fix(queryinterface): decrement regression (#7960)

Closes #7810

lib/query-interface.js

@@ -685,13 +685,14 @@ class QueryInterface {
     return this.sequelize.query(sql, options);
   }
 
-  decrement(instance, tableName, values, identifier, options) {
-    const sql = this.QueryGenerator.arithmeticQuery('-', tableName, values, identifier, options, options.attributes);
+  decrement(model, tableName, values, identifier, options) {
+    options = Utils.cloneDeep(options);
 
-    options = _.clone(options) || {};
+    const sql = this.QueryGenerator.arithmeticQuery('-', tableName, values, identifier, options, options.attributes);
 
     options.type = QueryTypes.UPDATE;
-    options.instance = instance;
+    options.model = model;
+
     return this.sequelize.query(sql, options);
   }
 

test/integration/instance.test.js

@@ -310,6 +310,16 @@ describe(Support.getTestDialectTeaser('Instance'), () => {
       });
     }
 
+    if (current.dialect.supports.returnValues.returning) {
+      it('supports returning', function() {
+        return this.User.findById(1).then(user1 => {
+          return user1.decrement('aNumber', { by: 2 }).then(() => {
+            expect(user1.aNumber).to.be.equal(-2);
+          });
+        });
+      });
+    }
+
     it('with array', function() {
       const self = this;
       return this.User.findById(1).then(user1 => {