Add API endpoing to update an item

app/api/main.py

@@ -86,6 +86,24 @@ def create_item():
     return create_generic_model(Item, mandatory_field='serial_number')
 
 
+@bp.route('/items/<item_id>', methods=['PATCH'])
+@jwt_required
+def patch_item(item_id):
+    data = request.get_json()
+    if data is None:
+        raise utils.InventoryError('Body should be a JSON object')
+    item = Item.query.get(item_id)
+    if item is None:
+        raise utils.InventoryError(f'Unknown item id: {item_id}', status_code=422)
+    item.name = data.get('name', item.name)
+    item.manufacturer = utils.convert_to_model(data.get('manufacturer', item.manufacturer), Manufacturer)
+    item.model = utils.convert_to_model(data.get('model', item.model), Model)
+    item.location = utils.convert_to_model(data.get('location', item.location), Location)
+    item.status = utils.convert_to_model(data.get('status', item.status), Status)
+    db.session.commit()
+    return jsonify(item.to_dict())
+
+
 @bp.route('/manufacturers')
 @jwt_required
 def get_manufacturers():