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Hooking a custom taxonomy to a post type

From: Create an Online Portfolio with WordPress

Video: Hooking a custom taxonomy to a post type

With the custom taxonomy created, it's time to attach it to some post types. What's cool here is that you can attach the same taxonomy to multiple different post types so that a visitor can get results from several different post types when navigating based on the taxonomy items. Actually hooking a taxonomy to a post type is very easy and I'll show you how. If we look at our current function, the registered_taxonomy function, it says meal-type and then it says array and it has the entire array of all the variables.

Hooking a custom taxonomy to a post type

With the custom taxonomy created, it's time to attach it to some post types. What's cool here is that you can attach the same taxonomy to multiple different post types so that a visitor can get results from several different post types when navigating based on the taxonomy items. Actually hooking a taxonomy to a post type is very easy and I'll show you how. If we look at our current function, the registered_taxonomy function, it says meal-type and then it says array and it has the entire array of all the variables.

If we now simply go in right before the array and add a post type name, so I will call recipes and then add a comma and save this, we can now go to the browser, reload it, and you will see that under Recipes we now have the taxonomy Meal type. You can go in and administer Meal type taxonomy just likely would otherwise, and you can go in and Add new recipe, and you will see Meal type appears on the side where you would normally see a category. But if we go to Photos or Videos, you will see we still don't have that taxonomy here.

So what we need to do now is instead of adding a single post type, we will add an array of post types. An array is simply what you see here. It says array(, and then you have a list of items. So what we can do is replace this recipes with an array, and then inside the array we can put our post types. So I will say, 'recipes', and 'photos', comma again, and finally videos.

Now it's very important here that you retain all of these quotation marks, that you have commas everywhere, and that you put this in the exact order you need it, because if you make any mistakes here, it will take down your entire site. It's simple to fix, but even a simple spelling error here could cause some thing that looks like a catastrophic failure. I will save this, reload the page, and you'll see the Meal type taxonomy now appears under Recipes, Photos, and Videos. We can also attach it to Posts, if we want to.

If you go down here you will see that right now we have Categories and Post Tags. If you go into our array again and simply add post, save it, reload admin, and you will see Meal type now also appears under Posts. Now you can see what happens here. We create a simple taxonomy and then we attach that taxonomy to the post types we want to attach it to and then everything automatically works. You can also take them out again if you don't want. For instance, I don't want the Meal type taxonomy to be attached to post so I will simply take it out from my array, save it, go back to admin and it's gone again.

So the true power here is that you have complete, detailed control of each item and where it appears. With a taxonomy hooked to several post types, we can now fully test and populate them with content. More importantly, we can also attach them to new posts for easier sorting. But this is a hierarchical taxonomy. What happens if we want to introduce a nonhierarchical taxonomy? That's the next step.

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This video is part of

Image for Create an Online Portfolio with WordPress
Create an Online Portfolio with WordPress

40 video lessons · 29572 viewers

Morten Rand-Hendriksen
Author

 
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  1. 6m 28s
    1. Welcome
      58s
    2. Using the exercise files
      3m 54s
    3. Using the code snippets file
      1m 36s
  2. 8m 31s
    1. What is an online portfolio?
      2m 43s
    2. Tour of the finished project
      3m 15s
    3. Setting up a WordPress development environment
      2m 33s
  3. 16m 10s
    1. Creating site architecture
      5m 1s
    2. Creating a child theme
      6m 7s
    3. Creating an external file to manage functions separately from the theme
      5m 2s
  4. 25m 26s
    1. What is a custom post type?
      2m 14s
    2. Setting up a custom post type
      6m 39s
    3. Adding advanced variables to the custom post type
      3m 35s
    4. Advanced custom post type functionalities
      4m 29s
    5. Changing the menu position of the custom post type
      3m 19s
    6. Adding a custom post type icon
      5m 10s
  5. 22m 8s
    1. What are custom taxonomies?
      3m 34s
    2. Setting up a basic custom taxonomy
      2m 52s
    3. Hooking a custom taxonomy to a post type
      3m 13s
    4. Adding advanced variables to a custom taxonomy
      3m 9s
    5. Using hierarchical and nonhierarchical custom taxonomies
      5m 54s
    6. Using custom taxonomies in admin
      3m 26s
  6. 25m 40s
    1. Populating content into the custom post types
      10m 54s
    2. Uploading videos to YouTube
      2m 22s
    3. Embedding YouTube videos in a custom post type
      4m 23s
    4. Uploading videos to WordPress
      8m 1s
  7. 39m 47s
    1. Creating custom post type templates
      6m 50s
    2. Adding taxonomy info to the custom post type template
      9m 13s
    3. Creating conditional custom taxonomy links
      4m 46s
    4. Handling multiple post type templates: Individual templates
      6m 25s
    5. Handling multiple post type templates: Consolidating everything in one file
      6m 21s
    6. Handling multiple post type templates: Making custom post types the default
      6m 12s
  8. 15m 23s
    1. Creating an index page for a custom post type
      8m 10s
    2. Creating a custom taxonomy index page
      7m 13s
  9. 12m 3s
    1. Creating a custom footer sidebar template
      6m 58s
    2. Displaying a list of links to the latest custom post type posts
      5m 5s
  10. 14m 58s
    1. Creating static pages for the front and the blog
      4m 54s
    2. Populating the menu with new index pages
      4m 52s
    3. Creating a contact page with a contact form
      5m 12s
  11. 5m 55s
    1. Including the abstraction layer in other stock themes
      5m 55s
  12. 1m 22s
    1. Next steps
      1m 22s

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