Add optional models argument to autoupdate

lib/mysql.js

@@ -394,11 +394,23 @@ MySQL.prototype.all = function all(model, filter, callback) {
 
 };
 
-MySQL.prototype.autoupdate = function (cb) {
+MySQL.prototype.autoupdate = function (models, cb) {
     var self = this;
     var wait = 0;
-    Object.keys(this._models).forEach(function (model) {
+    if ((!cb) && ('function' === typeof models)) {
-        wait += 1;
+        cb = models;
+        models = undefined;
+    }
+    // First argument is a model name
+    if ('string' === typeof models) {
+        models = [models];
+    }
+
+    models = models || Object.keys(this._models);
+
+    models.forEach(function (model) {
+        if (model in self._models) {
+            wait++;
             self.query('SHOW FIELDS FROM ' + self.tableEscaped(model), function (err, fields) {
                 self.query('SHOW INDEXES FROM ' + self.tableEscaped(model), function (err, indexes) {
                     if (!err && fields.length) {
@@ -408,11 +420,12 @@ MySQL.prototype.autoupdate = function (cb) {
                     }
                 });
             });
+        }
     });
 
     function done(err) {
         if (err) {
-            console.log(err);
+            console.error(err);
         }
         if (--wait === 0 && cb) {
             cb();