Added RegisterCustomTypeFunc method and usage example.

pull/139/head
Kevin Harrington 9 years ago
parent 048d7b8100
commit 7c844893e1
  1. 47
      examples/custom.go
  2. 11
      validator.go

@ -0,0 +1,47 @@
package main
import (
"database/sql"
"database/sql/driver"
"fmt"
"reflect"
validator "gopkg.in/bluesuncorp/validator.v6"
)
type DbBackedUser struct {
Name sql.NullString `validate:"required"`
Age sql.NullInt64 `validate:"required"`
}
func main() {
config := validator.Config{
TagName: "validate",
ValidationFuncs: validator.BakedInValidators,
}
validate := validator.New(config)
// register all sql.Null* types to use the ValidateValuer CustomTypeFunc
validate.RegisterCustomTypeFunc(ValidateValuer, sql.NullString{}, sql.NullInt64{}, sql.NullBool{}, sql.NullFloat64{})
x := DbBackedUser{Name: sql.NullString{String: "", Valid: true}, Age: sql.NullInt64{Int64: 0, Valid: false}}
errs := validate.Struct(x)
if len(errs) > 0 {
fmt.Printf("Errs:\n%+v\n", errs)
}
}
// ValidateValuer implements validator.CustomTypeFunc
func ValidateValuer(field reflect.Value) interface{} {
if valuer, ok := field.Interface().(driver.Valuer); ok {
val, err := valuer.Value()
if err == nil {
return val
}
// handle the error how you want
}
return nil
}

@ -157,6 +157,17 @@ func (v *Validate) RegisterValidation(key string, f Func) error {
return nil return nil
} }
// RegisterCustomTypeFunc registers types w/a custom type handler function.
func (v *Validate) RegisterCustomTypeFunc(f CustomTypeFunc, sampleTypeValues ...interface{}) {
if v.config.CustomTypeFuncs == nil {
v.config.CustomTypeFuncs = map[reflect.Type]CustomTypeFunc{}
}
for _, sample := range sampleTypeValues {
v.config.CustomTypeFuncs[reflect.TypeOf(sample)] = f
}
v.config.hasCustomFuncs = true
}
// Field validates a single field using tag style validation and returns ValidationErrors // Field validates a single field using tag style validation and returns ValidationErrors
// NOTE: it returns ValidationErrors instead of a single FieldError because this can also // NOTE: it returns ValidationErrors instead of a single FieldError because this can also
// validate Array, Slice and maps fields which may contain more than one error // validate Array, Slice and maps fields which may contain more than one error

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