MobileRead Forums - View Single Post - Using regex for substring of comments field

rcross · 03-15-2015, 07:21 AM

I've searched around quite a bit and tried lots of things, so hopefully i'm just missing something minor.

I have some data in the comments field that I would like to display in a custom column, but I can't seem to get it working;

In the comments fields are things Like:

Code:

Lable: Some Info Here
Lable2: More info
that might be on 2 lines

[optional]general descriptive text

And being the comments field, sometimes it has html characters and sometimes not.

What I think I should be able to do is create a custom column of type "custom built from other columns" and using a template

Code:

{comments:re( 'Label: (\w*)' , '\1')}

Which should give me the output of "Some Info Here" in the column, but what I'm getting is the whole comments field. I've tried many different variations, and anytime I don't get an error, I get the same result of the whole comments field in the column.

I've been able to get {comments:substr(10,25)} to work, and I also replicate the same issue trying to apply re() on other columns like title. The closest I could find is this thread https://www.mobileread.com/forums/sho...d.php?t=245895 where the very last post has someone trying to do something similar for a version string they've stored in the comments field, but with no answer.

As a side note - is there any way to test/debug these things without requiring a restart of calibre everytime?

Thanks!

03-15-2015, 07:21 AM	#1
rcross Junior Member Posts: 2 Karma: 10 Join Date: Mar 2015 Device: kindle, ipad, desktop, multiple	Using regex for substring of comments field I've searched around quite a bit and tried lots of things, so hopefully i'm just missing something minor. I have some data in the comments field that I would like to display in a custom column, but I can't seem to get it working; In the comments fields are things Like: Code: Lable: Some Info Here Lable2: More info that might be on 2 lines [optional]general descriptive text And being the comments field, sometimes it has html characters and sometimes not. What I think I should be able to do is create a custom column of type "custom built from other columns" and using a template Code: {comments:re( 'Label: (\w*)' , '\1')} Which should give me the output of "Some Info Here" in the column, but what I'm getting is the whole comments field. I've tried many different variations, and anytime I don't get an error, I get the same result of the whole comments field in the column. I've been able to get {comments:substr(10,25)} to work, and I also replicate the same issue trying to apply re() on other columns like title. The closest I could find is this thread https://www.mobileread.com/forums/sho...d.php?t=245895 where the very last post has someone trying to do something similar for a version string they've stored in the comments field, but with no answer. As a side note - is there any way to test/debug these things without requiring a restart of calibre everytime? Thanks!