[wp-trac] [WordPress Trac] #15049: postavoid add_metadata to insert duplicated entries

[WordPress Trac]

#15049: postavoid add_metadata to insert duplicated entries
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 Reporter:  leogermani   |       Owner:                                
     Type:  enhancement  |      Status:  new                           
 Priority:  normal       |   Milestone:  Awaiting Review               
Component:  Database     |     Version:  3.1                           
 Severity:  normal       |    Keywords:  metadata, post_meta, user_meta
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 when calling add_metadata, check if there is already an entry with the
 same object id, meta_key, and meta_value. If there is, return false so we
 dont have duplicated entries.

 The unique paramater of the add_metadata does not handle with that, since
 it only cares about the meta_key not beeing duplicated.

 When playing with multiple metadatas with the same meta_key, very often
 you have to check if a value already exists before adding it. I beleive
 add_metadata should handle it automatically.

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Ticket URL: <http://core.trac.wordpress.org/ticket/15049>
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