Validator: Error when put 0 for required int field

[phamduong]

Package version: v9

Issue, Question or Enhancement:

I try to put 0 as value for a required in field and the it says missing required field

Code sample, to showcase or reproduce:

package main

import (
    "fmt"
    "gopkg.in/go-playground/validator.v9"
)

type StockPutForm struct {
    Quantity int `validate:"required"`
}

func main() {
    mystruct := StockPutForm{Quantity:0}
    validate := validator.New()
    err := validate.Struct(mystruct)
    fmt.Println(err)
}

Key: 'StockPutForm.Quantity' Error:Field validation for 'Quantity' failed on the 'required' tag

0 is valid value for int then it should work.

Could you please help.
Thanks.

[phamduong]

My bad, it's documented.
But as in #142 you removed exists validation
Is there any validation that check if value for field exists regardless of what it is?

[deankarn]

It's also documented in the godocs under the required definition

Yes exists was removed because it was confusing, and functionality merged into required.

Just make your int a pointer and keep using required tag.

[deankarn]

Just checking in, did you get this all working?

[phamduong]

it works.
Thanks

[shyandsy]

@deankarn
what does it mean by "Just make your int a pointer and keep using required tag."?

[Hermsi1337]

@deankarn
what does it mean by "Just make your int a pointer and keep using required tag."?

It means that you should use a pointer to an integer instead of an integer itself.

From:

type Testing struct {
    Delay int `validate:"required"`
}

To:

type Testing struct {
    Delay *int `validate:"required"`
}

That way validate:"required" ensures that the pointer is not nil instead of ensuring the value of the integer is not 0.