validation

package

v1.1.0 Latest Latest Go to latest Published: Nov 6, 2026 License: MIT Imports: 13 Imported by: 0

Details

Package validation validates struct tags without framework dependencies.

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func ApplicationError(err error) *app.AppError

ApplicationError converts field failures into approved public validation details, preserving the original cause.

func DecodeJSON(w http.ResponseWriter, r *http.Request, dst any, maxBytes int64) error

DecodeJSON consumes and closes one bounded JSON request body, rejects unknown fields/trailing documents, then validates dst.

func Struct(v any) error

Struct validates nested struct fields and collects safe field-level errors.

type Errors []FieldError

Errors collects field-level validation failures.

func (e Errors) Error() string

Error returns a diagnostic error description.

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

FieldError describes a safe field-level validation failure.

type Validator struct{ Rules map[string]func(any) bool }

Validator applies built-in rules and optional application validators.

func (v Validator) Struct(x any) error

Struct validates nested struct fields and collects safe field-level errors.