missing go.sum entry for module providing package <package_name>

Question

Using the buffalo framework, after bootstraping it via buffalo new <project_name>

I am trying to run buffalo dev Expecting to see:

project running on port 3000

But I am getting those error messages instead

actions/app.go:4:2: missing go.sum entry for module providing package github.com/gobuffalo/buffalo (imported by sc_api/actions); to add:go get sc_api/actions

actions/app.go:13:2: missing go.sum entry for module providing package github.com/gobuffalo/mw-csrf (imported by sc_api/actions); to add: go get sc_api/actions

actions/app.go has been generated by buffalo, but in case you are wondering the error does match the import statement in this file.

// app.go
package actions

import (
    "github.com/gobuffalo/buffalo"  // 1rst line
    "github.com/gobuffalo/envy"
    forcessl "github.com/gobuffalo/mw-forcessl"
    paramlogger "github.com/gobuffalo/mw-paramlogger"
    "github.com/unrolled/secure"

    "sc_api/models"

    "github.com/gobuffalo/buffalo-pop/v2/pop/popmw"
    csrf "github.com/gobuffalo/mw-csrf"  // 2nd line
    i18n "github.com/gobuffalo/mw-i18n"
    "github.com/gobuffalo/packr/v2"
)

What does it mean ? How do I fix it ?

Sturges

Answer 1

It seems the issue has nothing to do with Buffalo and more with my lack of understanding of Go in general.

running go mod tidy solved the issue

This command goes through the go.mod file to resolve dependencies:

• delete the packages that are not needed
• download those needed
• update the go.sum

I am still unsure which of those actions did the trick... but the project runs now.

ps: I'll let the in-depth explanation/correction to the Go wizard out here.

Sturges

Total go noob here too, this helped me! – Ralina

Cool, faced same issue & it helped :) – Tamarisk

Update dependencies and broke my code, now I can't get it back to its original state – Cypress

Thanks this I am new on go, so forget to run this in existing project when get you clone a new projects. – Vitelline

go mod tidy -e worked for me. – Weasel

Answer 2

i got the same issue when building a docker image. i tried go mod tidy and also go get -t . as suggested here https://github.com/golang/go/issues/44129. both didnt worked for me though but updating my docker builder to version 1.18 worked.

Soberminded

I had the same issue while using FROM golang:1.16-alpine as builder in dockerfile, upgrading the version to 1.18 solved the issue. – Indeterminable

Answer 3

I use go mod tidy -e solved the problem. The -e flag (added in Go 1.16) causes go mod tidy to attempt to proceed despite errors encountered while loading packages.The more about mod tidy: https://go.dev/ref/mod#go-mod-tidy

October

saved xmas and it's not even xmas thank you – Matrices

Answer 4

go get -t did the trick for me.

read up on the difference here

Geier