Merge pull request #5280 from renatoelias/fix-hstore-without-model

fix usign hstore without model instance

lib/dialects/postgres/data-types.js

@@ -313,11 +313,19 @@ module.exports = function (BaseTypes) {
   });
 
   HSTORE.parse = function (value) {
+    if (!hstore) {
+      // All datatype files are loaded at import - make sure we don't load the hstore parser before a hstore is instantiated
+      hstore = require('./hstore');
+    }
     return hstore.parse(value);
   };
 
   HSTORE.prototype.escape = false;
   HSTORE.prototype.$stringify = function (value) {
+    if (!hstore) {
+      // All datatype files are loaded at import - make sure we don't load the hstore parser before a hstore is instantiated
+      hstore = require('./hstore');
+    }
     return "'" + hstore.stringify(value) + "'";
   };