I am planning to implement Auto Validation

[Linde7777]

Related issue(but stale): #3167

I am planning to implement such feature.

Is your feature request related to a problem? Please describe.
Current auto validation rules is not enough.

Describe the solution you'd like
Imitating Gin's validator implementation.
There is a tag "binding", once you add that tag to the struct, when you call Bind()-like function(in go-zero, it is httpx.Parse()), it will automatically validate the struct's fields.
Gin underlying using the go-playground's validator, it has many validation rules, and also support custom validation rule.

Describe alternatives you've considered
Currently I have no alternatives for auto validation

Additional context
In Gin's implementation, the validation's interface has such function: Validate(obj any) error, and in go-zero, the validation interface's function is Validate() error, I not sure which I should use

[chenquan]

reference:

func init() {
	uni := ut.New(zh.New())
	trans, _ := uni.GetTranslator("zh")

	v := validator.New()
	logx.Must(zh_translations.RegisterDefaultTranslations(v, trans))

	httpx.SetValidator(&validate{validate: v})
}

type validate struct {
	validate *validator.Validate
}

func (v *validate) Validate(r *http.Request, data any) error {
	return v.validate.StructCtx(r.Context(), data)
}

[Linde7777]

Is the code you provided a suggestion for implementation?

I noticed that there are two interface:

// [email protected]/rest/httpx/requests.go 

// Validator defines the interface for validating the request.
type Validator interface {
	// Validate validates the request and parsed data.
	Validate(r *http.Request, data any) error
}

// [email protected]/core/validation/validator.go

// Validator represents a validator.
type Validator interface {
	// Validate validates the value.
	Validate() error
}

I’m curious about why there are two different interfaces. Could you please explain?

[chenquan]

Yes, just choose one of the two.

go-zero/rest/httpx/requests.go

Lines 55 to 59 in 01bbc78

	if valid, ok := v.(validation.Validator); ok {
	return valid.Validate()
	} else if val := validator.Load(); val != nil {
	return val.(Validator).Validate(r, v)
	}