separated groups and suppliers for material GET

src/models/material.ts

@@ -1,9 +1,11 @@
 import mongoose from 'mongoose';
+import MaterialSupplierModel from '../models/material_suppliers';
+import MaterialGroupsModel from '../models/material_groups';
 
 const MaterialSchema = new mongoose.Schema({
   name: {type: String, index: {unique: true}},
-  supplier: String,
-  group: String,
+  supplier_id: {type: mongoose.Schema.Types.ObjectId, ref: MaterialSupplierModel},
+  group_id: {type: mongoose.Schema.Types.ObjectId, ref: MaterialGroupsModel},
   mineral: String,
   glass_fiber: String,
   carbon_fiber: String,

src/models/material_groups.ts

@@ -0,0 +1,7 @@
+import mongoose from 'mongoose';
+
+const MaterialGroupsSchema = new mongoose.Schema({
+  name: {type: String, index: {unique: true}}
+});
+
+export default mongoose.model('material_groups', MaterialGroupsSchema);

src/models/material_suppliers.ts

@@ -0,0 +1,7 @@
+import mongoose from 'mongoose';
+
+const MaterialSuppliersSchema = new mongoose.Schema({
+  name: {type: String, index: {unique: true}}
+});
+
+export default mongoose.model('material_suppliers', MaterialSuppliersSchema);