go - 无法导入 gorilla/mux(github.com/gorilla/mux@v1.7.4 : is explicitly required in go. mod，但在 vendor/modules.txt 中未标记为显式)

Question

在 Go 中，我尝试了简单的数据库连接。我需要导入 gorilla/mux ，但我做不到。

我正在使用 VS 代码。之后 cd转到我的项目目录，我创建了 main.go确实跑了go get -u github.com/gorilla/mux
这里是 main.go

package main

import (
    "database/sql"
    "fmt"
    "github.com/gorilla/mux"
    _ "github.com/lib/pq"
)

const (
    host     = "localhost"
    port     = 3000
    user     = "postgres"
    password = "postgres"
    dbname   = "test1"
)

func main() {
    psqlInfo := fmt.Sprintf("host=%s port=%d user=%s "+
        "password=%s dbname=%s sslmode=disable",
        host, port, user, password, dbname)

    db, err := sql.Open("postgres", psqlInfo)
    if err != nil {
        panic(err)
    }
    defer db.Close()

    err = db.Ping()
    if err != nil {
      panic(err)
    }

    fmt.Println("Successfully connected!")
}

[注意，在执行 go get -u github.com/gorilla/mux之后终端展示

C:\Go\src\github.com\IamFrost\go-rest-api>go get -v -u github.com/gorilla/mux
go: golang.org/x/text upgrade => v0.3.2
go: golang.org/x/crypto upgrade => v0.0.0-20200429183012-4b2356b1ed79
go: golang.org/x/sys upgrade => v0.0.0-20200430082407-1f5687305801
go: golang.org/x/net upgrade => v0.0.0-20200425230154-ff2c4b7c35a0
go: downloading golang.org/x/sys v0.0.0-20200430082407-1f5687305801
golang.org/x/sys/cpu
golang.org/x/crypto/chacha20poly1305
crypto/tls

]


看我在迷你 map 中没有其他语法错误。在红色标记处，当我放鼠标时，悬停文本对我来说很有趣:

1) imported but not used
但下一行

2) no package for import github.com/gorilla/mux )

大声笑这不是违背 1) 吗？

有人请解释为什么会这样

然而，

使用后 go build在 终端

这是终端:

C:\Go\src\github.com\IamFrost\go-rest-api>go build
go: inconsistent vendoring in C:\Go\src:
        github.com/gorilla/mux@v1.7.4: is explicitly required in go.mod, but not marked as explicit in vendor/modules.txt
        github.com/lib/pq@v1.4.0: is explicitly required in go.mod, but not marked as explicit in vendor/modules.txt
        golang.org/x/crypto@v0.0.0-20200429183012-4b2356b1ed79: is explicitly required in go.mod, but not marked as explicit in vendor/modules.txt
        golang.org/x/net@v0.0.0-20200425230154-ff2c4b7c35a0: is explicitly required in go.mod, but not marked as explicit in vendor/modules.txt
        golang.org/x/sys@v0.0.0-20200430082407-1f5687305801: is explicitly required in go.mod, but not marked as explicit in vendor/modules.txt
        golang.org/x/crypto@v0.0.0-20200128174031-69ecbb4d6d5d: is marked as explicit in vendor/modules.txt, but not explicitly required in go.mod
        golang.org/x/net@v0.0.0-20191126235420-ef20fe5d7933: is marked as explicit in vendor/modules.txt, but not explicitly required in go.mod
        golang.org/x/sys@v0.0.0-20200201011859-915c9c3d4ccf: is marked as explicit in vendor/modules.txt, but not explicitly required in go.mod

run 'go mod vendor' to sync, or use -mod=mod or -mod=readonly to ignore the vendor directory

[注意:我也做了'go mod vendor'，但没有变化]

所以有人指出我为什么不能导入 gorilla/mux或 pq .

我还需要做什么？

(请解释一下这是什么意思？ is explicitly required in go.mod, but not marked as explicit in vendor/modules.txt)

Answer 1

这是我为我修复它的方法:

go get ./...
go mod vendor

如果你的 Go 版本小于 1.13那么，你应该在前面加上 GO111MODULE=on 在上面的命令中。