环回模型不更新 - 环回：错误：没有为ChatMessage模型定义关系“chatroomID”

Question

我查看了文档和github问题。

https://loopback.io/doc/en/lb2/HasMany-relations.html

https://github.com/strongloop/loopback-datasource-juggler/issues/76

hasMany relation: including from the other direction

我不能把我的手指上为什么我收到错误：Error: Relation "chatroomID" is not defined for ChatMessage model

看来，即使我正确的编辑我的JSON，我的聊天室模型没有更新（如在REST资源管理器中看到的）

但chatmessage没有管理更新

---

聊天的message.json

{ 
    "name": "ChatMessage", 
    "base": "PersistedModel", 
    "idInjection": true, 
    "options": { 
    "relations": { 
     "ChatRoom": { 
     "type": "belongsTo", 
     "model": "ChatRoom", 
     "foreignKey": "chatroomID" 
     }, 

... 

聊天room.json

{ 
    "name": "ChatRoom", 
    "base": "PersistedModel", 
    "idInjection": true, 
    "options": { 
    "relations": { 
     "chatMessages": { 
     "type": "hasMany", 
     "model": "ChatMessages", 
     "foreignKey": "chatMessagesID" 
     } 
    } 
    }, 
... 

在控制器：

function getMsgs() { 
    // http://loopback.io/doc/en/lb2/Include-filter.html 
    return (
    ChatMessage.find({ 
     "filter": { 
     "include": { 
      "relation": "chatroomID", 
      "scope": { 
       "include": ["ChatRoom"] 
      } 
     } 
     } 

}) 

Answer 1

在比迪烟的关系外键应该是相同的。

另请注意，您将关系模型设置为错误。这是ChatMessage不ChatMessages（的“s”） 变化是这样的：

//chat-room.json 
{ 
    "name": "ChatRoom", 
    "base": "PersistedModel", 
    "idInjection": true, 
    "options": { 
    "relations": { 
     "chatMessages": { 
     "type": "hasMany", 
     "model": "ChatMessage", 
     "foreignKey": "chatroomID" 
     } 
    } 
    }, 
... 

但你得到的错误是因为包括没有定义关系，你没有chatroomID关系。你有chatMessages的关系。

因此改变它想：

ChatRoom.find({ 
     "filter": { 
     "include": { 
      "relation": "chatMessages" 
     } 
     }