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10 changes: 10 additions & 0 deletions cluster.go
Original file line number Diff line number Diff line change
Expand Up @@ -1407,6 +1407,16 @@ func (c *ClusterClient) cmdsMoved(
return nil
}

// NewTransation returns a transaction, the related slot is determined by key.
func (c *ClusterClient) NewTransation(ctx context.Context, key string) (*Tx, error) {
slot := hashtag.Slot(key)
node, err := c.slotMasterNode(ctx, slot)
if err != nil {
return nil, err
}
return node.Client.newTx(), nil
}

func (c *ClusterClient) Watch(ctx context.Context, fn func(*Tx) error, keys ...string) error {
if len(keys) == 0 {
return fmt.Errorf("redis: Watch requires at least one key")
Expand Down
2 changes: 1 addition & 1 deletion go.mod
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ module github.com/go-redis/redis/v9
go 1.17

require (
github.com/cespare/xxhash/v2 v2.1.2
github.com/cespare/xxhash/v2 v2.2.0
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f
github.com/onsi/ginkgo v1.16.5
github.com/onsi/gomega v1.20.0
Expand Down
4 changes: 2 additions & 2 deletions go.sum
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
Expand Down
14 changes: 14 additions & 0 deletions redis.go
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ import (
"time"

"github.com/go-redis/redis/v9/internal"
"github.com/go-redis/redis/v9/internal/hashtag"
"github.com/go-redis/redis/v9/internal/pool"
"github.com/go-redis/redis/v9/internal/proto"
)
Expand Down Expand Up @@ -757,3 +758,16 @@ func (c *Conn) TxPipeline() Pipeliner {
pipe.init()
return &pipe
}

func AreKeysInSameSlot(keys ...string) bool {
if len(keys) == 0 {
return true
}
slot := hashtag.Slot(keys[0])
for _, key := range keys[1:] {
if hashtag.Slot(key) != slot {
return false
}
}
return true
}