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Is there a function in the redis-rb gem that returns a list of all the keys stored in the DB? My end goal is to iterate over all my key/value pairs and do perform some action on them.
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To list the keys in the Redis data store, use the KEYS command followed by a specific pattern. Redis will search the keys for all the keys matching the specified pattern. In our example, we can use an asterisk (*) to match all the keys in the data store to get all the keys.
A Redis server has 16 databases by default. You can check the actual number by running redis-cli config get databases. In interactive mode, the database number is displayed in the prompt within square braces. For example, 127.0. 0.1:6379[13] shows that the 13th database is in use.
By clicking on a Redis key name, all its contents will open in a new editor tab. With a collection type Redis key, clicking on it will reveal the individual elements under the key name.
The Redis KEYS command returns all the keys in the database that match a pattern (or all the keys in the key space). Similar commands for fetching all the fields stored in a hash is HGETALL and for all fetching the members of a SMEMBERS. The keys in Redis themselves are stored in a dictionary (aka a hash table).
Sure, the redis-rb exposes all of the Redis commands and represents them as methods on your client object.
redis.keys('*') If you have any substantial amount of records in your db, kernel will kill your redis.keys because it will be taking too much RAM.
What you want is extracting keys in batches. redis-rb has a wonderful method for this (not present in redis itself):
redis.scan_each(match: 'user:*') do |resume_key_name| resume_key_name #=> "user:12" end If you want all the keys, just don't use the match option.
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