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humanmade / Backdrop

Backdrop is a simple library that does one thing: allows you to run one-off tasks in the background.
GNU General Public License v2.0
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Limit the key length so we avoid going over the transient name limit #6

Closed willmot closed 10 years ago

willmot commented 10 years ago

The option_name column is VARCHAR 64.

In practise this means transient names should be no longer than 40 characters.

From http://codex.wordpress.org/Transients_API#Using_Transients

(string) a unique identifier for your cached data (this should be 45 characters or less in length.. NOTE: if using a site transient, it should be 40 characters or less in length)

Trac ticket http://core.trac.wordpress.org/ticket/15058

Given get_unique_id uses sha1 which returns a 40 character string which in turn is then concatenated onto hm_backdrop-. This creates a string which is 62 characters long.

Solution is to ensure get_unique_id only returns a string that is 28 characters long.