gvalid

Documentation

Overview

Package gvalid implements powerful and useful data/form validation functionality.

Index

• func DeleteRule(rule string)
• func RegisterRule(rule string, f RuleFunc) error
• type CustomMsg
• type Error
  • func CheckMap(ctx context.Context, params interface{}, rules interface{}, ...) Error
  • func CheckStruct(ctx context.Context, object interface{}, rules interface{}, ...) Error
  • func CheckStructWithData(ctx context.Context, object interface{}, data interface{}, rules interface{}, ...) Error
  • func CheckValue(ctx context.Context, value interface{}, rules string, messages interface{}, ...) Error
• type RuleFunc
• type Validator
  • func New() *Validator
  • func (v *Validator) CheckMap(params interface{}) Error
  • func (v *Validator) CheckStruct(object interface{}) Error
  • func (v *Validator) CheckValue(value interface{}) Error
  • func (v *Validator) Clone() *Validator
  • func (v *Validator) Ctx(ctx context.Context) *Validator
  • func (v *Validator) Data(data interface{}) *Validator
  • func (v *Validator) I18n(i18nManager *gi18n.Manager) *Validator
  • func (v *Validator) Messages(messages interface{}) *Validator
  • func (v *Validator) RuleFunc(rule string, f RuleFunc) *Validator
  • func (v *Validator) RuleFuncMap(m map[string]RuleFunc) *Validator
  • func (v *Validator) Rules(rules interface{}) *Validator

Examples

• CheckMap
• CheckStruct
• RegisterRule
• Validator.CheckMap
• Validator.CheckStruct
• Validator.CheckValue
• Validator.Rules

Functions

func DeleteRule

func DeleteRule(rule string)

DeleteRule deletes custom defined validation rule and its function from global package.

func RegisterRule

func RegisterRule(rule string, f RuleFunc) error

RegisterRule registers custom validation rule and function for package. It returns error if there's already the same rule registered previously.

Example

package main

import (
	"context"
	"errors"
	"fmt"

	"gitee.com/micro-tools/wf/frame/g"
	"gitee.com/micro-tools/wf/util/gconv"
	"gitee.com/micro-tools/wf/util/gvalid"
)

func main() {
	type User struct {
		Id   int
		Name string `v:"required|unique-name # 请输入用户名称|用户名称已被占用"`
		Pass string `v:"required|length:6,18"`
	}
	user := &User{
		Id:   1,
		Name: "john",
		Pass: "123456",
	}

	rule := "unique-name"
	gvalid.RegisterRule(rule, func(ctx context.Context, rule string, value interface{}, message string, data interface{}) error {
		var (
			id   = data.(*User).Id
			name = gconv.String(value)
		)
		n, err := g.Model("user").Where("id != ? and name = ?", id, name).Count()
		if err != nil {
			return err
		}
		if n > 0 {
			return errors.New(message)
		}
		return nil
	})
	err := gvalid.CheckStruct(context.TODO(), user, nil)
	fmt.Println(err.Error())
	// May Output:
	// 用户名称已被占用
}

Types

type CustomMsg

type CustomMsg = map[string]interface{}

CustomMsg is the custom error message type, like: map[field] => string|map[rule]string

type Error

type Error interface {
	Current() error
	Error() string
	FirstItem() (key string, messages map[string]string)
	FirstRule() (rule string, err string)
	FirstString() (err string)
	Items() (items []map[string]map[string]string)
	Map() map[string]string
	Maps() map[string]map[string]string
	String() string
	Strings() (errs []string)
}

Error is the validation error for validation result.

func CheckMap

func CheckMap(ctx context.Context, params interface{}, rules interface{}, messages ...CustomMsg) Error

CheckMap validates map and returns the error result. It returns nil if with successful validation.

The parameter `rules` can be type of []string/map[string]string. It supports sequence in error result if `rules` is type of []string. The optional parameter `messages` specifies the custom error messages for specified keys and rules.

Example

package main

import (
	"context"

	"fmt"

	"gitee.com/micro-tools/wf/util/gvalid"
)

func main() {
	params := map[string]interface{}{
		"passport":  "",
		"password":  "123456",
		"password2": "1234567",
	}
	rules := []string{
		"passport@required|length:6,16#账号不能为空|账号长度应当在:min到:max之间",
		"password@required|length:6,16|same:password2#密码不能为空|密码长度应当在:min到:max之间|两次密码输入不相等",
		"password2@required|length:6,16#",
	}
	if e := gvalid.CheckMap(context.TODO(), params, rules); e != nil {
		fmt.Println(e.Map())
		fmt.Println(e.FirstItem())
		fmt.Println(e.FirstString())
	}
	// May Output:
	// map[required:账号不能为空 length:账号长度应当在6到16之间]
	// passport map[required:账号不能为空 length:账号长度应当在6到16之间]
	// 账号不能为空
}

func CheckStruct

func CheckStruct(ctx context.Context, object interface{}, rules interface{}, messages ...CustomMsg) Error

CheckStruct validates struct and returns the error result.

The parameter `object` should be type of struct/*struct. The parameter `rules` can be type of []string/map[string]string. It supports sequence in error result if `rules` is type of []string. The optional parameter `messages` specifies the custom error messages for specified keys and rules.

Example

Empty string attribute.

package main

import (
	"context"

	"fmt"

	"gitee.com/micro-tools/wf/util/gvalid"
)

func main() {
	type Params struct {
		Page      int    `v:"required|min:1         # page is required"`
		Size      int    `v:"required|between:1,100 # size is required"`
		ProjectId string `v:"between:1,10000        # project id must between :min, :max"`
	}
	obj := &Params{
		Page: 1,
		Size: 10,
	}
	err := gvalid.CheckStruct(context.TODO(), obj, nil)
	fmt.Println(err == nil)
}

Output:

true

func CheckStructWithData

func CheckStructWithData(ctx context.Context, object interface{}, data interface{}, rules interface{}, messages ...CustomMsg) Error

CheckStructWithData validates struct with given parameter map and returns the error result.

The parameter `object` should be type of struct/*struct. The parameter `rules` can be type of []string/map[string]string. It supports sequence in error result if `rules` is type of []string. The optional parameter `messages` specifies the custom error messages for specified keys and rules.

func CheckValue

func CheckValue(ctx context.Context, value interface{}, rules string, messages interface{}, params ...interface{}) Error

CheckValue checks single value with specified rules. It returns nil if successful validation.

The parameter `value` can be any type of variable, which will be converted to string for validation. The parameter `rules` can be one or more rules, multiple rules joined using char '|'. The parameter `messages` specifies the custom error messages, which can be type of: string/map/struct/*struct. The optional parameter `params` specifies the extra validation parameters for some rules like: required-*、same、different, etc.

type RuleFunc

type RuleFunc func(ctx context.Context, rule string, value interface{}, message string, data interface{}) error

RuleFunc is the custom function for data validation. The parameter `rule` specifies the validation rule string, like "required", "between:1,100", etc. The parameter `value` specifies the value for this rule to validate. The parameter `message` specifies the custom error message or configured i18n message for this rule. The parameter `data` specifies the `data` which is passed to the Validator. It might be type of map/struct or a nil value. You can ignore the parameter `data` if you do not really need it in your custom validation rule.

type Validator

type Validator struct {
	// contains filtered or unexported fields
}

Validator is the validation manager for chaining operations.

func New

func New() *Validator

New creates and returns a new Validator.

func (*Validator) CheckMap

func (v *Validator) CheckMap(params interface{}) Error

CheckMap validates map and returns the error result. It returns nil if with successful validation. The parameter `params` should be type of map.

Example

package main

import (
	"gitee.com/micro-tools/wf/frame/g"
)

func main() {
	params := map[string]interface{}{
		"passport":  "",
		"password":  "123456",
		"password2": "1234567",
	}
	rules := map[string]string{
		"passport":  "required|length:6,16",
		"password":  "required|length:6,16|same:password2",
		"password2": "required|length:6,16",
	}
	messages := map[string]interface{}{
		"passport": "账号不能为空|账号长度应当在:min到:max之间",
		"password": map[string]string{
			"required": "密码不能为空",
			"same":     "两次密码输入不相等",
		},
	}
	err := g.Validator().Messages(messages).Rules(rules).CheckMap(params)
	if err != nil {
		g.Dump(err.Maps())
	}

	// May Output:
	//{
	//	"passport": {
	//	"length": "账号长度应当在6到16之间",
	//		"required": "账号不能为空"
	//},
	//	"password": {
	//	"same": "两次密码输入不相等"
	//}
	//}
}

func (*Validator) CheckStruct

func (v *Validator) CheckStruct(object interface{}) Error

CheckStruct validates struct and returns the error result. The parameter `object` should be type of struct/*struct.

Example

package main

import (
	"fmt"

	"gitee.com/micro-tools/wf/frame/g"
	"gitee.com/micro-tools/wf/util/gconv"
)

func main() {
	type User struct {
		Name string `v:"required#请输入用户姓名"`
		Type int    `v:"required#请选择用户类型"`
	}
	data := g.Map{
		"name": "john",
	}
	user := User{}
	if err := gconv.Scan(data, &user); err != nil {
		panic(err)
	}
	err := g.Validator().Data(data).CheckStruct(user)
	if err != nil {
		fmt.Println(err.Items())
	}

}

Output:

[map[Type:map[required:请选择用户类型]]]

func (*Validator) CheckValue

func (v *Validator) CheckValue(value interface{}) Error

CheckValue checks single value with specified rules. It returns nil if successful validation.

Example

package main

import (
	"fmt"

	"gitee.com/micro-tools/wf/frame/g"
)

func main() {
	err := g.Validator().Rules("min:18").Messages("未成年人不允许注册哟").CheckValue(16)
	fmt.Println(err.String())

}

Output:

未成年人不允许注册哟

func (*Validator) Clone

func (v *Validator) Clone() *Validator

Clone creates and returns a new Validator which is a shallow copy of current one.

func (*Validator) Ctx

func (v *Validator) Ctx(ctx context.Context) *Validator

Ctx is a chaining operation function, which sets the context for next validation.

func (*Validator) Data

func (v *Validator) Data(data interface{}) *Validator

Data is a chaining operation function, which sets validation data for current operation. The parameter `data` usually be type of map, which specifies the parameter map used in validation. Calling this function also sets `useDataInsteadOfObjectAttributes` true no mather the `data` is nil or not.

func (*Validator) I18n

func (v *Validator) I18n(i18nManager *gi18n.Manager) *Validator

I18n sets the i18n manager for the validator.

func (*Validator) Messages

func (v *Validator) Messages(messages interface{}) *Validator

Messages is a chaining operation function, which sets custom error messages for current operation. The parameter `messages` can be type of string/[]string/map[string]string. It supports sequence in error result if `rules` is type of []string.

func (*Validator) RuleFunc

func (v *Validator) RuleFunc(rule string, f RuleFunc) *Validator

RuleFunc registers one custom rule function to current Validator.

func (*Validator) RuleFuncMap

func (v *Validator) RuleFuncMap(m map[string]RuleFunc) *Validator

RuleFuncMap registers multiple custom rule functions to current Validator.

func (*Validator) Rules

func (v *Validator) Rules(rules interface{}) *Validator

Rules is a chaining operation function, which sets custom validation rules for current operation.

Example

package main

import (
	"fmt"

	"gitee.com/micro-tools/wf/frame/g"
)

func main() {
	data := g.Map{
		"password": "123",
	}
	err := g.Validator().Data(data).Rules("required-with:password").Messages("请输入确认密码").CheckValue("")
	fmt.Println(err.String())

}

Output:

请输入确认密码