add server to monorepo.

packages/server/src/models/ItemWarehouseQuantity.ts

@@ -0,0 +1,35 @@
+import { Model } from 'objection';
+import TenantModel from 'models/TenantModel';
+
+export default class ItemWarehouseQuantity extends TenantModel {
+  /**
+   * Table name.
+   */
+  static get tableName() {
+    return 'items_warehouses_quantity';
+  }
+
+  static get relationMappings() {
+    const Item = require('models/Item');
+    const Warehouse = require('models/Warehouse');
+
+    return {
+      item: {
+        relation: Model.BelongsToOneRelation,
+        modelClass: Item.default,
+        join: {
+          from: 'items_warehouses_quantity.itemId',
+          to: 'items.id',
+        },
+      },
+      warehouse: {
+        relation: Model.BelongsToOneRelation,
+        modelClass: Warehouse.default,
+        join: {
+          from: 'items_warehouses_quantity.warehouseId',
+          to: 'warehouses.id',
+        },
+      },
+    };
+  }
+}