itgelo/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.

Description

This is a fork of ozzo-validation to return all validation errors found in every field instead just one error per field and also force validation even with empty data. For instructions on how to use refer to the original README

Installation

Run the following command to install the package:

go get github.com/itgelo/ozzo-validation/v4
go get github.com/itgelo/ozzo-validation/v4/is

Validating a Simple Value

For a simple value, such as a string or an integer, you may use validation.Validate() to validate it. For example,

package main

import (
	"fmt"

	"github.com/itgelo/ozzo-validation/v4"
	"github.com/itgelo/ozzo-validation/v4/is"
)

func main() {
	data := "example"
	err := validation.Validate(data,
		validation.Required,        // not empty
		validation.Length(10, 100), // length between 10 and 100
		is.URL,                     // is a valid URL
	)
	fmt.Println(err)
	// Output:
	// the length must be between 10 and 100,must be a valid URL
}

Normally validation Length, URL etc it does not validate if the data is empty. If you still need to validate it you may use .ForceValidateEmpty() to force validate it. For example,

data := ""
err := validation.Validate(data,
	validation.Required,
	validation.Length(10, 100).ForceValidateEmpty(), // force validate
	is.URL.ForceValidateEmpty(),                     // force validate
)
fmt.Println(err)
// Output:
// cannot be blank,the length must be between 10 and 100,must be a valid URL