Problem with template functions and library maintenance

Terisa de morgan · 03-08-2017, 02:03 PM

Hi,

As I'm much more fluent in python language than template definition, I have a lot of template functions that I call directly in custom columns. I've seen today that, after a library maintenance, the custom columns get broken because the template functions disappear (they are not there when you go into Preferences->Template functions). If you change the library and go back again, the functions are already there.

Is this normal?

Thank you

chaley · 03-08-2017, 03:32 PM

That means that I forgot to load the template functions after the database is closed, vacuumed, then reopened. I will look into fixing it.

Fortunately you have an easy workaround.

Terisa de morgan · 03-08-2017, 03:34 PM

Thank you, and yes, easy workaround after the first moment of panic goes away

chaley · 03-11-2017, 03:48 PM

Kovid accepted the fix, which is now in source. Let me know if it doesn't fix your problem.

Terisa de morgan · 03-11-2017, 03:58 PM

I'll tell you in the next release, yes (I don't usually run from source). Thank you very much for the fix.

BetterRed · 03-11-2017, 04:17 PM

Quote:

Originally Posted by chaley

Kovid accepted the fix, which is now in source. Let me know if it doesn't fix your problem.

@chaley - might that also fix the issue that comes up in this this thread ==>> Column to show mags. that are NOT in any virtual Libraries

Seems vaguely similar, the workaround is do library switches or a restart.

BR

chaley · 03-11-2017, 04:42 PM

Quote:

Originally Posted by BetterRed

@chaley - should that also fix the issue that comes up in this this thread ==>> Column to show mags. that are NOT in any virtual Libraries

Seems vaguely similar, the workaround is do library switches or a restart.

BR

I don't see why this change would fix anything related to this problem. The fix specifically reloads custom template functions after a check library.

NB: I tried creating a new custom column, "column built from other columns, behaves like tags" with the template {:'virtual_libraries()'}. It is a totally new column using a never-before-used lookup name. I had to restart to see the column at all, and after that it worked fine with no "recursion" error message. I also tried changing the template for an existing custom column and had no problems. I don't know why others are seeing the error. I suspect that people are reusing lookup names, something that is known to be problematic, but that is at best a suspicion.

BetterRed · 03-11-2017, 05:47 PM

@chaley - as I wrote 'seems vaguely similar'. Had it been the same I would have retracted my suggestion to Alaa that he report his problem as bug, and given him a link to this thread.

my '#location/Location' column is a pre-existing a long text column, not that it's type should make any difference.

I just restored my Test library to Thursday evening my time. I created the 'Has Location' virtual library and the '#virtlib/Virtual Libraries' column and did a restart. Then I added the Virtual Libraries column to the Book List, via right click headers and Show Columns. The first item had the correct value in Virtual Libraries, but the rest (including those with nothing in Location) had a TEMPLATE ERROR ... message. Did a restart and everything was OK.

But as I mentioned, my tests are on my kitchen sink test library. I will redo on a fresh library when I'm less busy. I have a new screen recorder toy - I could try it out at the same time

BR

BetterRed · 03-11-2017, 05:58 PM

Quote:

Originally Posted by chaley

NB: I tried creating a new custom column, "column built from other columns, behaves like tags" with the template {:'virtual_libraries()'}.

- my equivalent column is "column built from other columns", i.e. not like tags, would that make a difference? Wouldn't have thought so.

BR

chaley · 03-11-2017, 05:59 PM

@BR: my apologies for sounding testy. Life is a bit complicated here ...

Clearly there is something wrong given that several people have seen the problem. My problem is that I can't repeat it so I have no idea where to look. I have tried creating a new column, hiding and restoring a column, and sitting for 5 minutes chanting "ooomm", all without a failure. Eating a bowl of ice cream didn't work either.

If your tests come up with something repeatable then I will be happy to look at it and (I hope) fix it. Or even if things aren't repeatable but provide enough pointers for where to look.

chaley · 03-11-2017, 05:59 PM

Quote:

Originally Posted by BetterRed

- my equivalent column is "column built from other columns", i.e. not like tags, would that make a difference? Wouldn't have thought so.

BR

It might. The two types go through different code paths. I will look at it.

BetterRed · 03-11-2017, 06:06 PM

Quote:

Originally Posted by chaley

@BR: my apologies for sounding testy. Life is a bit complicated here ...

No worries - there's a simple one keystroke workaround - Ctrl+R. Go for a walk/bike ride in the park, you have plenty to choose from.

I'll be back by COB tomorrow.

BR

BetterRed · 03-11-2017, 09:43 PM

@chaley - see post #8 in ==>> Column to show mags. that are NOT in any virtual Libraries

Good and not so good news awaits thee.

