[wp-trac] [WordPress Trac] #3683: It is possible to create multiple categories with the same name and same slug

[WordPress Trac]

#3683: It is possible to create multiple categories with the same name and same
slug
----------------------------+-----------------------------------------------
 Reporter:  johnbillion     |       Owner:  anonymous 
     Type:  defect          |      Status:  new       
 Priority:  lowest          |   Milestone:            
Component:  Administration  |     Version:  2.1       
 Severity:  trivial         |    Keywords:  categories
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 This is a trivial one, I know.

 It is possible to create multiple categories with the same name and/or
 same slug, and doing so breaks all concerned categories.

 To recreate:

 1. Go to Manage -> Categories in the admin panel.

 2. Create a new category.

 3. Create another category with the same name and/or same slug.

 4. Place some posts into these categories (so they show up on the blog)
 and then attempt to browse one of the categories via the blog. A 404 Not
 Found error is returned on all categories concerned.

 =================

 Desired Behaviour:

 Either the user is alerted that they are attempting to create a duplicate
 category, or the duplicate category is created with a numerical suffix on
 the slug (eg. articles-2) much the same as is done with multiple blog
 posts that have the same titles.

 IMO the first option would be preferable.

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Ticket URL: <http://trac.wordpress.org/ticket/3683>
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