在Golang和MongoDB将路线拆分为单独的包

我是Golang的新手，我在Golang和MongoDB中创建了一个api。 经过艰苦的斗争，成功地将控制器和模型包分开，现在我想在一个单独的路由器包中定义路由，并在主包中访问它们，就像控制器和模型一样。我使用gorilla/mux包进行路由。任何人都可以帮我，提前谢谢
这是我所有的代码：

RESTMONGOMVC/main.go

package main

import (
    "RESTMONGOMVC/controllers"
    "log"
    "net/http"

    "github.com/gorilla/mux"

    "gopkg.in/mgo.v2"
)

var (
    session    *mgo.Session
    collection *mgo.Collection
    err        error
)

func getSession() *mgo.Session {
    // Connect to our local mongo
    s, err := mgo.Dial("mongodb://localhost")

    // Check if connection error, is mongo running?
    if err != nil {
        panic(err)
    }

    // Deliver session
    return s
}
func main() {
    var err error
    r := mux.NewRouter()
    uc := controllers.NewNoteController(getSession())
    r.HandleFunc("/api/notes", uc.GetNotes).Methods("GET")
    r.HandleFunc("/api/notes", uc.CreateNote).Methods("POST")
    r.HandleFunc("/api/notes/{id}", uc.UpdateNote).Methods("PUT")
    r.HandleFunc("/api/notes/{id}", uc.DeleteNote).Methods("DELETE")
    http.Handle("/api/", r)
    http.Handle("/", http.FileServer(http.Dir(".")))
    log.Println("Starting Mongodb Session")
    session, err = mgo.Dial("localhost")
    if err != nil {
        panic(err)
    }
    defer session.Close()
    session.SetMode(mgo.Monotonic, true)
    collection = session.DB("notesdb").C("notes")
    log.Println("Listening on 8080")
    http.ListenAndServe(":8080", nil)
}

控制器/note.go

package controllers

import (
    "RESTMONGOMVC/models"
    "encoding/json"
    "log"
    "net/http"
    "time"

    "github.com/gorilla/mux"

    "gopkg.in/mgo.v2"
    "gopkg.in/mgo.v2/bson"
)

var (
    session    *mgo.Session
    collection *mgo.Collection
    err        error
)

type (
    // UserController represents the controller for operating on the User resource
    NoteController struct {
        session *mgo.Session
    }
)

// NewUserController provides a reference to a UserController with provided mongo session
func NewNoteController(s *mgo.Session) *NoteController {
    return &NoteController{s}
}
func (uc NoteController) GetNotes(w http.ResponseWriter, r *http.Request) {
    var notes []models.Note
    iter := collection.Find(nil).Iter()
    result := models.Note{}
    for iter.Next(&result) {
        notes = append(notes, result)
    }
    w.Header().Set("Content-Type", "application/json")
    j, err := json.Marshal(models.NotesResource{Notes: notes})
    if err != nil {
        panic(err)
    }
    w.Write(j)
}

func (uc NoteController) CreateNote(w http.ResponseWriter, r *http.Request) {
    var noteResource models.NoteResource

    err := json.NewDecoder(r.Body).Decode(&noteResource)
    if err != nil {
        panic(err)
    }
    note := noteResource.Note
    //get a new Id
    obj_id := bson.NewObjectId()
    note.Id = obj_id
    note.CreatedOn = time.Now()
    //Insert into document collection
    err = collection.Insert(&note)
    if err != nil {
        panic(err)
    } else {
        log.Printf("Inserted New Record with Title :%s", note.Title)
    }
    j, err := json.Marshal(models.NoteResource{Note: note})
    if err != nil {
        panic(err)
    }
    w.Header().Set("Content-Type", "application/json")
    w.Write(j)
}

func (uc NoteController) UpdateNote(w http.ResponseWriter, r *http.Request) {
    var err error
    //get id from incoming url
    vars := mux.Vars(r)
    id := bson.ObjectIdHex(vars["id"])
    //decode the incoming Note into json
    var noteResource models.NoteResource
    err = json.NewDecoder(r.Body).Decode(&noteResource)
    if err != nil {
        panic(err)
    }
    //partial update on mongodb
    err = collection.Update(bson.M{"_id": id},
        bson.M{"$set": bson.M{
            "title":      noteResource.Note.Title,
            "decription": noteResource.Note.Description,
        }})
    if err == nil {
        log.Printf("Updated Note : %s", id, noteResource.Note.Title)
    } else {
        panic(err)
    }
    w.WriteHeader(http.StatusNoContent)
}
func (uc NoteController) DeleteNote(w http.ResponseWriter, r *http.Request) {
    var err error
    vars := mux.Vars(r)
    id := vars["id"]
    //Remove from database
    err = collection.Remove(bson.M{"_id": bson.ObjectIdHex(id)})
    if err != nil {
        log.Printf("Could not find the Note %s to delete", id)
    }
    w.WriteHeader(http.StatusNoContent)
}

