Beego/validation/README.md

validation

validation is a form validation for a data validation and error collecting using Go.

Installation and tests

Install:

go get github.com/astaxie/beego/validation

Test:

go test github.com/astaxie/beego/validation

Example

Direct Use:

import (
	"github.com/astaxie/beego/validation"
	"log"
)

type User struct {
	Name string
	Age int
}

func main() {
	u := User{"man", 40}
	valid := validation.Validation{}
	valid.Required(u.Name, "name")
	valid.MaxSize(u.Name, 15, "nameMax")
	valid.Range(u.Age, 0, 140, "age")
	if valid.HasErrors() {
		// validation does not pass
		// print invalid message
		for _, err := range valid.Errors {
			log.Println(err.Key, err.Message)
		}
	}
	// or use like this
	if v := valid.Max(u.Age, 140, "ageMax"); !v.Ok {
		log.Println(v.Error.Key, v.Error.Message)
	}
}

Struct Tag Use:

import (
	"github.com/astaxie/beego/validation"
)

// validation function follow with "valid" tag
// functions divide with ";"
// parameters in parentheses "()" and divide with ","
// Match function's pattern string must in "//"
type user struct {
	Id   int
	Name string `valid:"Required;Match(/^(test)?\\w*@;com$/)"`
	Age  int    `valid:"Required;Range(1, 140)"`
}

func main() {
	valid := validation.Validation{}
	// ignore empty field valid
	// see CanSkipFuncs
	// valid := validation.Validation{RequiredFirst:true}
	u := user{Name: "test", Age: 40}
	b, err := valid.Valid(u)
	if err != nil {
		// handle error
	}
	if !b {
		// validation does not pass
		// blabla...
	}
}

Use custom function:

import (
	"github.com/astaxie/beego/validation"
)

type user struct {
	Id   int
	Name string `valid:"Required;IsMe"`
	Age  int    `valid:"Required;Range(1, 140)"`
}

func IsMe(v *validation.Validation, obj interface{}, key string) {
	name, ok:= obj.(string)
	if !ok {
		// wrong use case?
		return
	}

	if name != "me" {
		// valid false
		v.SetError("Name", "is not me!")
	}
}

func main() {
	valid := validation.Validation{}
	if err := validation.AddCustomFunc("IsMe", IsMe); err != nil {
		// hadle error
	}
	u := user{Name: "test", Age: 40}
	b, err := valid.Valid(u)
	if err != nil {
		// handle error
	}
	if !b {
		// validation does not pass
		// blabla...
	}
}

Struct Tag Functions:

Required
Min(min int)
Max(max int)
Range(min, max int)
MinSize(min int)
MaxSize(max int)
Length(length int)
Alpha
Numeric
AlphaNumeric
Match(pattern string)
AlphaDash
Email
IP
Base64
Mobile
Tel
Phone
ZipCode

LICENSE

BSD License http://creativecommons.org/licenses/BSD/