我是NodeJS和Express的新手，我想验证API参数。现在，我通过以下方式验证参数：
if(!req.body.parametername)
return res.send({"message": "Please provide parametername"});
if(!req.body.parametername)
return res.send({"message": "parametername can not be blank"});
但我希望响应如下：
{
"username": [
"This field is required."
],
"password": [
"This field can not be blank."
]
}
如果参数无效或未提供，这是我想要的响应。
您可能会在这里找到express-validator。特别是本节：
req.assert('email', 'required').notEmpty();
req.assert('email', 'valid email required').isEmail();
req.assert('password', '6 to 20 characters required').len(6, 20);
var errors = req.validationErrors(); // Or req.asyncValidationErrors();
var mappedErrors = req.validationErrors(true); // Or req.asyncValidationErrors(true);
mapdErrors将如下所示：
{
email: {
param: "email",
msg: "valid email required",
value: "<received input>"
},
password: {
param: "password",
msg: "6 to 20 characters required",
value: "<received input>"
}
}
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我来说两句