Support binding for slice/array obj [Rewrite] (#2302)
Co-authored-by: thinkerou <thinkerou@gmail.com> Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>
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@ -51,7 +51,8 @@ type BindingUri interface {
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// https://github.com/go-playground/validator/tree/v8.18.2.
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type StructValidator interface {
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// ValidateStruct can receive any kind of type and it should never panic, even if the configuration is not right.
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// If the received type is not a struct, any validation should be skipped and nil must be returned.
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// If the received type is a slice|array, the validation should be performed travel on every element.
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// If the received type is not a struct or slice|array, any validation should be skipped and nil must be returned.
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// If the received type is a struct or pointer to a struct, the validation should be performed.
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// If the struct is not valid or the validation itself fails, a descriptive error should be returned.
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// Otherwise nil must be returned.
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@ -35,7 +35,7 @@ type QueryTest struct {
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}
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type FooStruct struct {
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Foo string `msgpack:"foo" json:"foo" form:"foo" xml:"foo" binding:"required"`
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Foo string `msgpack:"foo" json:"foo" form:"foo" xml:"foo" binding:"required,max=32"`
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}
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type FooBarStruct struct {
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@ -181,6 +181,20 @@ func TestBindingJSON(t *testing.T) {
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`{"foo": "bar"}`, `{"bar": "foo"}`)
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}
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func TestBindingJSONSlice(t *testing.T) {
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EnableDecoderDisallowUnknownFields = true
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defer func() {
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EnableDecoderDisallowUnknownFields = false
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}()
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testBodyBindingSlice(t, JSON, "json", "/", "/", `[]`, ``)
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testBodyBindingSlice(t, JSON, "json", "/", "/", `[{"foo": "123"}]`, `[{}]`)
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testBodyBindingSlice(t, JSON, "json", "/", "/", `[{"foo": "123"}]`, `[{"foo": ""}]`)
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testBodyBindingSlice(t, JSON, "json", "/", "/", `[{"foo": "123"}]`, `[{"foo": 123}]`)
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testBodyBindingSlice(t, JSON, "json", "/", "/", `[{"foo": "123"}]`, `[{"bar": 123}]`)
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testBodyBindingSlice(t, JSON, "json", "/", "/", `[{"foo": "123"}]`, `[{"foo": "123456789012345678901234567890123"}]`)
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}
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func TestBindingJSONUseNumber(t *testing.T) {
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testBodyBindingUseNumber(t,
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JSON, "json",
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@ -1181,6 +1195,20 @@ func testBodyBinding(t *testing.T, b Binding, name, path, badPath, body, badBody
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assert.Error(t, err)
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}
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func testBodyBindingSlice(t *testing.T, b Binding, name, path, badPath, body, badBody string) {
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assert.Equal(t, name, b.Name())
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var obj1 []FooStruct
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req := requestWithBody("POST", path, body)
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err := b.Bind(req, &obj1)
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assert.NoError(t, err)
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var obj2 []FooStruct
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req = requestWithBody("POST", badPath, badBody)
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err = JSON.Bind(req, &obj2)
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assert.Error(t, err)
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}
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func testBodyBindingStringMap(t *testing.T, b Binding, path, badPath, body, badBody string) {
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obj := make(map[string]string)
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req := requestWithBody("POST", path, body)
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@ -5,7 +5,9 @@
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package binding
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import (
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"fmt"
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"reflect"
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"strings"
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"sync"
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"github.com/go-playground/validator/v10"
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@ -16,22 +18,54 @@ type defaultValidator struct {
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validate *validator.Validate
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}
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type sliceValidateError []error
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func (err sliceValidateError) Error() string {
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var errMsgs []string
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for i, e := range err {
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if e == nil {
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continue
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}
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errMsgs = append(errMsgs, fmt.Sprintf("[%d]: %s", i, e.Error()))
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}
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return strings.Join(errMsgs, "\n")
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}
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var _ StructValidator = &defaultValidator{}
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// ValidateStruct receives any kind of type, but only performed struct or pointer to struct type.
