using badger as shown in readme does not work

[l0ngest]

Hi there, thanks in advance for your time. Looking at this part of the readme:

import (
  "log"
  "github.com/dgraph-io/badger/v4"
  c "github.com/ostafen/clover"
  badgerstore "github.com/ostafen/clover/v2/store/badger"
)

...

// by default, Bolt will be used internally
db, _ := c.Open("clover-db")

// use OpenWithStore() if you want to select a different storage backend
store, _ := badgerstore.Open(badger.DefaultOptions("").WithInMemory(true)) // opens a badger in memory database
db, _ := c.OpenWithStore(store)

defer db.Close() // remember to close the db when you have done

I have copy-pasted this exactly, but on this line:
store, _ := badgerstore.Open(badger.DefaultOptions("").WithInMemory(true)) // opens a badger in memory database

I get this error:
"Cannot use 'badger.DefaultOptions("").WithInMemory(true)' (type "github.com/dgraph-io/badger/v4".Options) as the type "github.com/dgraph-io/badger/v3".Options"

It appears that if I use badger v3 it works; however, given that the readme example uses badger v4 I spent a while thinking I've done something wrong. Is badger v4 not supported?

[ostafen]

Are you sure you are pulling the latest version?
Clover is using badger v4

[MaximeBellou]

Hello,
I have the exact same issue.
With go version go1.22.1 darwin/arm64. I create a new project, make a go mod init .
I create a main.go file, and paste this code :

package main

import (
	"github.com/dgraph-io/badger/v4"
	c "github.com/ostafen/clover"
	badgerstore "github.com/ostafen/clover/v2/store/badger"
)

func main() {
	// use OpenWithStore() if you want to select a different storage backend
	store, _ := badgerstore.Open(badger.DefaultOptions("").WithInMemory(true)) // opens a badger in memory database
	db, _ := c.OpenWithStore(store)

	defer db.Close() // remember to close the db when you have done
}

I run go mod tidy and get this go.mod:

module new-project

go 1.22.1

require (
	github.com/dgraph-io/badger/v4 v4.3.1
	github.com/ostafen/clover v1.2.0
	github.com/ostafen/clover/v2 v2.0.0-alpha.3
)

require (
	github.com/cespare/xxhash v1.1.0 // indirect
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/dgraph-io/badger/v3 v3.2103.2 // indirect
	github.com/dgraph-io/ristretto v1.0.0 // indirect
	github.com/dustin/go-humanize v1.0.1 // indirect
	github.com/gogo/protobuf v1.3.2 // indirect
	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
	github.com/golang/protobuf v1.5.4 // indirect
	github.com/golang/snappy v0.0.4 // indirect
	github.com/google/flatbuffers v24.3.25+incompatible // indirect
	github.com/klauspost/compress v1.17.10 // indirect
	github.com/pkg/errors v0.9.1 // indirect
	github.com/satori/go.uuid v1.2.0 // indirect
	go.opencensus.io v0.24.0 // indirect
	golang.org/x/net v0.29.0 // indirect
	golang.org/x/sys v0.25.0 // indirect
	google.golang.org/protobuf v1.33.0 // indirect
)

From this moment, I get this error : Cannot use 'badger.DefaultOptions("").WithInMemory(true)' (type "github.com/dgraph-io/badger/v4".Options) as the type "github.com/dgraph-io/badger/v3".Options

and Cannot resolve c.OpenWithStore

Changing the import c "github.com/ostafen/clover" into c "github.com/ostafen/clover/v2" resolves the "Cannot resolve c.OpenWithStore" error.

Changing the import "github.com/dgraph-io/badger/v4" into "github.com/dgraph-io/badger/v3" resolve the WithInMemory issue.

But continuing in the Readme file, if I try to use db.FindAll(c.NewQuery("todos")) , I get a Unresolved reference NewQuery error.
To solve this error, I have to import "github.com/ostafen/clover/v2/query" and use this code : docs, _ := db.FindAll(query.NewQuery("todos"))

[willie68]

I encountered the same problem.

Using go get github.com/ostafen/clover/v2 as described in the documentation, I get the latest tagged V2 version, which still uses Badger V3.

My workaround is to replace the line github.com/ostafen/clover/v2 in go.mod after the command with github.com/ostafen/clover/v2 v2.0.0-20250909061301-de2a323975a6. This uses the latest version of main.
After that call go mod tidy to resolve all needed dependencies.