loopback/test/fixtures/user-integration-app/common/models/blog.json

{
  "name": "blog",
  "base": "PersistedModel",
  "properties": {
    "title": {
      "type": "string"
    },
    "content": {
      "type": "string"
    }
  },
  "relations": {
    "user": {
      "type": "belongsTo",
      "model": "myUser"
    }
  }
}