Add checkFieldAndIndex (#87)

* Add checkFieldAndIndex

lib/sql.js

@@ -216,6 +216,10 @@ SQLConnector.prototype.alterTable = function(model, fields, indexes, cb) {
   throw new Error(g.f('{{alterTable()}} must be implemented by the connector'));
 };
 
+SQLConnector.prototype.checkFieldAndIndex = function(fields, indexes) {
+  return true;
+};
+
 /**
  * Get the status of a table
  * @param {String} model The model name
@@ -233,7 +237,7 @@ SQLConnector.prototype.getTableStatus = function(model, cb) {
       if (err) return cb(err);
       indexes = data;
 
-      if (fields && indexes)
+      if (self.checkFieldAndIndex(fields, indexes))
         return cb(null, fields, indexes);
     });
   });