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Old 02-20-2024, 01:31 AM   #1
tgiladi
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Template language - Conditionally including text

Hi,
I followed the instructions here: https://manual.calibre-ebook.com/template_lang.html and successfully managed to set the save to disk setting to my preferences:
Code:
{series} {series_index:0>2s|#| - }{title} - {authors}
This works very well when saving to disk, so I thought I could use the same technique when customizing my jacket.xhtml template. What I am trying to achieve is having the book's name in it's original language, below the Ttitle. For this I am using a custom column, and I am able to show it without issue if there is data in that column. But what I can't figure out how to do is to have that name in parenthesis like so: (original name). If I add parenthesis to the code, then they would show anyway, even if there is no data in the custom column. I tried this code:
Code:
{_original_name:|(|)}
but it is not working and I get an error when I try to polish the book with this code: ValueError: Invalid format specifier '|(|)' for object of type 'str'

Is there another way to include the parenthesis around the conditional text only if there is data in the custom column?
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Old 02-20-2024, 09:26 AM   #2
chaley
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Quote:
Originally Posted by tgiladi View Post
Hi,
I followed the instructions here: https://manual.calibre-ebook.com/template_lang.html and successfully managed to set the save to disk setting to my preferences:
Code:
{series} {series_index:0>2s|#| - }{title} - {authors}
This works very well when saving to disk, so I thought I could use the same technique when customizing my jacket.xhtml template. What I am trying to achieve is having the book's name in it's original language, below the Ttitle. For this I am using a custom column, and I am able to show it without issue if there is data in that column. But what I can't figure out how to do is to have that name in parenthesis like so: (original name). If I add parenthesis to the code, then they would show anyway, even if there is no data in the custom column. I tried this code:
Code:
{_original_name:|(|)}
but it is not working and I get an error when I try to polish the book with this code: ValueError: Invalid format specifier '|(|)' for object of type 'str'

Is there another way to include the parenthesis around the conditional text only if there is data in the custom column?
I suspect the parser in the jacket processor is not handling the conditional formatting specification correctly. As a workaround, put the parenthesis into your custom column. Or create a new "column built from other columns" that formats the text however you want.
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Old 02-20-2024, 12:56 PM   #3
tgiladi
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tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.tgiladi can even cheer up an android equipped with a defective Genuine Personality Prototype.
 
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Thank you for your suggestions! I opted for the custom column built from another column and formatted it to include the parenthesis. This is what I am including in my jacket now and it works exactly as I wanted it.
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