user

has_many :cliq_requests, dependent: :destroy                                #cliq_request_sender
has_many :pending_members, through: :cliq_requests, source: :user, foreign_key: 'user_id'
end


class CliqRequest < ActiveRecord::Base
#from
belongs_to :user
#to
belongs_to :cliq

#validate :not_member

#validate :not_pending

def accept
    cliq.members << pending_member
    destroy
end
end

我的控制器：

class CliqRequestsController < ApplicationController

def index
    #incoming
    #@cliq_requests_received = CliqRequest.where(cliq: cliq)
    #outgoing
    #@cliq_requests_sent = current_user.cliq_requests
end

def show
end

def create
    cliq = Cliq.find_by(params[:id])
    @cliq_request = current_user.cliq_requests.new(cliq: cliq)


    if @cliq_request.save
        redirect_to current_user #change to cliqs/cliq path later
    else
        redirect_to cliq_path
    end 
end

def update
    @cliq = Cliq.find_by(id: params[:cliq_id])
    @cliq_request = @cliq.cliq_requests.find_by(id: params[:id])
    @cliq_request.accept
end

def destroy
    @cliq_request.destroy
end
end

我的看法：

<h1><%= @cliq.name %></h1>

<%= link_to 'Request to join Cliq', '/cliqs/:cliq_id/cliq_requests', :method => :post %>

<% @cliq_members.each do |cliq_member| %>
<ul><%= link_to cliq_member.username, user_path(cliq_member) %></ul>
<% end %>

<% if @current_user = @cliq.owner %>
<% @cliq.pending_members.each do |pending_member| %>
<ul><%= link_to pending_member.username, user_path %>
<%= link_to "Accept", "/cliqs/:cliq_id/cliq_requests/:id/", :method => :put %>
<%= link_to "Deny", "/cliqs/:cliq_id/cliq_requests/:id/", :method => :delete %>
</ul>
<% end %>
<% end %>

我的路线：

resources :cliqs do
  resources :cliq_requests
end

Answer 1

这些行格式不正确：

<%= link_to 'Request to join Cliq', '/cliqs/:cliq_id/cliq_requests', :method => :post %>
<%= link_to "Accept", "/cliqs/:cliq_id/cliq_requests/:id/", :method => :put %>
<%= link_to "Deny", "/cliqs/:cliq_id/cliq_requests/:id/", :method => :delete %>

我建议您使用路径助手 [例如cliq_cliq_request_path(cliq, cliq_request) 如果您使用足智多谋的路由]。您可以使用 rake routes 寻求帮助。如果您在 development.log 或 test.log 中看到 :cliq_id 和 :id 之类的内容作为被命中的 URL 的一部分，则这些内容应该是数字。您也可以自己插入字符串（例如 "/cliqs/#{cliq_id}/cliq_requests/#{cliq_request.id}"），但这通常需要更多的输入，而且随着时间的推移肯定会更加脆弱。

您的问题之一可能是您正在遍历待定成员名称列表，其中没有正确构成 link 所需的所有数据。所以您的更新操作可能工作正常，但您可能没有向它传递正确的数据。

还有这一行：

if @current_user = @cliq.owner

是一个赋值，因此总是 return 为真。大概你的意思是 ==

nil:NilClass 的未定义方法“cliq_requests”

undefined method `cliq_requests' for nil:NilClass

mysql

activerecord

ruby-on-rails

crud

ruby-on-rails-4