我正在使用“express-validator”中间件来验证表单。因为我正在使用模式验证，并且我有一些异步任务来验证，第一个是电子邮件验证，下一个是用户名验证。一些我如何在正确工作方面取得进展。
但是我无法根据不同的条件设置正确的错误消息。因此，当您在 DNS 中的电子邮件无效时查看我的代码时，它应该显示“不是有效的电子邮件”，但它始终显示“此电子邮件已在使用中”，用户名字段也是如此。当我不输入任何内容时，用户名错误显示“此用户名已被使用”，当我输入超过 25 个字符时，它显示“请输入用户名”
所以请指导我如何纠正这个问题并获得所需的错误消息。
var validation_rules = checkSchema({
company_name: {
errorMessage: 'Company Name should be at least 3 chars long and maximum of 50 chars',
isLength: {
options: { min: 3, max : 50 }
},
trim: true
},
profile_name: {
errorMessage: 'Public Profile Name should be at least 3 chars long and maximum of 50 chars',
isLength: {
options: { min: 3, max: 50 }
},
trim: true
},
description: {
errorMessage: 'Company Description should be at least 2 chars long and maximum of 200 chars',
isLength: {
options: { min: 2, max: 200 }
},
trim: true
},
company_street_address: {
errorMessage: 'Company Address should be at least 3 chars long and maximum of 100 chars',
isLength: {
options: { min: 3, max: 100 }
},
trim: true
},
company_city: {
errorMessage: 'City should be at least 5 chars long and maximum of 50 chars',
isLength: {
options: { min: 5, max: 50 }
},
trim: true
},
company_state: {
errorMessage: 'Please select state',
matches: {
options: [/^[0-9]+$/],
errorMessage: "Please enter digits"
},
trim: true
},
company_zip: {
errorMessage: 'Zip Code should be at least 4 chars long and maximum of 6 chars',
isLength: {
options: { min: 4, max: 6 }
},
trim: true
},
first_name: {
errorMessage: 'First Name should be at least 3 chars long and maximum of 50 chars',
isLength: {
options: { min: 3, max: 50 }
},
trim: true
},
last_name: {
errorMessage: 'Last Name should be at least 3 chars long and maximum of 50 chars',
isLength: {
options: { min: 3, max: 50 }
},
trim: true
},
email: {
errorMessage: 'Please enter a valid email address',
isEmail : true,
trim: true,
custom: {
options: (value) => {
if(value)
{
return new Promise(function (resolve, reject) {
dns_validate_email.validEmail(value, function(valid) {
console.log('valid:'+valid);
if (valid) {
resolve(value)
}else{
reject(new Error({errorMessage: 'Not a valid email'}));
}
});
}).then(function (email) {
return new Promise(function (resolve, reject) {
User.findBy('email', email, function (err, result) {
if(err){
reject('Unable to validate email')
}else{
console.log(result);
resolve(result);
}
});
}).then(function(result){return result.length===0});
})
}
},
errorMessage: 'This email is already in use',
}
},
phone: {
errorMessage: 'Please enter Phone Number in 10 digits',
isLength: {
options: { min: 10, max: 10 }
},
matches: {
options: [/^\d{10}$/],
errorMessage: "Please enter digits"
},
trim: true
},
street_address: {
errorMessage: 'Company Address should be at least 3 chars long and maximum of 100 chars',
isLength: {
options: { min: 3, max: 100 }
},
trim: true
},
city: {
errorMessage: 'City should be at least 5 chars long and maximum of 50 chars',
isLength: {
options: { min: 5, max: 50 }
},
trim: true
},
state: {
errorMessage: 'Please select state',
matches: {
options: [/^[0-9]+$/],
errorMessage: "Please enter digits"
},
trim: true
},
zip: {
errorMessage: 'Zip Code should be at least 4 chars long and maximum of 6 chars',
isLength: {
options: { min: 4, max: 6 }
},
trim: true
},
username: {
errorMessage: 'Please enter username',
isLength: {
options: { max: 25 },
errorMessage: 'Username should not be greater than 25 chars',
},
trim: true,
custom: {
options: (value) => {
console.log(value.length)
if(value.length>0)
{
return new Promise(function (resolve, reject) {
User.findBy('username', value, function (err, record) {
if (err) {
reject('Error validating username');
}else{
console.log('--------'+record)
resolve(record)
}
});
}).then(function (result) {
return result.length===0;
})
}
},
errorMessage: 'This username is already in use',
}
},
password: {
isLength: {
errorMessage: 'Password should be at least 6 chars long',
// Multiple options would be expressed as an array
options: { min: 6 }
}
},
confirm_password: {
errorMessage: 'Must have the same value as the password field',
custom: {
options: (value, { req }) => value === req.body.password
}
},
payment_mode:{
errorMessage: 'Please select payment option',
isIn: {
options: [['Credit Card', 'Monthly Invoice']],
}
},
// Wildcards/dots for nested fields work as well
'card.number': {
errorMessage: 'Please enter card number',
custom: {
options: (value, { req }) => {
if(req.body.payment_mode==="Credit Card"){
return /^[0-9]{12,19}$/.test(value);
}else{
return true;
}
},
errorMessage: 'Card number must be of 12 and maximum of 19 digits',
}
},
'card.type': {
errorMessage: 'Please select card type',
custom: {
options: (value, { req }) => (req.body.payment_mode==="Credit Card" && value=='')?false:true,
}
},
'card.exp_month': {
errorMessage: 'Please select expiration month',
custom: {
options: (value, { req }) => (req.body.payment_mode==="Credit Card" && value=='')?false:true,
},
trim :true
},
'card.exp_year': {
errorMessage: 'Please select expiration year',
custom: {
options: (value, { req }) => (req.body.payment_mode==="Credit Card" && value=='')?false:true,
},
trim :true
},
// Wildcards/dots for nested fields work as well
'card.cvv': {
errorMessage: 'Please enter card number',
custom: {
options: (value, { req }) => {
if(req.body.payment_mode==="Credit Card"){
return /^[0-9]{3,4}$/.test(value);
}else{
return true;
}
},
errorMessage: 'Security code number must be of 3 and maximum of 4 digits',
}
}
});