Dynamic Metadata

CJHusVar · 07-29-2019, 05:54 PM

I've poked around in the forums and haven't been able to find exactly what I'm looking for, if it's possible at all.

I'm looking for a way to dynamically add/change metadata based on a specific field.

For example, I'd like to populate tag values and a number of custom columns based on the value in the Series field. This would be after the books are added to Calibre, during the "polishing" process.

Bookstooge · 07-29-2019, 07:13 PM

You definitely can do that. You have to create a custom column that takes values from other columns. Beyond that, I can't help you. But lots of other people should be able to give you the lowdown.

BetterRed · 07-29-2019, 07:33 PM

@CJHusVar - see ==>> The calibre template language and this sticky thread ==>> Plugboard, template, and custom composite column recipes

And the Column built from other columns ... column types

BR

CJHusVar · 07-30-2019, 12:02 PM

Bookstooge & BR, thank you for your replies.

I've uses custom columns before, I'm just not seeing how it would work in this instance. Call it a failure of imagination on my part...

I have a library for all my gaming items (roleplaying and board games). For these I have custom columns for things like 'Game System', 'Genre' and 'Setting'. What I would like to happen is that if I add an item to the 'Dungeons & Dragons' series, the other custom columns would get updated with the appropriate values automatically. Other series would have other values. It seems like I would need a lot of composite columns to accomplish this.

My wish (pipe dream?) would be to right-click on a series in the Tag Browser and have a menu item for 'Apply Metadata' and have a menu where I put in the values for the columns I want that series to have.

theducks · 07-30-2019, 03:28 PM

A calculated column uses predefined (formula by the user) code to populate.
If this Then that Else theotherchoice

What you seem to want is mind reading mode.

Where is the decision tree?

chaley · 07-30-2019, 04:29 PM

Quote:

Originally Posted by CJHusVar

I have a library for all my gaming items (roleplaying and board games). For these I have custom columns for things like 'Game System', 'Genre' and 'Setting'. What I would like to happen is that if I add an item to the 'Dungeons & Dragons' series, the other custom columns would get updated with the appropriate values automatically. Other series would have other values. It seems like I would need a lot of composite columns to accomplish this.

In your example, you would need 3 composite columns: 'Game System', 'Genre', and 'Setting'. These would each use a template to compute the value(s) for a given book using the other metadata for that book.

Quote:

My wish (pipe dream?) would be to right-click on a series in the Tag Browser and have a menu item for 'Apply Metadata' and have a menu where I put in the values for the columns I want that series to have.

This won't happen any time soon.

Assuming that the values are not arbitrary i.e. computable by a predefined template (program), you can get part way there by using bulk metadata global search and replace. You can use "template mode" to generate an set of values for a book that are then assigned to any one column in that book. In your example, you would need three saved search and replace specifications.

BetterRed · 07-30-2019, 06:26 PM

Quote:

Originally Posted by CJHusVar

Bookstooge & BR, thank you for your replies.

I've uses custom columns before, I'm just not seeing how it would work in this instance. Call it a failure of imagination on my part...

I have a library for all my gaming items (roleplaying and board games). For these I have custom columns for things like 'Game System', 'Genre' and 'Setting'. What I would like to happen is that if I add an item to the 'Dungeons & Dragons' series, the other custom columns would get updated with the appropriate values automatically. Other series would have other values. It seems like I would need a lot of composite columns to accomplish this.

My wish (pipe dream?) would be to right-click on a series in the Tag Browser and have a menu item for 'Apply Metadata' and have a menu where I put in the values for the columns I want that series to have.

Have a look at the Entities Manager plugin. It may offer an alternate approach.

BR

07-29-2019, 05:54 PM	#1
CJHusVar Member Posts: 12 Karma: 10 Join Date: Oct 2018 Device: Samsung Tab	Dynamic Metadata I've poked around in the forums and haven't been able to find exactly what I'm looking for, if it's possible at all. I'm looking for a way to dynamically add/change metadata based on a specific field. For example, I'd like to populate tag values and a number of custom columns based on the value in the Series field. This would be after the books are added to Calibre, during the "polishing" process.

07-29-2019, 07:33 PM	#3
BetterRed null operator Posts: 19,045 Karma: 22381319 Join Date: Mar 2012 Location: Sydney Australia Device: none	@CJHusVar - see ==>> The calibre template language and this sticky thread ==>> Plugboard, template, and custom composite column recipes And the Column built from other columns ... column types BR Last edited by BetterRed; 07-29-2019 at 07:35 PM.

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07-29-2019, 07:13 PM	#2
Bookstooge Fanatic Posts: 588 Karma: 1829822 Join Date: May 2019 Device: Kindle Oasis 1st Gen	You definitely can do that. You have to create a custom column that takes values from other columns. Beyond that, I can't help you. But lots of other people should be able to give you the lowdown.

07-30-2019, 12:02 PM	#4
CJHusVar Member Posts: 12 Karma: 10 Join Date: Oct 2018 Device: Samsung Tab	Bookstooge & BR, thank you for your replies. I've uses custom columns before, I'm just not seeing how it would work in this instance. Call it a failure of imagination on my part... I have a library for all my gaming items (roleplaying and board games). For these I have custom columns for things like 'Game System', 'Genre' and 'Setting'. What I would like to happen is that if I add an item to the 'Dungeons & Dragons' series, the other custom columns would get updated with the appropriate values automatically. Other series would have other values. It seems like I would need a lot of composite columns to accomplish this. My wish (pipe dream?) would be to right-click on a series in the Tag Browser and have a menu item for 'Apply Metadata' and have a menu where I put in the values for the columns I want that series to have.

07-30-2019, 03:28 PM	#5
theducks Well trained by Cats Posts: 28,431 Karma: 48895676 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2, K4NT(Fixed: New Bat.), Galaxy Tab A	A calculated column uses predefined (formula by the user) code to populate. If this Then that Else theotherchoice What you seem to want is mind reading mode. Where is the decision tree?

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