我很想去学习,我正在设置一个使用gin-gonic服务器的应用程序。 我设法让它与主程序包中的所有东西一起工作,我想更好地组织它与包中的所有最相关的(我管理)并按文件分割每个组CRUD。
所以在init函数中的包的“main”文件中,我定义了:
Router := gin.New()
Router.Use(gin.Logger())
Router.Use(gin.Recovery())
我虽然我能够在包的每个其他文件中使用它:
v1 := Router.Group("/api/v1/todos")
v1.Use(AuthRequired())
{
v1.POST("/", CreateTodo)
v1.GET("/", FetchAllTodo)
v1.GET("/:id", FetchSingleTodo)
v1.PUT("/:id", UpdateTodo)
v1.DELETE("/:id", DeleteTodo)
}
或
packagename.Router.Group
但没有人工作,我得到了:
undefined:Router.Group中的路由器
斯特凡 PS:我确实为包设置了一个子文件夹,如果它在一个文件中,我可以构建它。
我虽然解决方案是将路由器变量声明为* gin.Engine但是在编译正常时,我在Router.Group调用上遇到了恐慌错误
让我发布更多部分代码:
maincode.go:
package main
import (
"fmt"
"./apirest"
"github.com/braintree/manners"
)
func main(){
fmt.Printf("hello world.\n")
//router.Run()
manners.ListenAndServe(":8080", apirest.Router)
}
然后我将apirest包拆分为2个文件:
apirest.go(我做了手动清理,也许我错过了导入):
package apirest
import (
"fmt"
"github.com/gin-gonic/gin"
"github.com/braintree/manners"
"os"
"os/signal"
)
//Router pour gérer l'api
var Router *gin.Engine
/*
MAIN FUNCTION
*/
func init() {
Router := gin.New()
Router.Use(gin.Logger())
Router.Use(gin.Recovery())
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func(){
for sig := range c {
// sig is a ^C, handle it
fmt.Printf("ctl+c catched "+sig.String())
manners.Close()
}
}()
LoadMonitor()
}
然后处理所有声明的todoCRUD.go文件,todoCRUD.go和apirest.go位于相同的子文件夹apirest(并编译好):
package apirest
import (
"fmt"
"github.com/gin-gonic/gin"
"gopkg.in/validator.v2"
"github.com/jinzhu/gorm"
"strconv"
"net/http"
"time"
)
//Todo definition d'un element todo
type Todo struct {
gorm.Model
CreatedAt time.Time
UpdatedAt time.Time
OwnerID int `json:"ownerid" validate:"nonzero"`
URL string `json:"url"`
}
//TransformedTodo version pour le retour d'api sans certaines infos
type TransformedTodo struct {
ID uint `json:"id"`
CreatedAt time.Time
UpdatedAt time.Time
OwnerID uint `json:"ownerid"`
URL string `json:"url"`
}
//LoadTodo permet de lancer le mappage todos
func LoadTodo(){
v1 := Router.Group("/api/v1/todos")
{
v1.POST("/", CreateTodo)
v1.GET("/", FetchAllTodo)
v1.GET("/:id", FetchSingleTodo)
v1.PUT("/:id", UpdateTodo)
v1.DELETE("/:id", DeleteTodo)
}
}
//CreateTodo génération d'un todo
func CreateTodo(c *gin.Context) {
owner, _ := strconv.Atoi(c.PostForm("ownerid"))
todo := Todo{
OwnerID: owner,
URL: c.PostForm("url"),
};
v := validator.NewValidator()
if errs := v.Validate(todo); errs!=nil {
errors := errs.(validator.ErrorMap)
var errOuts []string
for f, e := range errors {
errOuts = append(errOuts, fmt.Sprintf("\t - %s (%v)\n", f, e))
}
//c.JSON(500, gin.H{"Error": errs.Error()})
c.JSON(500, gin.H{"Erreur sur le(s) champ(s) : ": errOuts})
} else {
db, _ := Database()
defer db.Close()
db.Save(&todo)
c.JSON(http.StatusCreated, gin.H{"status" : http.StatusCreated, "message" : "Todo item created successfully!", "resourceId": todo.ID})
}
}
//FetchAllTodo récupération de tous les todos
func FetchAllTodo(c *gin.Context) {
