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meta value has a date, how to use order by? indyank
I have a custom field called event_date (meta_key). Now value for this custom field are stored in "dd month year" format. Eg : 01 July 2013. How do I sort the wordpress query by this custom field? I have tried this in pre_get_posts filter fucntion, but it doesn't seem to work.. $query->set('meta_key' , 'event_date'); $query->set('orderby' , 'STR_TO_DATE( meta_value, "%d %M %Y" )'); I have found a few answers on the web where storing dates in yyyy/mm/dd format has worked with this. $query->set('meta_key' , 'event_date'); $query->set('orderby' , 'meta_value'); But in my case, the date is stored in a different format. meta_value is a column of longtext data type. Can someone pls. help.
What version of MySQL and PHP are you running? indyank
PHP - 5.4.9 Mysql - 5.5.31 But I think it is a wordpress limitation as I am trying to alter the main query in wordpress. lorax
Off the top of my head I agree with you. Have you tried creating your own query to see if you can manipulate the result set? indyank
Unfortunately, crating my own query wasn't an option. So the workaround was to somehow convert the existing meta-values for 'event_date' meta_keys into the ISO format "yyyy-mm-dd" and then this worked. $query->set('meta_key' , 'event_date'); $query->set('orderby' , 'meta_value'); Thanks lorax.