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

我无法理解为什么我收到错误：Error: Relation "chatroomID" is not defined for ChatMessage model

似乎即使我正确编辑了我的json，我的聊天室模型也没有更新（如REST浏览器中所示）

但是chatmessage确实设法更新了

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"
      }
    }
  },
...

在控制器中：

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

})

Answer 1

在双向关系中，外键应该相同。

另请注意，您将关系模型设置为错误。它是ChatMessages而非//chat-room.json { "name": "ChatRoom", "base": "PersistedModel", "idInjection": true, "options": { "relations": { "chatMessages": { "type": "hasMany", "model": "ChatMessage", "foreignKey": "chatroomID" } } }, ... （'s'） 改变如下：

chatroomID

但是你得到的错误是因为包含未定义的关系，你没有chatMessages关系。您有ChatRoom.find({ "filter": { "include": { "relation": "chatMessages" } } 关系。

所以改变它：

{{1}}