fix: escape dollarsign in sequelize.fn related to issue 11533

lib/dialects/abstract/query-generator.js

@@ -943,7 +943,6 @@ class QueryGenerator {
         }
       }
     }
-
     return SqlString.escape(value, this.options.timezone, this.dialect);
   }
 
@@ -2134,7 +2133,7 @@ class QueryGenerator {
         if (_.isPlainObject(arg)) {
           return this.whereItemsQuery(arg);
         }
-        return this.escape(arg);
+        return this.escape(typeof arg === 'string' ? arg.replace('$', '$$$') : arg);
       }).join(', ')})`;
     }
     if (smth instanceof Utils.Col) {

test/integration/instance/save.test.js

@@ -428,6 +428,17 @@ describe(Support.getTestDialectTeaser('Instance'), () => {
       });
     });
 
+    it('updates with function that contains escaped dollar symbol', function() {
+      return this.User.create({}).then(user => {
+        user.username = this.sequelize.fn('upper', '$sequelize');
+        return user.save().then(() => {
+          return this.User.findByPk(user.id).then(userAfterUpdate => {
+            expect(userAfterUpdate.username).to.equal('$SEQUELIZE');
+          });
+        });
+      });
+    });
+
     describe('without timestamps option', () => {
       it("doesn't update the updatedAt column", function() {
         const User2 = this.sequelize.define('User2', {

test/integration/model/create.test.js

@@ -880,6 +880,16 @@ describe(Support.getTestDialectTeaser('Model'), () => {
       });
     });
 
+    it('should escape $ in sequelize functions arguments', function() {
+      return this.User.create({
+        secretValue: this.sequelize.fn('upper', '$sequelize')
+      }).then(user => {
+        return this.User.findByPk(user.id).then(user => {
+          expect(user.secretValue).to.equal('$SEQUELIZE');
+        });
+      });
+    });
+
     it('should work with a non-id named uuid primary key columns', function() {
       const Monkey = this.sequelize.define('Monkey', {
         monkeyId: { type: DataTypes.UUID, primaryKey: true, defaultValue: DataTypes.UUIDV4, allowNull: false }

test/unit/dialects/abstract/query-generator.test.js

@@ -98,6 +98,12 @@ describe('QueryGenerator', () => {
       QG.handleSequelizeMethod(this.sequelize.where(this.sequelize.col('foo'), Op.not, null))
         .should.be.equal('foo IS NOT NULL');
     });
+
+    it('should correctly escape $ in sequelize.fn arguments', function() {
+      const QG = getAbstractQueryGenerator(this.sequelize);
+      QG.handleSequelizeMethod(this.sequelize.fn('upper', '$user'))
+        .should.include('$$user');
+    });
   });
 
   describe('format', () => {