Merge pull request #1034 from strongloop/err_connector_not_implements_replaceById

Return error if the connector does not implement

lib/dao.js

@@ -2638,8 +2638,14 @@ DataAccessObject.replaceById = function(id, data, options, cb) {
   assert(typeof cb === 'function', 'The cb argument must be a function');
 
   var connector = this.getConnector();
-  assert(typeof connector.replaceById === 'function',
-          'replaceById() must be implemented by the connector');
+
+  if (typeof connector.replaceById !== 'function') {
+    var err = new Error(g.f(
+      'The connector %s does not support {{replaceById}} operation. This is not a bug in LoopBack. ' +
+      'Please contact the authors of the connector, preferably via GitHub issues.',
+      connector.name));
+    return cb(err);
+  }
 
   var pkName = idName(this);
   if (!data[pkName]) data[pkName] = id;