[英]How provide dynamic message in custom loopback validation?
下面是从文档:
User.validate('name', customValidator, {message: 'Bad name'});
function customValidator(err) {
if (this.name === 'bad') err();
});
var user = new User({name: 'Peter'});
user.isValid(); // true
user.name = 'bad';
user.isValid(); // false
有没有办法在验证期间修改message
变量? 例如, this.name === 'bad'
消息是Bad name
但是当this.name === 'very bad'
,消息应该是Very Bad name
。 如何做到这一点?
突然有一个带有签名errors.add(attr, message, code)
的addError
方法,所以:
User.validate('name', customValidator);
function customValidator(err) {
if (this.name === 'bad') {
this.errors.add('name', `Name is bad`, 'name.bad')
err();
}
if (this.name === 'very bad') {
this.errors.add('name', `Name is very bad`, 'name.very.bad')
err();
}
});
这error.details.codes.name
,但是请记住,您将获得+1 custom
代码和消息,请参阅下面的json error.details.codes.name
和error.details.messages.name
路径:
{
"error": {
"statusCode": 422,
"name": "ValidationError",
"message": "The `Entity` instance is not valid. Details: `name` Name is very bad (value: very bad).",
"details": {
"context": "Entity",
"codes": {
"name": [
"name.very.bad",
"custom"
],
},
"messages": {
"name": [
"Name is very bad",
"is invalid"
]
}
},
"stack": "..."
}
}
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