Added includeEmptyFields option to allow blank submitted values to st…

…ill be applied to req.body.

README.md

@@ -64,6 +64,7 @@ The following are the options that can be passed to Multer.
 * `onFilesLimit()`
 * `onFieldsLimit()`
 * `onPartsLimit()`
+* `includeEmptyFields`
 
 Apart from these, Multer also supports more advanced [busboy options](https://github.com/mscdex/busboy#busboy-methods) like `highWaterMark`, `fileHwm`, and `defCharset`.
 
@@ -236,6 +237,16 @@ onPartsLimit: function () {
 }
 ```
 
+### includeEmptyFields
+
+A Boolean value to specify whether empty submitted values should be applied to req.body.
+
+Defaults to false;
+
+```js
+includeEmptyFields: true
+```
+
 ## License (MIT)
 
 Copyright (c) 2014 Hage Yaapa <[http://www.hacksparrow.com](http://www.hacksparrow.com)>

index.js

@@ -9,6 +9,7 @@ var qs = require('qs');
 module.exports = function(options) {
 
   options = options || {};
+  options.includeEmptyFields = options.includeEmptyFields || false;
 
   // specify the destination directory, else, the uploads will be moved to the temporary dir of the system
   var dest;
@@ -52,8 +53,9 @@ module.exports = function(options) {
       // handle text field data
       busboy.on('field', function(fieldname, val, valTruncated, keyTruncated) {
 
-        // don't attach to the body object, if there is no value
-        if (!val) return;
+        // if includeEmptyFields is false and there is no value then don't
+        // attach the fields to req.body
+        if (!options.includeEmptyFields && !val) return;
 
         if (req.body.hasOwnProperty(fieldname) && val) {
           if (Array.isArray(req.body[fieldname])) {