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39 lines
823 B
Go
39 lines
823 B
Go
package hash
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import "github.com/nalgeon/redka/internal/redis"
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// Sets the value of a field in a hash only when the field doesn't exist.
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// HSETNX key field value
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// https://redis.io/commands/hsetnx
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type HSetNX struct {
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redis.BaseCmd
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Key string
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Field string
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Value []byte
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}
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func ParseHSetNX(b redis.BaseCmd) (*HSetNX, error) {
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cmd := &HSetNX{BaseCmd: b}
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if len(cmd.Args()) != 3 {
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return cmd, redis.ErrInvalidArgNum
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}
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cmd.Key = string(cmd.Args()[0])
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cmd.Field = string(cmd.Args()[1])
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cmd.Value = cmd.Args()[2]
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return cmd, nil
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}
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func (cmd *HSetNX) Run(w redis.Writer, red redis.Redka) (any, error) {
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ok, err := red.Hash().SetNotExists(cmd.Key, cmd.Field, cmd.Value)
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if err != nil {
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w.WriteError(cmd.Error(err))
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return nil, err
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}
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if ok {
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w.WriteInt(1)
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} else {
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w.WriteInt(0)
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}
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return ok, nil
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}
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