[BUG] sessions/sessiondb/badger package not compatible with badger v1.6.0

[bastengao]

Describe the bug

import (
	"github.com/kataras/iris"
	"github.com/kataras/iris/sessions"
	"github.com/kataras/iris/sessions/sessiondb/badger"
)

func init() {
	db, err := badger.New("tmp/badger_data")
	if err != nil {
		panic(err)
	}
	sess.UseDatabase(db)
}

go.mod like this

require (
	github.com/dgraph-io/badger v1.6.0 // indirect
	github.com/kataras/iris v11.1.1+incompatible
        // ...
)

run go run or go build will print these errors

# github.com/kataras/iris/sessions/sessiondb/badger
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:56:6: opts.Dir undefined (type func(string) badger.Options has no field or method Dir)
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:57:6: opts.ValueDir undefined (type func(string) badger.Options has no field or method ValueDir)
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:59:29: cannot use opts (type func(string) badger.Options) as type badger.Options in argument to badger.Open
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:81:18: too many arguments in call to txn.Commit
	have (nil)
	want ()
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:94:13: txn.SetWithTTL undefined (type *badger.Txn has no field or method SetWithTTL)
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:132:13: txn.SetWithTTL undefined (type *badger.Txn has no field or method SetWithTTL)
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:154:19: assignment mismatch: 2 variables but item.Value returns 1 values
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:154:32: not enough arguments in call to item.Value
	have ()
	want (func([]byte) error)
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:195:19: assignment mismatch: 2 variables but item.Value returns 1 values
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:195:32: not enough arguments in call to item.Value
	have ()
	want (func([]byte) error)
../../../../go/pkg/mod/github.com/kataras/[email protected]+incompatible/sessions/sessiondb/badger/database.go:195:19: too many errors

Expected behavior
Use badger as session db correctly.

Desktop (please complete the following information):

• OS: macOS Mojave

Additional context
go version 1.13

I see badger 1.6.0 contains break changes https://github.com/dgraph-io/badger/releases/tag/v1.6.0, it is not compatible with sessions/sessiondb/badger package.

When I change badger version to v1.5.5 in go.mod file, it works.

require (
	github.com/dgraph-io/badger v1.5.5 // indirect
	github.com/kataras/iris v11.1.1+incompatible
        // ...
)

[kataras]

@bastengao Iris is compatible with latest badger, don't worry. The problem here is that you are using an older version. Just go get github.com/kataras/[email protected] https://github.com/kataras/iris/wiki/Installation

[bastengao]

I tried it, but produced this issue #1355

[kataras]

@bastengao Please vote at: #1370