I use fastest-validator to validate an object like this:
{
"_id":"619e00c177f6ea2eccffd09f",
"parent_id": "619e00c177f6ea2eccffd09f",
}
_id and parent_id must not be equal. How to check that?
I know fastest-validator has following validation for equality. but I need to check the opposite.
(example for type= "equal"):
const schema = {
password: { type: "string", min: 6 },
confirmPassword: { type: "equal", field: "password" }
}
const check = v.compile(schema);
check({ password: "123456", confirmPassword: "123456" }); // Valid
check({ password: "123456", confirmPassword: "pass1234" }); // Fail
Thanks in advance
According to Meta information for custom validators:
You can pass any extra meta information for the custom validators which is available via context.meta.
so I can compare any two field that I want. In my to compare _id and parent_id I can use this:
const v = new Validator({
useNewCustomCheckerFunction: true,
messages: {
notEqual: "_id and parent_id can not be equal"
}
});
const editSchema = {
_id: { type: "string" },
parent_id: {
type: "string",
custom: (value, errors, schema, name, parent, context) =>{
if (context.data._id === value) errors.push({type: "notEqual"})
return value
}
}
};