Question

假设我有以下架构：

var schema = {
  fieldOne: Joi.string().required(),
  fieldTwo: Joi.string().required()
};

是否可以设置验证规则，检查两个字段是否具有不同的值？

Answer 1

是的。您可以使用Joi.ref和Joi.invalid（别名为Joi.disallow）来完成此操作。对于您的特定示例，它将是：

var assert = require('assert');
var Joi = require('joi');

var schema = Joi.object().keys({
  fieldOne: Joi.string().required(),
  fieldTwo: Joi.string().disallow(Joi.ref('fieldOne')).required()
});

测试它会让我们得到我们期望的结果：

assert.ok(Joi.validate(4, schema).error !== null);
assert.ok(Joi.validate({ fieldOne: 'a', fieldTwo: 'a' }, schema).error !== null);
assert.ok(Joi.validate({ fieldOne: 'a', fieldTwo: 'b' }, schema).error === null);

它的工作原理是在fieldOne的定义中引用fieldTwo并禁止使用相同的值。

Answer 2

不幸的是，我不确定是否存在针对不同值的直接验证，但您可以尝试使用array#unique()代替：

var xmlreqc=XMLHttpRequest;

XMLHttpRequest = function() {
    this.xhr = new xmlreqc();
    return this;
};

XMLHttpRequest.prototype.open = function (method, url, async) {
return this.xhr.open(method, url, async); //send it on
};

XMLHttpRequest.prototype.setRequestHeader = function(header, value) {
this.xhr.setRequestHeader(header, value);
};

XMLHttpRequest.prototype.getAllResponseHeaders = function() {
console.log( this.xhr.getAllResponseHeaders()); 
return this.xhr.getAllResponseHeaders();
};

XMLHttpRequest.prototype.send = function(postBody) {
     // steal the request 
     nRemAjax++;

    // do the real transmission 
     var myXHR = this;
     this.xhr.onreadystatechange = function() {  myXHR.onreadystatechangefunction();};
     this.xhr.send(postBody);
     };

     XMLHttpRequest.prototype.onreadystatechangefunction = function()
     {      
    try { 
        this.readyState = this.xhr.readyState;
        this.responseText = this.xhr.responseText;
        console.log(this.xhr.responseText); // this line log json data though
        this.responseXML = this.xhr.responseXML;
        this.status = this.xhr.status;  
        this.statusText = this.xhr.statusText;
    }
    catch(e){
    }

    if (this.onreadystatechange)
        this.onreadystatechange();

    //do my logging
    if (this.xhr.readyState == 4)
    {       
            nRemAjax--;
             // only when done steal the response 
             consoleLog("I'm finished");
    }
    };

并在验证前设置var schema = { fieldOne: Joi.string().required(), fieldTwo: Joi.string().required(), fieldOneAndTwo: Joi.array().unique() };。

Joi验证模式 - 两个字段不能具有相同的值

2 个答案: