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Add delete_multi method to cache #36927

merged 1 commit into from Aug 26, 2019


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@peterzhu2118 peterzhu2118 commented Aug 13, 2019


Adds ActiveSupport::Cache::Store#delete_multi to delete an array of keys from the cache.

For most implementations, this just calls ActiveSupport::Cache::Store#delete n times, but Redis supports deleting an array of keys. This can improve performance because it turns what is previously n delete calls into a single call.

Memcached does not support multi delete.

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@jeremy jeremy left a comment

Nice feature! Observe the interaction between read_multi (public API implemented once in base class) and read_multi_entries (private implementation; default in base class, overridden in subclasses). You can follow this pattern with delete_multi (public API) and delete_multi_entries (private implementation) as well.

@peterzhu2118 peterzhu2118 force-pushed the cache-delete-multi branch 4 times, most recently from e0bcb4e to a862d59 Compare Aug 15, 2019
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@peterzhu2118 peterzhu2118 commented Aug 15, 2019

Hey @jeremy, thanks for the review! I've updated the implementation with your suggestions, please take another look!

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@peterzhu2118 peterzhu2118 commented Aug 20, 2019

Hey @jeremy, could I get another review please?

@jeremy jeremy merged commit 59e746d into rails:master Aug 26, 2019
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@jewilmeer jewilmeer commented Sep 20, 2019

Awesome! We used a custom implementation and can now switch back to the default again! Thanks @peterzhu2118

@cache.write("foo", "bar")
assert @cache.exist?("foo")
@cache.write("hello", "world")
assert @cache.exist?("foo")

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it it the good assertion here?

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4 participants