ozzo-validation

An idiomatic Go (golang) validation package. Supports configurable and extensible validation rules (validators) using normal language constructs instead of error-prone struct tags. Pozzo-validation is a Go package that provides configurable and extensible data validation capabilities. It has the following features. Use normal programming constructs rather than error-prone struct tags to specify how data should be validated. Can validate data of different types, e.g., structs, strings, byte slices, slices, maps, and arrays. Can validate custom data types as long as they implement the Validatable interface. Can validate data types that implement the sql.Valuer interface (e.g. sql.NullString). Customizable and well-formatted validation errors. Error code and message translation support. Provide a rich set of validation rules right out of the box. Extremely easy to create and use custom validation rules.