Question

我是铁杆新手，我遇到了一个我无法超越的问题。我看了很多，但找不到有效的答案。我有一个允许用户友谊的应用程序。那部分工作正常。然而，我最近通过将朋友圈成圈子（有点像Google+）为友谊增添了另一个层次。我遇到的问题是圈子没有保存在数据库中。以下是对正在发生的事情的看法：

Processing by UserFriendshipsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"cupb6S+IdrxqSuEqgfqehJh++POHUMQQ9QqbQVrGtHk=", "user_friendship"=>{"circle_id"=>"9", "friend_id"=>"jimbo"}, "commit"=>"Yes, Add Friend"}
User Load (0.2ms)  SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1
User Load (0.1ms)  SELECT "users".* FROM "users" WHERE "users"."profile_name" = 'jimbo'     LIMIT 1
(0.0ms)  begin transaction
SQL (0.7ms)  INSERT INTO "user_friendships" ("circle_id", "created_at", "friend_id", "state", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?, ?)  [["circle_id", nil], ["created_at", Sun, 06 Jan 2013 17:40:30 UTC +00:00], ["friend_id", 2], ["state", "pending"], ["updated_at", Sun, 06 Jan 2013 17:40:30 UTC +00:00], ["user_id", 1]]
SQL (0.2ms)  INSERT INTO "user_friendships" ("circle_id", "created_at", "friend_id", "state", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?, ?)  [["circle_id", nil], ["created_at", Sun, 06 Jan 2013 17:40:30 UTC +00:00], ["friend_id", 1], ["state", "requested"], ["updated_at", Sun, 06 Jan 2013 17:40:30 UTC +00:00], ["user_id", 2]]

以下是表格：

<%= simple_form_for @user_friendship, method: :post do |f| %>
<div class="form-inputs">
  <%= f.collection_select :circle_id, current_user.circles.all(:order => 'name'), :id, :name %>
</div>
<div class="form form-actions">
  <%= f.hidden_field :friend_id, value: @friend.profile_name %>
  <%= f.button :submit, "Yes, Add Friend", class: 'btn btn-primary' %>
  <%= link_to "Cancel", profile_path(@friend), class: 'btn' %>
</div>
<% end %>

以下是关联：

class UserFriendship < ActiveRecord::Base
  belongs_to :circle

class Circle < ActiveRecord::Base
  has_many :friends, through: :user_friendships

在用户到达表单之前已经创建了圆圈。我已经通过迁移将circle_id添加到user_friendships表中，因此可以保存id的位置。对于我的生活，我无法弄清楚这里出了什么问题。表单上没有错误，友谊仍然只保存不是圆圈。我能做错什么？

（如果您需要更多信息，请告诉我）

修改这是控制器动作

def create
  if params[:user_friendship] && params[:user_friendship].has_key?(:friend_id)
    @friend = User.where(profile_name: params[:user_friendship][:friend_id]).first
    @user_friendship = UserFriendship.request(current_user, @friend)
    if @user_friendship.new_record?
      flash[:error] = "There was problem creating that friend request."
    else
      flash[:success] = "Friend request sent."
    end
    redirect_to profile_path(@friend)
  else
    flash[:error] = "Friend required"
    redirect_to root_path
  end
end

这是user_friendships表：

  create_table "user_friendships", :force => true do |t|
    t.integer  "user_id"
    t.integer  "friend_id"
    t.datetime "created_at", :null => false
    t.datetime "updated_at", :null => false
    t.string   "state"
    t.integer  "circle_id"
  end

  add_index "user_friendships", ["circle_id"], :name => "index_user_friendships_on_circle_id"
  add_index "user_friendships", ["state"], :name => "index_user_friendships_on_state"
  add_index "user_friendships", ["user_id", "friend_id"], :name => "index_user_friendships_on_user_id_and_friend_id"

这是请求方法：

  def self.request(user1, user2)
    transaction do
      friendship1 = create!(user: user1, friend: user2, state: 'pending')
      friendship2 = create!(user: user2, friend: user1, state: 'requested')

      friendship1.send_request_email
      friendship1
    end
  end

Answer 1

为什么它不保存circle_id的简单答案是你永远不会使用它。

从您向我们展示的日志消息中，它以params[:user_friendship][:circle_id]

的形式出现

但你从不对此做任何事情。

我建议进行以下更改

def self.request(user1, user2, circle)
  transaction do
    friendship1 = create!(user: user1, friend: user2, state: 'pending', circle: circle)
    friendship2 = create!(user: user2, friend: user1, state: 'requested', circle: circle)

    friendship1.send_request_email
    friendship1
  end
end

然后从控制器传递它

Answer 2

我认为参数是params [：user_friendship] [：circle_id]，并检查是否使用此参数保存circle_id。还要检查从视图中获取的circle_id是否为“整数”类型。

在Rails中不保存ID

2 个答案: