go validator 值为 0 required 验证

错误示范

package main

import (
	"fmt"
	"github.com/go-playground/validator/v10"
)

type Person struct {
	Name  string `validate:"required"`
	State int    `validate:"required,oneof=0 1"`
}

func main() {
	validate := validator.New()

	p := Person{
		Name:  "abcc",
		State: 0,
	}
	err := validate.Struct(p)

    // Key: 'Person.State' Error:Field validation for 'State' failed on the 'required' tag
	fmt.Println(err)
}

在这个例子中，虽然我们的 State 字段传入了值，但是验证却不通过。

正确示范

在使用 go-playground/validator/v10 验证一些空值的时候，需要使用指针类型。

package main

import (
	"fmt"
	"github.com/go-playground/validator/v10"
)

type Person struct {
	Name  string `validate:"required"`
    // 使用指针类型
	State *int   `validate:"required,oneof=0 1"`
}

func main() {
	validate := validator.New()

	state := 0

	p := Person{
		Name:  "abcc",
		State: &state, // 传入指针
	}
	err := validate.Struct(p)

    // 
	fmt.Println(err)
}