modified example

README.md

@@ -39,7 +39,7 @@ app.post('/signup', function * () {
 		this.body = this.errors;
 		return;
 	}
-	this.body = this.body;
+	this.body = this.request.body;
 });
 app.get('/users', function * () {
 	this.checkQuery('department').empty().in(["sale","finance"], "not support this department!").len(3, 20);	

lib/validate.js

@@ -10,6 +10,11 @@ module.exports = function() {
 	return function * (next) {
 		debug('init koa-validate');
 		this.checkBody = function(key) {
+			if('undefined' == typeof this.request.body) {
+				if(!this.errors){
+					this.errors = ['no body to check'];
+				}
+			}
 			var body =  this.request.body.fields || this.request.body;	// koa-body fileds
 			return new Validator(this, key, body[key], key in body , body );
 		};
@@ -20,6 +25,11 @@ module.exports = function() {
 			return new Validator(this, key, this.params[key], key in this.params,this.params);
 		};
 		this.checkFile = function(key , deleteOnCheckFailed) {
+			if('undefined' == typeof this.request.body || 'undefined' == typeof this.request.body.files ) {
+				if(!this.errors){
+					this.errors = ['no body to check'];
+				}
+			}
 			deleteOnCheckFailed = ('undefined' == typeof deleteOnCheckFailed?true :false);
 			var files = this.request.body.files;
 			return new FileValidator(this, key ,files&&files[key],!!(files&&files[key]) , this.request.body , deleteOnCheckFailed);