How to determine custom column type?

Kelzan · 06-04-2023, 04:57 PM

I've been working on an an interface plugin that enables audiobook support through M3U files, which are simple playlists for the actual audiobook audiofiles which are stored outside of Calibre.

I've got it working pretty well for my needs, but decided to clean it up sufficiently to share with the community. Part of this effort is to add the ability to define which custom columns to use for importing the various audiofile metadata (sample rate, bitrate, # files, duration, etc.)

I want to be able to check that the user has configured the desired custom columns correctly. It's pretty straightforward to check and verify that a custom column exists or not, but what's the best way of making sure that the column is of the correct type (integer, floating point, text, etc.)? Looking through calibre code I've seen mention of field metadata, but I couldn't quite figure out the best way to access it.

What would be the best way to check custom column type?

Thanks in advance for any help!

theducks · 06-04-2023, 05:24 PM

Look at the Count Pages Plugin configuration for storing results, for ideas.
Each result to be configured, only presents custom columns of the correct type

Kelzan · 06-05-2023, 01:12 AM

Quote:

Originally Posted by theducks

Look at the Count Pages Plugin configuration for storing results, for ideas.
Each result to be configured, only presents custom columns of the correct type

Awesome, thanks, that helps. I see what they did in their get_custom_columns() routine in config.py, I'll give that a try.

06-04-2023, 04:57 PM	#1
Kelzan Member Posts: 11 Karma: 10 Join Date: Jun 2023 Location: Austin, TX USA Device: Kindle, Ipad Pro	How to determine custom column type? I've been working on an an interface plugin that enables audiobook support through M3U files, which are simple playlists for the actual audiobook audiofiles which are stored outside of Calibre. I've got it working pretty well for my needs, but decided to clean it up sufficiently to share with the community. Part of this effort is to add the ability to define which custom columns to use for importing the various audiofile metadata (sample rate, bitrate, # files, duration, etc.) I want to be able to check that the user has configured the desired custom columns correctly. It's pretty straightforward to check and verify that a custom column exists or not, but what's the best way of making sure that the column is of the correct type (integer, floating point, text, etc.)? Looking through calibre code I've seen mention of field metadata, but I couldn't quite figure out the best way to access it. What would be the best way to check custom column type? Thanks in advance for any help!

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06-04-2023, 05:24 PM	#2
theducks Well trained by Cats Posts: 29,818 Karma: 54830978 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Look at the Count Pages Plugin configuration for storing results, for ideas. Each result to be configured, only presents custom columns of the correct type