api-validate

简单的参数验证,验证接口端收到的数据

   var v = require('api-validate');
   var rule = {
     name : {type:'string',match:/tjay/,required:true,msg:'name error'},
	 age : {type:'number',min:1,max:130,required:true,msg:'age error'}//...
   }
   
   v.validate(rule,{
     name:'tjay',
	 age:20
   });// return => [] no error return empty array
   
   v.validate(rule,{
     name:'tjay1',
	 age:-1
   });// return => ['name error','age error'] has error return message array
   
   
   //define diy rule function
   
   v.define('myRuleName',function(arg){
		return function(value){
			return value==null || value == arg;
		};
   });
   
   var rule2 = {
      //msg is message alias,'the Value' is function arg,multi args use [arg1,arg2....]
      name : {type:'string',myRuleName:'the Value',msg:'you error'}
   }
   
   v.validate(rule2,{
     name:'tjay1'
   });// return => ['you error']
   
   v.validate(rule2,{
     name:null
   });// return => []
   
   v.validate(rule2,{
     name:'the Value'
   });// return => []
   
   //use in express
   app.post('/addUser',v.connectValidate(rule2),function(req,res,next){
      //if validate success,the request params in req.validatedParams , if validate fail call next(err)
	  var params = req.validatedParams;
	  userModel.save(params).then(function(){
	     res.end('success');
	  }).catch(function(err){
	      next(err);
	  });
   });