Delete redis key matching pattern using ruby

Question

I want to delete all redis keys defined under namespace "datetime_filter" in ruby (maintenance task). How to do this ?

antirez · Accepted Answer · 2015-05-14 11:46:11Z

6

The right way to do this if you don't want to block the server is to use the SCAN command. The command will provide you an iterator returning only the keys matching your pattern if you wish (in this case it is appropriate to use the MATCH option for sure). The Ruby script will just have to iterate and delete.

So:

WHILE keys = SCAN MATCH datetime_filter*
    FOREACH key in keys DEL key

answered May 14, 2015 at 11:46

antirez

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Community · Accepted Answer · 2017-05-23 11:43:39Z

4

Try this -

 $redis.del(datetime_filter_key)

and follow following approach -

In redis, how do i remove keys?

edited May 23, 2017 at 11:43

CommunityBot

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answered May 14, 2015 at 11:41

Amit Suroliya

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Comments

builder-7000 · Accepted Answer · 2021-05-18 03:30:08Z

2

You could use:

Rails.cache.redis.keys.grep(/pattern/).each do |k|
  Rails.cache.redis.del(k)
end

answered May 18, 2021 at 3:30

builder-7000

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