add example for package gvalid

.example/util/gvalid/config.toml

@@ -0,0 +1,14 @@
+
+
+
+# MySQL.
+[database]
+    [database.default]
+        link   = "mysql:root:12345678@tcp(127.0.0.1:3306)/test"
+        debug  = true
+
+
+
+
+
+

.example/util/gvalid/gvalid_struct_meta.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"github.com/gogf/gf/errors/gerror"
+	"github.com/gogf/gf/frame/g"
+	"github.com/gogf/gf/util/gmeta"
+)
+
+type UserCreateReq struct {
+	gmeta.Meta `v:"UserCreateReq"`
+	Name       string
+	Pass       string
+}
+
+func UserCreateReqChecker(ctx context.Context, rule string, value interface{}, message string, data interface{}) error {
+	user := &UserCreateReq{}
+	if v, ok := data.(*UserCreateReq); ok {
+		user = v
+	}
+	// SELECT COUNT(*) FROM `user` WHERE `name` = xxx
+	count, err := g.Model("user").Ctx(ctx).Where("name", user.Name).Count()
+	if err != nil {
+		return err
+	}
+	if count > 0 {
+		return gerror.Newf(`The name "%s" is already token`, user.Name)
+	}
+	return nil
+}
+
+func main() {
+	user := &UserCreateReq{
+		Name: "john",
+		Pass: "123456",
+	}
+	err := g.Validator().RuleFunc("UserCreateReq", UserCreateReqChecker).CheckStruct(user)
+	fmt.Println(err)
+}

.example/util/gvalid/i18n/en.toml

@@ -1,15 +1,6 @@
-
-
 "gf.gvalid.required" = "字段不能为空"
 
 
 "ReuiredUserName" = "Please input user name"
 "ReuiredUserType" = "Please select user type"
 
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