CODEWITHSUNDEEP
loopbackjsstrongloop
Sam
Sam

Reputation: 1296

Can I use non-sequential id for loopback model?

Loopback uses sequential number for model ID. Can I use my own ID generator on server side? How do I go about doing that?

Upvotes: 9

Views: 4546

Answers (3)

erevos13
erevos13

Reputation: 411

If you use Loopback 4 then this is the setting for generating UUID in prime key. Inside you Model change this.

@property({
type: 'string',
id: true,
defaultFn: 'uuidv4',

}) id?: string;

This is the way to gen a unique id in your table.

Upvotes: 2

Ivan Schwarz
Ivan Schwarz

Reputation: 814

It is possible to specify Loopback generators (guid, uuid, ...) as a default function for id properties in your model definition file.

example with guid:

{
  "name": "ModelName",
  "base": "PersistedModel",
  "idInjection": false,
  "properties": {
    "id": {
      "type": "string",
      "id": true,
      "defaultFn": "guid"
    }
  },
  "validations": [],
  "relations": {},
  "acls": [],
  "methods": {}
}

As far as I know, you can't specify there your own default function yet. See related github issue.

If you want more advanced behavior (e.g. your own generator), you can create models/model-name.js file and extend a constructor of your model.

Upvotes: 10

amuramoto
amuramoto

Reputation: 2848

Yes, you would need to do a few things:

Upvotes: 4

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