fix #5300: false and 0 are now properly encoded when using JSON/JSONB

lib/dialects/abstract/query-generator.js

@@ -954,7 +954,7 @@ var QueryGenerator = {
   escape: function(value, field, options) {
     options = options || {};
 
-    if (value) {
+    if (value !== null && value !== undefined) {
       if (value._isSequelizeMethod) {
         return this.handleSequelizeMethod(value);
       } else {

test/unit/sql/json.test.js

@@ -20,11 +20,23 @@ if (current.dialect.supports.JSON) {
         });
 
         test('plain int', function () {
+          expectsql(sql.escape(0, { type: new DataTypes.JSON() }), {
+            default: '\'0\''
+          });
           expectsql(sql.escape(123, { type: new DataTypes.JSON() }), {
             default: '\'123\''
           });
         });
 
+        test('boolean', function () {
+          expectsql(sql.escape(true, { type: new DataTypes.JSON() }), {
+            default: '\'true\''
+          });
+          expectsql(sql.escape(false, { type: new DataTypes.JSON() }), {
+            default: '\'false\''
+          });
+        });
+
         test('NULL', function () {
           expectsql(sql.escape(null, { type: new DataTypes.JSON() }), {
             default: 'NULL'