ozzo validation in rule returns error for equal values

September 26, 2023

I have a simple code using echo as engine and ozzo-validation as request validator.

func (a MyRequest) Validate() error {
    return validation.ValidateStruct(
        &a,
        validation.Field(&a.Value,
            validation.Required,
            validation.Length(1, 5),
            validation.Each(validation.NilOrNotEmpty, validation.In([]string{"true", "false"}),
            ),
        ),
    )
}

This is the request I send:

{"value":["true"]}

I get this error from In rule:

value: (0: must be a valid value.).

But when I check the values with == and reflect.DeppEqual, values are equal:

fmt.Println(reflect.DeepEqual([]string{"true", "false"}[0], a.Value[0]))
fmt.Println([]string{"true", "false"}[0] == a.Value[0])


output:
true
true

What am I doing wrong here?

>Solution :

Using validation.Each(validation.In([]string{"true", "false"})) will compare each element in the Value slice against the slice provided to validate.In, i.e. []string{"true", "false"}.

Use validation.In("true", "false") to compare each element in the Value slice against the individual values in validate.In.