taxonomy-attachment_tag.php dont work with permalink

Thank you for your question and for taking the time to post the PHP code of your taxonomy-attachment_tag.php file; that’s very helpful. It looks like you also found the earlier “Displaying Tags in Text Format” support topic and have adapted some of that code for your application; that’s great research.

You have two [mla_gallery] shortcodes in your file, and I can give you a few comments on them that might get you a better result. The first shortcode is:

[mla_gallery post_mime_type=application link="file" size=icon category="federal" taxonomy="media-category" mla_caption="{+title+} {+description+} {+date+}" s="{+request:$tag+}" ]

Two of the parameters in this shortcode are not doing what you expect:

1. taxonomy="media-category" is ignored. There is no taxonomy parameter defined for the shortode. If you are trying to find the items assigned to a particular term, you would code something like media-category="some-slug-value" where media-category is the taxonomy and some-slug-value is the slug for a specific term. Of course, you would also have to define media-category as a custom taxonomy of your own (MLA provides attachment_category and attachment_tag for your use).
2. s="{+request:$tag+}" is not doing anything because the {+request:$tag+} part is returning an empty string and s="" will match anything. If you have defined “tag” as a query argument in your URL, you would use {+request:tag+} to populate the “s” parameter. That would search for whatever value “tag” has in the Title and Description fields of your items. If you are searching for a taxonomy term, you would code something like media-category="{+request:tag+}".

Your second shortcode is:

sprintf( '[mla_gallery %1$s="%2$s" mla_caption="{+title+}" columns="5" numberposts="1000" order=DESC]', $wp_query->query_vars['taxonomy'], $wp_query->query_vars['term'] ) );

That shortcode looks fine to me, assuming you are looking for images assigned to the current term in the attachment_tag taxonomy (since your file name is taxonomy-attachment_tag.php). If you are not looking for images, try adding something like post_mime_type=application size=icon to find items such as PDF documents.

I do not know why the /attachment_tag/azure/ Permalink does not work and the ?attachment_tag=azure variation does work. On my test system, both of these forms return the same result. You could try going to the Settings/Permalinks page and clicking “Save Changes” to update the .htaccess file. You could also try copying your taxonomy-attachment_tag.php file to taxonomy.php and see if that works. If not, your theme may be doing something with the URL rewrite rules.

I will leave this topic unresolved for now. Let me know if any of the suggestions work for you.

Thank you for your response; I an sorry to hear you are still having this issue.

I am not sure I can be of more help, since I do not have access to your site and the theme you are using. Can you tell me what your “Permalinks” Settings are? Do you have anything in the Category base and Tag base fields? Are there any theme-specific permalinks settings?

How do you generate the “/attachment_tag/azure/” and/or “?attachment_tag=azure” links? Are you sure the links you generate match the Permalinks setting for your site?

As I said, this does not look like an MLA issue; it is some problem with your WordPress or Theme Permalinks structure. If you can answer the above questions I will give it some more thought.