series index decimals

feuille · 05-28-2025, 10:43 AM

Is there a reason why the decimals of the series index are formatted with only two digits? (method "def fmt_sidx(i, fmt='%.2f', use_roman=False) in "calibre\ebooks\metadata\__init__.py")

In a metadata plugin, I create the series index from a given volume and issue number in the form "volume.issue".

In most cases, the issue number runs within the volume number (usually a year), so two decimal places are sufficient.

However, there are also cases where the issue number runs independently from 1 to hundreds of issues (e.g., New Worlds Science Fiction Magazine), so issue numbers above 99 may be stored in the series index but not displayed.

kovidgoyal · 05-28-2025, 11:48 AM

You can create a custom column with a template at format it with as many decimal points as you like, or create a seaparate column to store volume number. calibre's builtin series field supports two digit precision as that covers the vast majority of use cases and and having more would just impose costs on everyone for a very niche use case.

05-28-2025, 10:43 AM	#1
feuille Connoisseur Posts: 64 Karma: 666 Join Date: May 2020 Location: Germany Device: android smartphone + tablet with Moon Reader and ReadEra Apps.	series index decimals Is there a reason why the decimals of the series index are formatted with only two digits? (method "def fmt_sidx(i, fmt='%.2f', use_roman=False) in "calibre\ebooks\metadata\__init__.py") In a metadata plugin, I create the series index from a given volume and issue number in the form "volume.issue". In most cases, the issue number runs within the volume number (usually a year), so two decimal places are sufficient. However, there are also cases where the issue number runs independently from 1 to hundreds of issues (e.g., New Worlds Science Fiction Magazine), so issue numbers above 99 may be stored in the series index but not displayed.

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05-28-2025, 11:48 AM	#2
kovidgoyal creator of calibre Posts: 45,610 Karma: 28549044 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You can create a custom column with a template at format it with as many decimal points as you like, or create a seaparate column to store volume number. calibre's builtin series field supports two digit precision as that covers the vast majority of use cases and and having more would just impose costs on everyone for a very niche use case.

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