checker: add list

checker.go

@@ -2,12 +2,13 @@ package govalid
 
 import (
 	"fmt"
-	"golang.org/x/text/language"
 	"reflect"
 	"regexp"
 	"strconv"
 	"strings"
 	"unicode/utf8"
+
+	"golang.org/x/text/language"
 )
 
 // CheckFunc is the type of checker function.
@@ -45,6 +46,7 @@ var Checkers = map[string]CheckFunc{
 	"phone":        phone,
 	"idcard":       idCard,
 	"equal":        equal,
+	"list":         list,
 }
 
 func required(c CheckerContext) *ErrContext {
@@ -384,3 +386,15 @@ func equal(c CheckerContext) *ErrContext {
 	}
 	return MakeFieldNotFoundError(c)
 }
+
+func list(c CheckerContext) *ErrContext {
+	ctx := NewErrorContext(c)
+	value := fmt.Sprintf("%v", ctx.FieldValue)
+	allowValues := strings.Split(c.Rule.params[0], ",")
+	for _, v := range allowValues {
+		if value == v {
+			return nil
+		}
+	}
+	return ctx
+}

checker_test.go

@@ -668,6 +668,27 @@ func Test_Equal(t *testing.T) {
 	assert.Nil(t, errs)
 }
 
+func Test_List(t *testing.T) {
+	v := struct {
+		Role string `valid:"list:admin,editor,viewer" label:"角色"`
+	}{
+		Role: "superadmin",
+	}
+	errs, ok := Check(v)
+	assert.False(t, ok)
+	assert.Equal(t, 1, len(errs))
+	assert.Equal(t, "角色不是一个有效的值", errs[0].Error())
+
+	v = struct {
+		Role string `valid:"list:admin,editor,viewer" label:"角色"`
+	}{
+		Role: "admin",
+	}
+	errs, ok = Check(v)
+	assert.True(t, ok)
+	assert.Nil(t, errs)
+}
+
 func Test_StructSlice(t *testing.T) {
 	type user struct {
 		Name string `valid:"required" label:"用户名"`

template.go

@@ -18,6 +18,7 @@ var errorTemplateChinese = map[string]string{
 	"phone":          "不是合法的号码",
 	"idcard":         "不是合法的身份证号",
 	"equal":          "的值前后不相同",
+	"list":           "不是一个有效的值",
 
 	"_checkerNotFound":      "检查规则未找到}}",
 	"_unknownErrorTemplate": "{{未知错误}}",
@@ -44,6 +45,7 @@ var errorTemplateEnglish = map[string]string{
 	"phone":          " is not a valid phone number",
 	"idcard":         " is not a valid ID card number",
 	"equal":          " the value before and after is not the same",
+	"list":           " is not a valid value",
 
 	"_checkerNotFound":      " check rule not found}}",
 	"_unknownErrorTemplate": "{{unknown error}}",