var todos []Todo
var _todos []TransformedTodo
db, _ := Database()
defer db.Close()
db.Find(&todos)
if (len(todos) <= 0) {
c.JSON(http.StatusNotFound, gin.H{"status" : http.StatusNotFound, "message" : "No todo found!"})
return
}
//transforms the todos for building a good response,
//je peux choisir des champs a ne pas display
for _, item := range todos {
status := false
if (item.Status == 1) {
status = true
} else {
status = false
}
_todos = append(_todos, TransformedTodo{ID: item.ID, URL:item.URL})
}
c.JSON(http.StatusOK, gin.H{"status" : http.StatusOK, "data" : _todos})
}
//FetchSingleTodo Récupération d'un seul todo en fonction de son id
func FetchSingleTodo(c *gin.Context) {
var todo Todo
todoID := c.Param("id")
db, _ := Database()
defer db.Close()
db.First(&todo, todoID)
if (todo.ID == 0) {
c.JSON(http.StatusNotFound, gin.H{"status" : http.StatusNotFound, "message" : "No todo found!"})
return
}
_todo := TransformedTodo{ID: todo.ID, URL:todo.URL}
c.JSON(http.StatusOK, gin.H{"status" : http.StatusOK, "data" : _todo})
}
//UpdateTodo Mise à jour d'un todo
func UpdateTodo(c *gin.Context) {
var todo Todo
todoID := c.Param("id")
db, _ := Database()
defer db.Close()
db.First(&todo, todoID)
if (todo.ID == 0) {
c.JSON(http.StatusNotFound, gin.H{"status" : http.StatusNotFound, "message" : "No todo found!"})
return
}
db.Model(&todo).Update("title", c.PostForm("title"))
db.Model(&todo).Update("completed", c.PostForm("completed"))
c.JSON(http.StatusOK, gin.H{"status" : http.StatusOK, "message" : "Todo updated successfully!"})
}
//DeleteTodo Suppression d'un todo
func DeleteTodo(c *gin.Context) {
var todo Todo
todoID := c.Param("id")
db, _ := Database()
defer db.Close()
db.First(&todo, todoID)
if (todo.ID == 0) {
c.JSON(http.StatusNotFound, gin.H{"status" : http.StatusNotFound, "message" : "No todo found!"})
return
}
db.Delete(&todo)
c.JSON(http.StatusOK, gin.H{"status" : http.StatusOK, "message" : "Todo deleted successfully!"})
}
想法是为每个要处理的实体提供一个xxxxCRUD.go文件,但是同一个包中的整个文件夹。
确切的错误是:
PS D:\ www \ developpement&gt; go run。\ maincode.go [GIN-debug] [警告] 以“调试”模式运行。在生产中切换到“释放”模式。 - 使用env:export GIN_MODE = release - 使用代码:gin.SetMode(gin.ReleaseMode)
恐慌:运行时错误:无效的内存地址或无指针 解引用[信号0xc0000005代码= 0x0 addr = 0x0 pc = 0x46cc0f]
goroutine 1 [running]:恐慌(0x831880,0xc04200a080) C:/Go/src/runtime/panic.go:500 + 0x1af / d /www/developpement/apirest.LoadTodo() D:/www/developpement/apirest/todoCRUD.go:33 + 0x2f [Router.Group] / d /www/developpement/apirest.init.1() D:/www/developpement/apirest/apirest.go:73 + 0x220 [LoadTodo()] / d /www/developpement/apirest.init() D:/www/developpement/apirest/todoCRUD.go:190 + 0x80 [last line] main.init() D:/www/developpement/maincode.go:13 + 0x3a [manners.ListenAndServe(“:8080”,apirest.Router)]退出状态2
我希望这有助于理解!
感谢您的时间和帮助!
斯特凡
答案 0 :(得分:1)
我确实通过在LoadTodo函数中“发送”路由器来使其工作:
在apirest.go中:
LoadTodo(Router)
和todoCRUD.go:
func LoadTodo(r *gin.Engine){
并且它工作正常......我希望我没有在代码中带来错误...
斯特凡