package.json

 {
   "name": "laboite-blog-backend",
-  "version": "1.4.0",
+  "version": "1.5.0-testing.1",
   "license": "EUPL-1.2",
   "description": " API backend for laboite blog service",
   "author": "EOLE/PCLL <team@eole.education> - DINUM",

src/models/group-item.model.ts

-import {model, property, Entity, belongsTo} from '@loopback/repository';
-import {Group} from './group.model';
+import {Entity, model, property} from '@loopback/repository';
 
 @model()
 export class GroupItem extends Entity {
@@ -13,6 +12,11 @@ export class GroupItem extends Entity {
   })
   name: string;
 
+  @property({
+    type: 'number',
+  })
+  type: number;
+
   constructor(data?: Partial<GroupItem>) {
     super(data);
   }

src/models/group.model.ts

-import { Entity, model, property } from '@loopback/repository';
+import {Entity, model, property} from '@loopback/repository';
 
 @model({
   settings: {
     strict: true,
     idInjection: false,
-    mongodb: { collection: 'groups' }, // custom names
+    mongodb: {collection: 'groups'}, // custom names
   },
 })
 export class Group extends Entity {
@@ -37,6 +37,10 @@ export class Group extends Entity {
   })
   slug: string;
 
+  @property({
+    type: 'number',
+  })
+  type: number;
 
   constructor(data?: Partial<Group>) {
     super(data);