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我是一个 Rails 新手，我遇到了一个我无法超越的问题。我已经查看了所有内容，但找不到有效的答案。我有一个允许用户建立友谊的应用程序。那部分工作得很好。然而，我最近通过将朋友加入圈子（有点像 Google+）为友谊增加了另一个层次。我遇到的问题是圆圈没有保存在数据库中。以下是正在发生的事情：

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]]

这是表格：

<%= 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。对于我的生活，我无法弄清楚这里出了什么问题。表格上没有错误，友谊仍然保存，只是没有圈子。我可能做错了什么？

（如果您需要更多信息，请告诉我）

编辑 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
4

2 回答 2

1

为什么它不保存的简单答案circle_id是你从不使用它。

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

但你永远不会对此做任何事情。

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

然后从控制器传入

于 2013-01-06T19:51:49.197 回答
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我认为参数是 params[:user_friendship][:circle_id] 并检查您是否使用此参数保存 circle_id。还要检查从视图中获得的 circle_id 是否是“整数”类型。

于 2013-01-07T16:17:26.503 回答