Question

插入following_id时出错，然后检查了development.log：

这是我的错误：follower_id = nil

[1m[35mUser Load (0.0ms)[0m  SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 9]]
[1m[36mUser Load (1.0ms)[0m  [1mSELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1[0m  [["id", "11"]]
[1m[36mSQL (3.0ms)[0m  [1mINSERT INTO "relations" ("created_at", "follower_id", "following_id", "updated_at") VALUES (?, ?, ?, ?)[0m  [["created_at", Thu, 23 Oct 2014 07:19:22 UTC +00:00], ["follower_id", nil], ["following_id", 11], ["updated_at", Thu, 23 Oct 2014 07:19:22 UTC +00:00]]

我想成为：follower_id = 9，在第1行和第2行之间改变

[1m[36mUser Load (0.0ms)[0m  [1mSELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1[0m  [["id", "9"]]
[1m[35mUser Load (0.0ms)[0m  SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", "11"]]
[1m[36mSQL (3.0ms)[0m  [1mINSERT INTO "relations" ("created_at", "follower_id", "following_id", "updated_at") VALUES (?, ?, ?, ?)[0m  [["created_at", Thu, 23 Oct 2014 07:19:22 UTC +00:00], ["follower_id", 9], ["following_id", 11], ["updated_at", Thu, 23 Oct 2014 07:19:22 UTC +00:00]]`

那么，我怎样才能将其更改为真？我的代码出了点问题？请帮助我！

*这是我的用户模型

class User < ActiveRecord::Base
 attr_accessible :pass, :username
  # Who am I following?
  has_many :relations, :foreign_key => :follower_id
  has_many :following, :through => :relations 
  # Who am I followed by?
  has_many :relations, :class_name => "Relation", :foreign_key => :following_id
  has_many :followers, :through => :relations

  validates :username, :pass, :presence => true
  validates :username, :pass, :length => { :minimum => 4 }
  validates :username, :uniqueness => true

*关系模型

class Relation < ActiveRecord::Base
  belongs_to :follower, :class_name => "User"
  belongs_to :following, :class_name => "User"
end

*关系控制器

 class RelationController < ApplicationController
  def create
    follow = User.find(params[:relation][:following_id])
    @current_user.following << follow
    redirect_to follow
  end

*我的ApplicationController

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  include WelcomeHelper
  before_filter :set_current_user

  private

  def set_current_user
    @current_user = User.find(session[:user_id]) if session[:user_id]
  end
end

*我的行动观点

<h2><%= @user.username%><br /></h2>
<%= @user.pass%><br />
<% if  @current_user && @current_user != @user %>
  <% if @current_user.following.include?(@user) %>
    <%= link_to "Unfollow", 
      relation_path(@current_user.relation_for(@user)), 
      :method => :delete %>
  <% else %>
    <%= form_for @relation do |f| %>
      <%= f.hidden_field :following_id, :value => @user.id %>
      <%= f.submit "Follow" %>
    <% end %>
  <% end %>
<% end %>
<br>
<ul>
  <% @user.following.each do |u| %>
    <li><%= link_to u.username, u %></li>
  <% end %>
</ul>
Followed By
<ul>
  <% @user.followers.each do |u| %>
    <li><%= link_to u.username, u %></li>
  <% end %>
</ul>

这是我插入following_id

的动作

def create
    follow = User.find(params[:relation][:following_id])
    @current_user.following << follow
    redirect_to follow
  end

已发送我的following_id

{"utf8"=>"✓",
 "authenticity_token"=>"DIY42kGR9fZ54Pub+CDMuNNaHZ0aFnzSiWrkOFRBsdE=",
 "relation"=>{"following_id"=>"11"},
 "commit"=>"Follow"}

如何改变发展？

0 个答案: