Merge pull request #91 from strongloop/feature/fix-isNewInstance

Return isNewInstance from upsert

lib/mysql.js

@@ -254,11 +254,19 @@ MySQL.prototype.updateOrCreate = MySQL.prototype.save = function (model, data, c
   sql += ' VALUES (' + fieldValues.join(', ') + ')';
   sql += ' ON DUPLICATE KEY UPDATE ' + combined.join(', ');
 
-  this.query(sql, function (err, info) {
+  this.query(sql, function(err, info) {
     if (!err && info && info.insertId) {
       data.id = info.insertId;
     }
-    callback(err, data);
+    var meta = {};
+    if (info) {
+      // When using the INSERT ... ON DUPLICATE KEY UPDATE statement,
+      // the returned value is as follows:
+      // 1 for each successful INSERT.
+      // 2 for each successful UPDATE.
+      meta.isNewInstance = (info.affectedRows === 1);
+    }
+    callback(err, data, meta);
   });
 };