Redis Hash: HEXISTS

Redis HEXISTS Command

Redis HEXISTS command is used to check whether a hash field stored at key or not.

Here are some common uses and scenarios for the "HEXISTS" command:

• Field Presence Check: Verify the existence of a specific field in a hash.
• Conditional Logic: Execute operations based on the presence of fields within a hash.
• Data Validation: Ensure required fields are present before processing.
• Debugging and Monitoring: Check if fields exist for debugging or monitoring purposes.
• Configuration Management: Validate the existence of specific configuration settings stored in a hash.

Syntax:

HEXISTS KEY_NAME FIELD_NAME 

Available since

2.0.0.

Return Value

Integer reply, 1 or 0.

Return Value Type

Integer

• 1, if the hash contains a field.
• 0 if the hash does not contain a field, or key does not exist.

Example: Redis HEXISTS

127.0.0.1:6379> HMSET langhash lang1 "PHP" lang2 "JavaScript" lang3 "Python"
OK
127.0.0.1:6379> HEXISTS langhash lang1
(integer) 1
127.0.0.1:6379> HEXISTS langhash lang4
(integer) 0

Example: Redis HEXISTS another example

127.0.0.1:6379> HSET user email [email protected]
(integer) 1
127.0.0.1:6379> HEXISTS user email
(integer) 1
127.0.0.1:6379> HEXISTS user xyz
(integer) 0

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