add custom regex validator

baked_in.go

@@ -11,6 +11,7 @@ import (
 	"net/url"
 	"os"
 	"reflect"
+	"regexp"
 	"strconv"
 	"strings"
 	"sync"
@@ -133,6 +134,7 @@ var (
 		"endswith":                endsWith,
 		"startsnotwith":           startsNotWith,
 		"endsnotwith":             endsNotWith,
+		"regex":                   regex,
 		"isbn":                    isISBN,
 		"isbn10":                  isISBN10,
 		"isbn13":                  isISBN13,
@@ -767,6 +769,11 @@ func fieldExcludes(fl FieldLevel) bool {
 	return !strings.Contains(field.String(), currentField.String())
 }
 
+func regex(fl FieldLevel) bool {
+	regex := regexp.MustCompile(fl.Param())
+	return regex.MatchString(fl.Field().String())
+}
+
 // IsNeField is the validation function for validating if the current field's value is not equal to the field specified by the param's value.
 func isNeField(fl FieldLevel) bool {
 

translations/en/en.go

@@ -1143,6 +1143,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} is not in the correct format",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} must be a valid ISBN number",
@@ -1325,8 +1330,8 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 			tag:         "json",
 			translation: "{0} must be a valid json string",
 			override:    false,
-    },
-    {
+		},
+		{
 			tag:         "lowercase",
 			translation: "{0} must be a lowercase string",
 			override:    false,

translations/es/es.go

@@ -1143,6 +1143,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} no tiene el formato correcto",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} debe ser un número ISBN válido",

translations/fr/fr.go

@@ -1138,6 +1138,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} n'est pas au bon format",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} doit être un numéro ISBN valid",

translations/id/id.go

@@ -1138,6 +1138,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "Format {0} salah",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} harus berupa nomor ISBN yang valid",

translations/ja/ja.go

@@ -1194,6 +1194,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0}は正しい形式ではありません",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0}は正しいISBN番号でなければなりません",

translations/nl/nl.go

@@ -1138,6 +1138,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} is not in the correct format",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} moet een geldig ISBN nummer zijn",

translations/pt/pt.go

@@ -1143,6 +1143,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} não está no formato correto",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} deve ser um número de ISBN válido",

translations/pt_BR/pt_BR.go

@@ -1138,6 +1138,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} não está no formato correto",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} deve ser um número ISBN válido",

translations/ru/ru.go

@@ -1143,6 +1143,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} имеет неправильный формат",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} должен быть ISBN номером",

translations/tr/tr.go

@@ -1138,6 +1138,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0} doğru biçimde değil",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0} geçerli bir ISBN numarası olmalıdır",

translations/zh/zh.go

@@ -1135,6 +1135,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0}的格式不正確",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0}必须是一个有效的ISBN编号",

translations/zh_tw/zh_tw.go

@@ -1131,6 +1131,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				return t
 			},
 		},
+		{
+			tag:         "regex",
+			translation: "{0}的格式不正確",
+			override:    false,
+		},
 		{
 			tag:         "isbn",
 			translation: "{0}必須是一個有效的ISBN編號",