Thanks for your question and for posting the full source text of your shortcode; very helpful.
You wrote “upload a new image with the same category attribute” but you do not say how you assigned terms to the new items. It’s possible the term assignment isn’t doing what you expect.
On the Media/Assistant submenu table you can display terms assigned to each item. Pull down the “Screen Options” menu and check the box for “Att. Categories”. Do the terms show up for the items you’ve highlighted?
If the terms are assigned correctly, then the cause is most likely your meta_key="slider_member_position" orderby="meta_value" sort order. If you have not assigned a value for the slider_member_position custom field to the missing items they will not show up in the [mla_gallery] display. The WordPress database query for sorting on a custom field eliminates any items that do not have a value for the custom field. You can correct the problem by assigning a slider_member_position value to every item you want to display.
By the way, your shortcode could be simplified, although it will work fine as-is. You could use the “simple taxonomy query” instead of the more complex taxonomy query:
[mla_gallery attachment_category=membres columns=50 size=full meta_key="slider_member_position" orderby="meta_value" order="ASC"]
You might also consider eliminating the columns=50 parameter, which means “display 50 items in each row of the gallery”. Try columns=1; with size=full you are probably seeing just one item per row anyway.
I hope that gives you the information you need to get the gallery display you want. I am marking this topic resolved, but please update it if you have any problems or further questions regarding the above suggestions. Thanks for your interest in the plugin.
Ok i see, but i don’t know where i can enter the “slider_member_position” value on my file..
I don’t see any custom field with this name on the edit page of this picture
If you go to the Media/Edit Media submenu screen for a given item you should see the “Custom Fields” meta box below the Description box. If not, pull down the Screen Options (upper-right corner) and check the box for Custom Fields.
The meta box will display all the custom fields that currently have a value. You won’t see slider_member_position for the problem items. Below the list is the “Add New Custom Field:” area. Pull down the “Select” dropdown control and you should see slider_member_position in the list. Select it, enter a value and click “Add Custom Field”.
If you don’t see slider_member_position in the list (unlikely) you can click “Enter new” and add it manually.
You can also define an MLA Custom Field mapping rule to add the field to the Quick Edit and Bulk Edit areas of the Media/Assistant submenu screen. See the Settings/Media Library Assistant Custom Fields tab for more information about that option.
Let me know if the above suggestions work for you.
