Comments (1)
Hi @aloha1003 , in the readme there is a example how to use custom validators.
Custom validators
It is possible to define custom validators by using SetValidationFunc. First, one needs to create a validation function.
// Very simple validator
func notZZ(v interface{}, param string) error {
st := reflect.ValueOf(v)
if st.Kind() != reflect.String {
return errors.New("notZZ only validates strings")
}
if st.String() == "ZZ" {
return errors.New("value cannot be ZZ")
}
return nil
}
Then one needs to add it to the list of validators and give it a "tag" name.
validator.SetValidationFunc("notzz", notZZ)
Then it is possible to use the notzz validation tag. This will print "Field A error: value cannot be ZZ"
type T struct {
A string `validate:"nonzero,notzz"`
}
t := T{"ZZ"}
if errs := validator.Validate(t); errs != nil {
fmt.Printf("Field A error: %s\n", errs["A"][0])
}
from validator.
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from validator.