Thread: Modified Date on Titles.
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Old 06-15-2022, 10:37 PM   #28
davidfor
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Quote:
Originally Posted by BetterRed View Post
I have a vague memory of someone telling me that the reason the built-in last_modified date exists and behaves as it does is/was related to synchronising the metadata in a calibre library with the metadata on devices.
I don't know of any devices that do that. But, it wouldn't be unreasonable to. And I considered it for the KoboTouch driver. The issue is knowing when the device was last connected. That isn't stored anywhere. There is a last connection date in the driveinfo.calibre file, but, it is updated as soon as the device is connected. Which isn't useful for working out the changes since the last time the device was connected.

But, the modified date is used as part of the backup of metadata to the OPF files in the book directories. Changing a tag like has been discussed will trigger the update of the modified date and then OPFs to be updated.
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