Can Strongloop generate string uids?

Question

I want to stop using autogenerated number ids for my models on Strongloop. Can Strongloop generate string uids like e.g. 067e6162-3b6f-4ae2-a171-2470b63dff00?

Answer 1

Yes, strong-loop will generate uuid with uuid function call in model definition. you can use something like below in your model properties.

"id": {
  "type": "string",
  "defaultFn": "uuid"
}

You can check below url to get more info. https://loopback.io/doc/en/lb3/Model-definition-JSON-file.html and https://github.com/strongloop/loopback/issues/292.

Answer 2

You need to modify the .js file along with the .json file. Based on the logic, you can also add a remote method and generate the uuid from node-uuid module.

I'm assuming a User model here and properties of id, name, age and creating an entry into User model.

User.json

{
    "name": "User",
    "properties": {
        "id": {
          "type": "string",
          "id": true,
          "defaultFn": "uuid",
          "required": true
        },
        "name": {
          "type": "string",
          "required": true
        },
        "age": {
          "type": "string",
          "required": true
        }
}

User.js

var uuid = require('node-uuid');
module.exports = function(User) {        
    var userObj = {};
    userObj.id = uuid();
    userObj.name = 'John';
    userObj.age = 22;
    User.create(userObj, function(err, userInstance){
        if (err) {
            console.log(err);
        } else if (userInstance) {
            console.log(userInstance);
        }
    });
}

This will work.