We can add new taxonomy to any new custom post types or built-in post types. Same time we can add new admin cols to any admin end post listing using hooks & filters. But sometimes we notice that we add new taxonomy but we can not show them as admin col. To be more specific let me show default post type “post” has a taxonomy “category” and it has option in post type post listing to show category as column in the table. See the below screenshot.
Now, see the below example: I tried to add a new taxonomy “cbxgooglemapcat” for a custom post type “cbxgooglemap” and it doesn’t show the new taxonomy as admin col. What did I do wrong?
Then I was searching and checking the wordpress core codes and found that there is a default argument for initializing taxonomy for ‘show_admin_column’ and that value is by default ‘false’. I did wrong or missed this line
//'show_admin_column' => true, //see this line
I recorded a video describing the issue and it will be more easy to understand