Hello all :smiley:. What is the best way to handle...

# ktor

[Rodrigo Silva]

Hello all 😃. What is the best way to handle validation errors in Ktor? In spring I used the @ControllerAdvice and @ExceptionHandler (). But I'm a little lost here

[Dico]

Add an early pipeline handler and respond to the call with your status code/message

[Rodrigo Silva]

But if I have a form with the following field:
name
last name
phone

And each field has its validation, with its message (minimum number of characters, can not be null, etc). Do I add to the pipeline validation, and will I have the return of every error?
Example: The user has filled in all fields in the wrong way:
status code 400
{
{
field: name
message: Can not be null
}
{
field: last name
message: Can not be null
}
{
field: phone
message: Can not be null
}
}

[Dico]

That's up to you

[Dico]

Probably doesn't need to be so detailed

[Rodrigo Silva]

Thx @Dico. I got something close to what I wanted using Yavi.

[coderskitchen]

Maybe worth a look for you https://github.com/tyntec/ktor-problem . It provides a consistent pattern for error responses. In Java with Spring I used a similar library that catches the validation errors and translated them into a RFC7807 compatible object.