型号/note.go

package models 
 import ( 
    "time" 
    "gopkg.in/mgo.v2/bson" 
  ) 
 type Note struct { 
    Id          bson.ObjectId `bson:"_id" json:"id"` 
    Title       string        `json:"title"` 
    Description string        `json:"description"` 
    CreatedOn   time.Time     `json:"craetedOn"` 
 } 
 type NoteResource struct { 
    Note Note `json:"note"` 
 } 
 type NotesResource struct { 
    Notes []Note `json:"notes"` 
 } 

---

不是编程专家，但这就是我管理路由/处理程序的方式

routes/routes.go

package routes

import (
    "github.com/gorilla/mux"
)

//NewRouter is main routing entry point
func NewRouter() *mux.Router {
    r := mux.NewRouter()

    indexHandler(r)  // Index handler
    fileServer(r) // Fileserver to serve static files
    otherLogicalHandler(r) // Other domain/business logic scoped handler

    return r
}

路线/索引handler.go

package routes

import (
    "fmt"
    "net/http"

    "github.com/gorilla/mux"
    "github.com/myusername/project/models"
)

func indexHandler(r *mux.Router) {
    r.HandleFunc("/", indexMainHandler).Methods("GET")
    // Other endpoints goes there if you want to list it in this current indexHandler.go file
    // Example: r.HandleFunc("/signup", signupMainHandler).Methods("GET")
}

// Handlers

func indexMainHandler(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "text/html; charset=UTF-8")

    // Call your model/s there
    mydata, err := models.GetMyDataFunction()
    if err != nil {
        // Handle your error there
        return
    }

    utils.ExecuteTemplate(w, "index.html", struct {
        Title                 string
        // Use your model data for templates there
        MyData             []models.MyData
        // Other models/data can go there if multiple data objects used per page.
    }{
        Title: "Main Page",
        MyData:             mydata,
    })
}

// func signupMainHandler(w http.ResponseWriter, r *http.Request) ...
// Basically repeat the same logic as in indexMainHandler function

路由/fileServer.go

package routes

import (
    "net/http"

    "github.com/gorilla/mux"
)

func fileServer(r *mux.Router) {
    fs := http.FileServer(http.Dir("static"))
    r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", fs))
}

routes/otherLogicalHandler.go

package routes

import (
    "fmt"
    "net/http"

    "github.com/gorilla/mux"
    "github.com/myusername/project/models"
)

func indexHandler(r *mux.Router) {
    r.HandleFunc("/", indexMainHandler).Methods("GET")
    // Other endpoints goes there if you want to list it in this current indexHandler.go file
    // Example: r.HandleFunc("/signup", signupMainHandler).Methods("GET")
}

// Handlers

func indexMainHandler(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "text/html; charset=UTF-8")

    // Call your model/s there
    mydata, err := models.GetMyDataFunction()
    if err != nil {
        // Handle your error there
        return
    }

    utils.ExecuteTemplate(w, "index.html", struct {
        Title                 string
        // Use your model data for templates there
        MyData             []models.MyData
        // Other models/data can go there if multiple data objects used per page.
    }{
        Title: "Main Page",
        MyData:             mydata,
    })
}

// func signupMainHandler(w http.ResponseWriter, r *http.Request) ...
// Basically repeat the same logic as in indexMainHandler function

。。。等等

如您所见，它们都属于

包路由

，但被划分为多个文件。文件名实际上并不重要。你可以随意命名。 模型位于

模型

目录中，并且也属于单个

包模型

包。 每次创建新路由文件时，请记住在

routes.go

文件中调用它

---

希望这对某人有所帮助。

您可能不想将这些文件拆分为单独的包。Go的包应该是可重用的库（通常是独立的）。不要将它们视为名称空间隔离的手段。这意味着我不能在单独的文件中定义路由并在另一个文件中使用它们？当然，你可以在不同的文件中定义它们，只是不要尝试在不同的“包”中定义它们。