BR

03-08-2017, 02:03 PM	#1
Terisa de morgan Grand Sorcerer Posts: 6,312 Karma: 12117033 Join Date: Jun 2009 Location: Madrid, Spain Device: Kobo Clara/Aura One/Forma,XiaoMI 5, iPad, Huawei MediaPad, YotaPhone 2	Problem with template functions and library maintenance Hi, As I'm much more fluent in python language than template definition, I have a lot of template functions that I call directly in custom columns. I've seen today that, after a library maintenance, the custom columns get broken because the template functions disappear (they are not there when you go into Preferences->Template functions). If you change the library and go back again, the functions are already there. Is this normal? Thank you

03-08-2017, 03:34 PM	#3
Terisa de morgan Grand Sorcerer Posts: 6,312 Karma: 12117033 Join Date: Jun 2009 Location: Madrid, Spain Device: Kobo Clara/Aura One/Forma,XiaoMI 5, iPad, Huawei MediaPad, YotaPhone 2	Thank you, and yes, easy workaround after the first moment of panic goes away Last edited by Terisa de morgan; 03-08-2017 at 03:51 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Missing Library/Library Maintenance button	babyshelley	Library Management	2	06-20-2015 01:05 PM
Library maintenance -> Check library	mlevin77	Library Management	9	07-22-2014 08:03 PM
template: if one of the tag is something... maybe contains or in_list functions	fxp33	Calibre	4	07-19-2014 05:18 AM
Making references to other fields in template functions	Ruskie_it	Library Management	10	12-21-2011 10:53 PM
Does anyone use "general program mode" template functions?	chaley	Library Management	0	08-16-2011 11:54 AM

03-08-2017, 03:32 PM	#2
chaley Grand Sorcerer Posts: 11,867 Karma: 7036359 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	That means that I forgot to load the template functions after the database is closed, vacuumed, then reopened. I will look into fixing it. Fortunately you have an easy workaround.

03-11-2017, 03:48 PM	#4
chaley Grand Sorcerer Posts: 11,867 Karma: 7036359 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	Kovid accepted the fix, which is now in source. Let me know if it doesn't fix your problem.

03-11-2017, 03:58 PM	#5
Terisa de morgan Grand Sorcerer Posts: 6,312 Karma: 12117033 Join Date: Jun 2009 Location: Madrid, Spain Device: Kobo Clara/Aura One/Forma,XiaoMI 5, iPad, Huawei MediaPad, YotaPhone 2	I'll tell you in the next release, yes (I don't usually run from source). Thank you very much for the fix.

03-11-2017, 05:47 PM	#8
BetterRed null operator (he/him) Posts: 20,794 Karma: 27405122 Join Date: Mar 2012 Location: Sydney Australia Device: none	@chaley - as I wrote 'seems vaguely similar'. Had it been the same I would have retracted my suggestion to Alaa that he report his problem as bug, and given him a link to this thread. my '#location/Location' column is a pre-existing a long text column, not that it's type should make any difference. I just restored my Test library to Thursday evening my time. I created the 'Has Location' virtual library and the '#virtlib/Virtual Libraries' column and did a restart. Then I added the Virtual Libraries column to the Book List, via right click headers and Show Columns. The first item had the correct value in Virtual Libraries, but the rest (including those with nothing in Location) had a TEMPLATE ERROR ... message. Did a restart and everything was OK. But as I mentioned, my tests are on my kitchen sink test library. I will redo on a fresh library when I'm less busy. I have a new screen recorder toy - I could try it out at the same time BR Last edited by BetterRed; 03-11-2017 at 05:56 PM.

03-11-2017, 05:59 PM	#10
chaley Grand Sorcerer Posts: 11,867 Karma: 7036359 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	@BR: my apologies for sounding testy. Life is a bit complicated here ... Clearly there is something wrong given that several people have seen the problem. My problem is that I can't repeat it so I have no idea where to look. I have tried creating a new column, hiding and restoring a column, and sitting for 5 minutes chanting "ooomm", all without a failure. Eating a bowl of ice cream didn't work either. If your tests come up with something repeatable then I will be happy to look at it and (I hope) fix it. Or even if things aren't repeatable but provide enough pointers for where to look.

03-11-2017, 09:43 PM	#13
BetterRed null operator (he/him) Posts: 20,794 Karma: 27405122 Join Date: Mar 2012 Location: Sydney Australia Device: none	@chaley - see post #8 in ==>> Column to show mags. that are NOT in any virtual Libraries Good and not so good news awaits thee. BR

Advert

Advert