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func (v *defaultValidator) ValidateStruct(obj interface{}) error {
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value := reflect.ValueOf(obj)
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valueType := value.Kind()
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if valueType == reflect.Ptr {
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valueType = value.Elem().Kind()
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}
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if valueType == reflect.Struct {
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v.lazyinit()
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if err := v.validate.Struct(obj); err != nil {
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return err
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}
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}
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if obj == nil {
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return nil
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}
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value := reflect.ValueOf(obj)
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switch value.Kind() {
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case reflect.Ptr:
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return v.ValidateStruct(value.Elem().Interface())
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case reflect.Struct:
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return v.validateStruct(obj)
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case reflect.Slice, reflect.Array:
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count := value.Len()
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validateRet := make(sliceValidateError, 0)
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for i := 0; i < count; i++ {
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if err := v.ValidateStruct(value.Index(i).Interface()); err != nil {
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validateRet = append(validateRet, err)
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}
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}
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if len(validateRet) == 0 {
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return nil
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}
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return validateRet
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default:
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return nil
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}
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}
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// validateStruct receives struct type
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func (v *defaultValidator) validateStruct(obj interface{}) error {
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v.lazyinit()
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return v.validate.Struct(obj)
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}
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// Engine returns the underlying validator engine which powers the default
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68
binding/default_validator_test.go
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68
binding/default_validator_test.go
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@ -0,0 +1,68 @@
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// Copyright 2020 Gin Core Team. All rights reserved.
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// Use of this source code is governed by a MIT style
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// license that can be found in the LICENSE file.
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package binding
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import (
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"errors"
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"testing"
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)
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func TestSliceValidateError(t *testing.T) {
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tests := []struct {
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name string
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err sliceValidateError
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want string
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}{
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{"has nil elements", sliceValidateError{errors.New("test error"), nil}, "[0]: test error"},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := tt.err.Error(); got != tt.want {
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t.Errorf("sliceValidateError.Error() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestDefaultValidator(t *testing.T) {
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type exampleStruct struct {
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A string `binding:"max=8"`
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B int `binding:"gt=0"`
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}
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tests := []struct {
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name string
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v *defaultValidator
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obj interface{}
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wantErr bool
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}{
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{"validate nil obj", &defaultValidator{}, nil, false},
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{"validate int obj", &defaultValidator{}, 3, false},
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{"validate struct failed-1", &defaultValidator{}, exampleStruct{A: "123456789", B: 1}, true},
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{"validate struct failed-2", &defaultValidator{}, exampleStruct{A: "12345678", B: 0}, true},
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{"validate struct passed", &defaultValidator{}, exampleStruct{A: "12345678", B: 1}, false},
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{"validate *struct failed-1", &defaultValidator{}, &exampleStruct{A: "123456789", B: 1}, true},
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{"validate *struct failed-2", &defaultValidator{}, &exampleStruct{A: "12345678", B: 0}, true},
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{"validate *struct passed", &defaultValidator{}, &exampleStruct{A: "12345678", B: 1}, false},
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{"validate []struct failed-1", &defaultValidator{}, []exampleStruct{{A: "123456789", B: 1}}, true},
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{"validate []struct failed-2", &defaultValidator{}, []exampleStruct{{A: "12345678", B: 0}}, true},
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{"validate []struct passed", &defaultValidator{}, []exampleStruct{{A: "12345678", B: 1}}, false},
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{"validate []*struct failed-1", &defaultValidator{}, []*exampleStruct{{A: "123456789", B: 1}}, true},
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{"validate []*struct failed-2", &defaultValidator{}, []*exampleStruct{{A: "12345678", B: 0}}, true},
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{"validate []*struct passed", &defaultValidator{}, []*exampleStruct{{A: "12345678", B: 1}}, false},
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{"validate *[]struct failed-1", &defaultValidator{}, &[]exampleStruct{{A: "123456789", B: 1}}, true},
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{"validate *[]struct failed-2", &defaultValidator{}, &[]exampleStruct{{A: "12345678", B: 0}}, true},
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{"validate *[]struct passed", &defaultValidator{}, &[]exampleStruct{{A: "12345678", B: 1}}, false},
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{"validate *[]*struct failed-1", &defaultValidator{}, &[]*exampleStruct{{A: "123456789", B: 1}}, true},
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{"validate *[]*struct failed-2", &defaultValidator{}, &[]*exampleStruct{{A: "12345678", B: 0}}, true},
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{"validate *[]*struct passed", &defaultValidator{}, &[]*exampleStruct{{A: "12345678", B: 1}}, false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if err := tt.v.ValidateStruct(tt.obj); (err != nil) != tt.wantErr {
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t.Errorf("defaultValidator.Validate() error = %v, wantErr %v", err, tt.wantErr)
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}
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})
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}
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}
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