如何在Golang中设计RESTAPI为太多的桌子设计
我认为,如果我继续使用下面的方法,我将必须编写太多代码。
我声明了所有表的结构。我使用GO Validate软件包进行验证。
[types.go]
type TableA struct {
Field1 string `json:"field1" validate:"required, max=10"`
Field2 int `json:"field2" validate:"number"`
}
type TableB struct {
...
}
我为每种方法初始化了路由器,并连接了处理程序。
[tablea.go]
router.Get("/table-a", r.Get_tableA_Handler),
router.Post("/table-a", r.Post_tableA_Handler),
router.Patch("/table-a", r.Patch_tableA_Handler),
router.Delete("/table-a", r.Delete_tableA_Handler)
...
每个处理程序在请求主体中解析JSON,验证数据并调用数据库功能。
[tablea_router.go]
func (rt *tableARouter) Post_tableA_Handler(w http.ResponseWriter, r *http.Request) error {
//Json to Struct
req := new(types.tableA)
if err := httputils.DecodeJsonBody(r, req); err != nil {
return err
}
// Validation
if err := validCheck(req); err != nil {
return err
}
// DB function
err := rt.insert_tableA_DB(r.Context(), req)
if err != nil {
return err
}
return rt.rd.JSON(w, http.StatusCreated, "Create Success")
}
...
func validCheck(data interface{}) error {
validate := validator.New()
err := validate.Struct(data)
return err
}
DB函数,
这是从上面的处理程序函数(使用Gorm) [tablea_db.go]的
func (rt *tableARouter) insert_tableA_DB(ctx context.Context, data *types.TableA) error {
// DB Connect
db, err := db.Open(rt.dbcfg)
if err != nil {
return err
}
defer db.Close()
tx := db.Begin()
defer tx.Rollback()
// == INSERT ==
query := `INSERT INTO table_a
(field1, field2, ...)
VALUES (?, ?, ...)`
result := tx.WithContext(ctx).Exec(query,
data.Field1, data.Field2, ...)
//Result
if result.Error != nil {
...
}
现在有太多的表...如果有100个表,我必须编写100个处理程序和100个DB功能。 有什么方法可以使用/tables/{tableName}
之类的东西? 请给我任何建议....谢谢。
I think if i keep using the method below, i'll have to write too much code.
I declared structures for all the tables. and i used the go validate package for validation.
[types.go]
type TableA struct {
Field1 string `json:"field1" validate:"required, max=10"`
Field2 int `json:"field2" validate:"number"`
}
type TableB struct {
...
}
And i initialized the router for each method and connected the handlers.
[tableA.go]
router.Get("/table-a", r.Get_tableA_Handler),
router.Post("/table-a", r.Post_tableA_Handler),
router.Patch("/table-a", r.Patch_tableA_Handler),
router.Delete("/table-a", r.Delete_tableA_Handler)
...
Each handler parses the json in the request body, validates the data and call the db function.
[tableA_router.go]
func (rt *tableARouter) Post_tableA_Handler(w http.ResponseWriter, r *http.Request) error {
//Json to Struct
req := new(types.tableA)
if err := httputils.DecodeJsonBody(r, req); err != nil {
return err
}
// Validation
if err := validCheck(req); err != nil {
return err
}
// DB function
err := rt.insert_tableA_DB(r.Context(), req)
if err != nil {
return err
}
return rt.rd.JSON(w, http.StatusCreated, "Create Success")
}
...
func validCheck(data interface{}) error {
validate := validator.New()
err := validate.Struct(data)
return err
}
This is a DB function called from the handler function above (using Gorm)
[tableA_db.go]
func (rt *tableARouter) insert_tableA_DB(ctx context.Context, data *types.TableA) error {
// DB Connect
db, err := db.Open(rt.dbcfg)
if err != nil {
return err
}
defer db.Close()
tx := db.Begin()
defer tx.Rollback()
// == INSERT ==
query := `INSERT INTO table_a
(field1, field2, ...)
VALUES (?, ?, ...)`
result := tx.WithContext(ctx).Exec(query,
data.Field1, data.Field2, ...)
//Result
if result.Error != nil {
...
}
There are too many tables now... If there are 100 tables i have to write 100 handlers and 100 DB functions.
Is there any way to use something like /tables/{tableName}
?
Please give me any advice.... Thank you.
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您可以使用ORM软件包,例如GORM来更轻松地工作。
或者,您可以制作一个通用处理程序并使用反射包,分析定义的结构并在innam上进行每个SQL查询。但这不是最好的解决方案,如果您的任何结构都具有内部切片,其他嵌入式结构,或者您需要使用连接的桌子,您也必须手动处理它。我有一个服务器,其中有200多种端点,其中包含200多个SQL表的3-400多种方法,并且整个服务器都是手工编写的。但是我可以说,当处理程序和DB弹性可以重复使用而无需修改时,这是非常罕见的。
也许您可以将错误处理,回滚/提交,JSON解析和响应零件包装在FUNC中,然后使用它来调用数据库方法。
You can use an ORM package, like GORM to make easier your work.
Or you can make an universal handler and with the reflect package, analyze your defined structs and make every SQL query dinamically. But it's not the best solution if any of your struct has inner slices, other embedded structs, or if you need to use joined tables you also have to deal with it manually. I have servers where we have more than 200 endpoints with more than 3-400 methods with 200+ SQL tables and the whole server was written by hand. But I can say, it's very rare when a handler and the DB func can be reused without modifying.
Maybe you can wrap the error handling, rollback/commit, json parse and response parts in a func then use it to call the DB methods.