Consecutive function scopes (#7066)

* add failing unit test

* use .slice instead of .splice to get arguments for scope functions

* add message to changelog.md

changelog.md

@@ -34,6 +34,7 @@
 - [FIXED] Custom error messages used for incorrect eager loading [#7005](https://github.com/sequelize/sequelize/pull/7005)
 - [FIXED] Custom error messages used for incorrect eager loading [#7005](https://github.com/sequelize/sequelize/pull/7005)
 - [FIXED] Enforce unique association aliases [#7025](https://github.com/sequelize/sequelize/pull/7025)
 - [FIXED] Enforce unique association aliases [#7025](https://github.com/sequelize/sequelize/pull/7025)
 - [FIXED] Information warnings when findAll is given incorrect inputs [#7047](https://github.com/sequelize/sequelize/pull/7047)
 - [FIXED] Information warnings when findAll is given incorrect inputs [#7047](https://github.com/sequelize/sequelize/pull/7047)
+- [FIXED] scope method syntax loses parameters when used multiple times [#7058](https://github.com/sequelize/sequelize/issues/7058)
 
 
 ## BC breaks:
 ## BC breaks:
 - `DATEONLY` now returns string in `YYYY-MM-DD` format rather than `Date` type
 - `DATEONLY` now returns string in `YYYY-MM-DD` format rather than `Date` type

lib/model.js

@@ -1303,7 +1303,7 @@ class Model {
         if (!!option.method) {
         if (!!option.method) {
           if (Array.isArray(option.method) && !!self.options.scopes[option.method[0]]) {
           if (Array.isArray(option.method) && !!self.options.scopes[option.method[0]]) {
             scopeName = option.method[0];
             scopeName = option.method[0];
-            scope = self.options.scopes[scopeName].apply(self, option.method.splice(1));
+            scope = self.options.scopes[scopeName].apply(self, option.method.slice(1));
           }
           }
           else if (!!self.options.scopes[option.method]) {
           else if (!!self.options.scopes[option.method]) {
             scopeName = option.method;
             scopeName = option.method;

test/unit/model/scope.test.js

@@ -161,6 +161,21 @@ describe(Support.getTestDialectTeaser('Model'), function() {
       });
       });
     });
     });
 
 
+    it('should work with consecutive function scopes', function () {
+      var scope = {method: ['actualValue', 11]};
+      expect(Company.scope(scope)._scope).to.deep.equal({
+        where: {
+          other_value: 11
+        }
+      });
+
+      expect(Company.scope(scope)._scope).to.deep.equal({
+        where: {
+          other_value: 11
+        }
+      });
+    });
+
     it('should be able to merge two scoped includes', function () {
     it('should be able to merge two scoped includes', function () {
       expect(Company.scope('users', 'projects')._scope).to.deep.equal({
       expect(Company.scope('users', 'projects')._scope).to.deep.equal({
         include: [
         include: [