Solve those Peski 404 errors you're getting with WordPress Custom Post TypesWordPress 3.0’s Custom Post Types are undoubtedly a valuable feature. They allow you to extend the platform like never before, but also can occasionally cause some problems when developing; most commonly 404 issues.

The main issues I come across are problems with permalinks, pagination and single postings. Here’s the rundown I go through to fix these issues:

1. Single Custom Post Type 404 Error

Scenario: You’re querying the custom post types properly but when you click on a link to an individual post it goes to a 404 error page rather than single posting.

You CANNOT have a Custom Post Type and Page with the Same Name

Solution: Rename the Custom Post Type or Page with the same name so they are different. If you elect to change the custom post type name you will need to do a MySQL query to find-and-replace all post types with the old name to the new one. Don’t worry, this isn’t that hard. Here’s a MySQL query that will effectively change the post_type name of the old name to the new one:

Also, keep in mind that if you change the Custom Post Type name you may have to do some 301 redirects as this will change the slugs and Google may get a little cranky.

2. WP-PageNavi with Custom Post Types Shows 404 Error

Scenario: You’re using WP-PageNavi for pagination and for when you click on the page items it returns a 404 error page rather than the actual post. You also have your permalink structure set to other than default ( /%category%/%postname%/ etc.)

Are You Querying Posts Properly?

Solution: Change your query code to check to see if there is a paged query variable and if not setting it to 1:

Then refresh your permalinks by visting the permalinks option panel under the settings section in your WordPress backend.

3. Pagination Fix for Categories and Custom Post Types

Scenario: You have registered both a custom post type and custom taxonomies and pagination returns a 404 page for the categories.

Install the Category Pagination Fix Plugin

There’s a great plugin that will fix the custom taxonomy pagination issue without you even to have to touch code: wordpress category pagination fix

Have a Solution or Different Issue? Help us out.

There’s no denying the power behind custom post types. They just like to act a bit funky sometimes. A lot of the issue arise from permalink structures and a lot of behind-the-scenes code.

Please, don’t hesitate to comment below with your problems, solutions, changes or recommendations. We hope you found some value from this post.

Devin Walker is a San Diego-based WordPress Developer and enthusiast. He is the author of several popular and highly-rated WordPress themes and plugins. In his free time he enjoys playing Golf and traveling.

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