validate

package

v0.1.0 Latest Latest Go to latest Published: Jan 17, 2026 License: MIT Imports: 8 Imported by: 0

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func Email(field, value string) error

Email validates an email address.

func MaxLen(field, value string, max int) error

MaxLen ensures a maximum string length.

func MinLen(field, value string, min int) error

MinLen ensures a minimum string length.

func Register(name string, fn ValidatorFunc)

Register adds a custom validator by name.

func Required(field, value string) error

Required ensures a non-empty string.

func SetHooks(next Hooks)

SetHooks replaces validation hooks.

func Struct(value any) error

Struct validates struct fields using `validate` tags.

type Errors struct {
	Fields []FieldError
}

Errors holds multiple field errors.

func As(err error) (*Errors, bool)

As extracts validation errors if present.

func (e *Errors) Error() string

Error implements the error interface.

type FieldError struct {
	Field   string `json:"field"`
	Message string `json:"message"`
}

FieldError describes a validation failure for a field.

type Hooks struct {
	OnError func(value any, err error)
}

Hooks configures validation callbacks.

type ValidatorFunc func(field string, value reflect.Value, param string) *FieldError

ValidatorFunc validates a field with an optional parameter.