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ZADD

Syntax​

ZADD key [NX | XX] [GT | LT] [CH] [INCR] score member [score member...]

Module​

sortedset

Categories​

fast sortedset write

Description​

Adds all the specified members with the specified scores to the sorted set at the key.

Options​

  • NX - only adds the member if it currently does not exist in the sorted set.
  • XX - only updates the scores of members that exist in the sorted set.
  • GT - only updates the score if the new score is greater than the current score.
  • LT - only updates the score if the new score is less than the current score.
  • CH - modifies the result to return total number of members changed + added, instead of only new members added.
  • INCR - modifies the command to act like ZINCRBY, only one score/member pair can be specified in this mode.

Examples​

Add elements to sorted set:

vault, err := echovault.NewEchoVault()
if err != nil {
  log.Fatal(err)
}
changedCount, err := vault.ZAdd( 
  "key",
  map[string]float64{"member1": 2.5, "member2": 1.25, "member3": 3},
  echovault.ZAddOptions{},
)

Add elements to sorted set, skipping members that already exist in the set:

vault, err := echovault.NewEchoVault()
if err != nil {
  log.Fatal(err)
}
changedCount, err := vault.ZAdd(
  "key",
  map[string]float64{"member1": 2.5, "member2": 1.25, "member3": 3, "member4": 4},
  echovault.ZAddOptions{NX: true},
)

Increment the element by the specified score:

vault, err := echovault.NewEchoVault()
if err != nil {
  log.Fatal(err)
}
changedCount, err := vault.ZAdd(
  "key",
  map[string]float64{"member1": 5.75},
  echovault.ZAddOptions{INCR: true},
)