Question

我正在为我的应用程序开发一个基本的私人消息系统。我从中期开始使用this tutorial。

我发现了一个问题。它返回所有会话，而不仅仅是当前用户实际参与的会话。视图仅显示您所在的会话，但所有记录都在那里。显然，如果你有超过少数用户，那就太可怕了。

我已经将控制器调整到我认为的解决方案但我仍然获得所有记录，所以我认为问题出在模型中。

对话控制器

class ConversationsController < ApplicationController

 before_action :authenticate_user!
 before_action :set_conversation, only: [:destroy]

 def index
  @user = current_user
  @conversations = Conversation.where(:sender_id == @user.id || :recipient_id == @user.id)
 end

 def create
  if Conversation.between(params[:sender_id],params[:recipient_id])
   .present?
    @conversation = Conversation.between(params[:sender_id],
     params[:recipient_id]).first
  else
   @conversation = Conversation.create!(conversation_params)
  end

  redirect_to conversation_messages_path(@conversation)

 end

会话模型

class Conversation < ActiveRecord::Base
 belongs_to :sender, :foreign_key => :sender_id, class_name: 'User'
 belongs_to :recipient, :foreign_key => :recipient_id, class_name: 'User'

 has_many :messages, dependent: :destroy

 validates_uniqueness_of :sender_id, :scope => :recipient_id

 scope :between, -> (sender_id,recipient_id) do
  where(sender_id: [sender_id,recipient_id], recipient_id: [sender_id,recipient_id]) 
 end

 def unread_message_nr_for(user_id)
     messages.where('messages.read = ?', false).where('messages.user_id != ?', user_id).count
 end

end

对话视图

  <div class="ibox-content no-side-borders">
      <% @conversations.each do |conversation| %>
      <div class="conversation-member">
       <% if conversation.sender_id == current_user.id || conversation.recipient_id == current_user.id %>
       <% if conversation.sender_id == current_user.id %>
        <% recipient = User.find(conversation.recipient_id) %>
       <% else %>
        <% recipient = User.find(conversation.sender_id) %>
       <% end %>

            <span class="<%= 'current-conversation' if (params['conversation_id'].to_i == conversation.id) %>">
            <% if recipient.avatar.present? %>
            <%= image_tag(recipient.avatar_url(:navigation), class: "img-circle m-r-xs") %>
          <% end %>
              <%= link_to recipient.first_name + " " + recipient.last_name, conversation_messages_path(conversation)%>
            </span>
            <% if conversation.unread_message_nr_for(current_user.id) > 0 %>
              <span class="badge-inline">
                <%= conversation.unread_message_nr_for(current_user.id) %>
              </span> 
            <% end %>
       <% end %>
     </div>
     <% end %>
  </div>

对话架构

  create_table "conversations", force: :cascade do |t|
    t.integer  "sender_id"
    t.integer  "recipient_id"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

如何只获取当前用户为sender_id或recipient_id的会话？

Rails返回所有Conversation记录，而不仅仅是相关记录。

0 个答案: