回送-使用来自MongoDB的自定义字符串ID的GET模型 [英] Loopback - GET model using custom String ID from MongoDB

问题描述

我正在开发具有环回功能的API，一切正常，直到我决定更改数据库中文档的ID.现在，我不希望它们是自动生成的.

I'm developing an API with loopback, everything worked fine until I decided to change the ids of my documents in the database. Now I don't want them to be auto generated.

现在，我自己设置ID.每当我点击以下端点时，我都会得到未知ID" 404:GET properties/{id}

Now that I'm setting the Id myself. I get an "Unknown id" 404, whenever I hit this endpoint: GET properties/{id}

如何在回送和mongodb中使用自定义ID?

How can I use custom IDs with loopback and mongodb?

每当我达到此终点时:http://localhost:5000/api/properties/20020705171616489678000000 我收到此错误:

Whenever I hit this endpoint: http://localhost:5000/api/properties/20020705171616489678000000 I get this error:

{
  "error": {
    "name": "Error",
    "status": 404,
    "message": "Unknown \"Property\" id \"20020705171616489678000000\".",
    "statusCode": 404,
    "code": "MODEL_NOT_FOUND"
  }
}

这是我的model.json，以防万一...

This is my model.json, just in case...

{
  "name": "Property",
  "plural": "properties",
  "base": "PersistedModel",
  "idInjection": false,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "id": {"id": true, "type": "string", "generated": false},
    "photos": {
      "type": [
        "string"
      ]
    },
    "propertyType": {
      "type": "string",
      "required": true
    },
    "internalId": {
      "type": "string",
      "required": true
    },
    "flexCode": {
      "type": "string",
      "required": true
    }

  },
  "validations": [],
  "relations": {},
  "acls": [],
  "methods": []
}

推荐答案

当我尝试使用带有文本ID字段的较小数字的PostGreSQL DB安装程序时，您的模型设置(与idInjection: true或false一起使用)可以正常工作

Your model setup (with with idInjection: true or false) did work when I tried it with a PostGreSQL DB setup with a text id field for smaller numbers.

使用DEBUG=loopback:connector:* node .运行回送应用程序将输出在终端中运行的数据库查询-我尝试使用您正在尝试的id值来尝试它，并且参数值是[2.002070517161649e+25]，所以数字的大小是个问题.

Running a Loopback application with DEBUG=loopback:connector:* node . outputs the database queries being run in the terminal - I tried it with the id value you are trying and the parameter value was [2.002070517161649e+25], so the size of the number is the issue.

您可以尝试将其作为Loopback中的错误进行举报，但是JS处理大量数字很可怕，因此最好还是不要使用诸如标识符之类的大量数字.

You could try raising it as a bug in Loopback, but JS is horrible at dealing with large numbers so you may be better off not using such large numbers as identifiers anyway.

如果ID是一个超过16个字符的字母数字字符串，它确实可以工作，因此可能要为您解决(使用ObjectId?)，具体取决于您要实现的目标.

It does work if the ID is an alphanumeric string over 16 characters so there might be a work around for you (use ObjectId?), depending on what you are trying to achieve.

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