[wp-trac] [WordPress Trac] #11354: WordPress Importer duplicates categories

[WordPress Trac]

#11354: WordPress Importer duplicates categories
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 Reporter:  briancolinger  |       Owner:                                          
     Type:  defect (bug)   |      Status:  new                                     
 Priority:  normal         |   Milestone:  2.9                                     
Component:  Import         |     Version:                                          
 Severity:  normal         |    Keywords:  duplicate categories, wordpress importer
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 The WordPress importer duplicates categories.
 This only seems to affect child categories.
 To reproduce, get an export file that has parent and children categories.
 Run the importer multiple times with the same file.
 View the category screen under Posts->Categories, you should see
 duplicated child categories.

 I've included a patch for the process_categories() method that fixes this
 by explicitly checking if each category_exists().
 I've included the same patch for process_tags() method. Tags do not
 duplicate, but wp_insert_term() is called without checking if the tag
 exists.

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Ticket URL: <http://core.trac.wordpress.org/ticket/11354>
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