Quote:
Originally Posted by ownedbycats
I have a user category, @On Kobo. I have an item in that category, '[Send to Device]' (from an enumerated #kobostatus) column. A lot of times, it's unused - I use it to keep track of books to re-upload to device.
Recently. I've found [Send to Device] go missing from my user category several times. (Not hidden; I have to open the editor and re-add it.) This does not happen with any other items in my user category, which makes me think it may be related to [Send to Device] not always being in-use and perhaps somehow getting removed due to being empty.
Is this a feature that I somehow never noticed before, a bug, or just some weird gremlin?
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If '[Send to Device]' is a category item in a user category then it will be removed if it exists in no book. Why? Because an item must actually exist in some book for it to be in calibre's database. Note that information about the items, e.g., their links, will also disappear.
When it gets removed is a harder question. IIRC using Manage Categories will remove any leftover non-existent items. Probably manipulating the parent user category (right-clicks etc) will clean the items.
And to head off the probably enhancement request: no, I don't want to either leave non-existent items in the category list or add some way to lock non-existant items in a user category. The first would be unreliable and would lead to a very large category list, costing performance when displaying them. The second is more work than I want to do.
You can solve this problem by having a special book that contains items that you want never to disappear.