chore: add deprecation warnings to event emitter style callbacks, closes #2280

lib/promise.js

@@ -3,7 +3,13 @@
 var Promise = require('sequelize-bluebird')
   , EventEmitter = require('events').EventEmitter
   , proxyEventKeys = ['success', 'error', 'sql']
-  , Utils = require('./utils');
+  , Utils = require('./utils')
+  , seen = {}
+  , deprecated = function(message) {
+    if (seen[message]) return;
+    console.warn(message);
+    seen[message] = true;
+  };
 
 /**
  * A slightly modified version of bluebird promises. This means that, on top of the methods below, you can also call all the methods listed on the link below.
@@ -75,6 +81,7 @@ SequelizePromise.prototype.emit = function(evt) {
  */
 SequelizePromise.prototype.success =
 SequelizePromise.prototype.ok = function(fct) {
+  deprecated('EventEmitter#success|ok is deprecated, please use promise-style instead.');
   if (fct.length > 1) {
     return this.spread(fct);
   } else {
@@ -100,6 +107,7 @@ SequelizePromise.prototype.ok = function(fct) {
 SequelizePromise.prototype.failure =
 SequelizePromise.prototype.fail =
 SequelizePromise.prototype.error = function(fct) {
+  deprecated('EventEmitter#failure|fail|error is deprecated, please use promise-style instead.');
   return this.then(null, fct);
 };
 
@@ -126,6 +134,7 @@ SequelizePromise.prototype.complete = function(fct) {
   }
 
   if (fct.length > 2) {
+    deprecated('EventEmitter#complete|done is deprecated, please use promise-style instead.');
     return this.spread(function() {
       fct.apply(null, [null].concat(Array.prototype.slice.call(arguments)));
     }, fct);