webengine-dialog and database connection

pl000070 · 11-20-2019, 02:40 AM

Hello All,

Please help on how to connect to current database from another Calibre instance with webengine-dialog.

I just registered to ask this question. I've got a private plugin that allows to find book metadata by manual search in the Internet (I noticed that sometimes standard import metadata plugins are completely lost e.g. when book title is short and non-unique). Recently I upgraded to Calibre 4 and discovered QWebEngineView. I implemented webengine-dialog but I have problem how to connect to current database without active GUI. I need to store metadata read from Web page. I don't know how to use RC signal as it seems that list of possible functions is hardcoded, so I think I need to write directly to database.

Thanks in advance for any help.

pl000070 · 11-20-2019, 02:49 AM

Just to add to my question: I tried to use

Code:

from calibre.library import db

but I cannot use db afterwards.

kovidgoyal · 11-20-2019, 10:13 PM

You cannot connect to a database from webengine-dialog. Instead have your webengine-dialog process store the metadata in a temp file/folder and read it from there in the main process after the dialog is closed.

pl000070 · 11-21-2019, 05:41 PM

Thank you very much for the advice and quick answer. I'll do this way. Topic closed.

11-20-2019, 02:40 AM	#1
pl000070 Junior Member Posts: 3 Karma: 10 Join Date: Nov 2019 Device: PocketBook InkPad3	webengine-dialog and database connection Hello All, Please help on how to connect to current database from another Calibre instance with webengine-dialog. I just registered to ask this question. I've got a private plugin that allows to find book metadata by manual search in the Internet (I noticed that sometimes standard import metadata plugins are completely lost e.g. when book title is short and non-unique). Recently I upgraded to Calibre 4 and discovered QWebEngineView. I implemented webengine-dialog but I have problem how to connect to current database without active GUI. I need to store metadata read from Web page. I don't know how to use RC signal as it seems that list of possible functions is hardcoded, so I think I need to write directly to database. Thanks in advance for any help.

11-20-2019, 02:49 AM	#2
pl000070 Junior Member Posts: 3 Karma: 10 Join Date: Nov 2019 Device: PocketBook InkPad3	webengine-dialog and database connection Just to add to my question: I tried to use Code: from calibre.library import db but I cannot use db afterwards.

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11-20-2019, 10:13 PM	#3
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You cannot connect to a database from webengine-dialog. Instead have your webengine-dialog process store the metadata in a temp file/folder and read it from there in the main process after the dialog is closed.

11-21-2019, 05:41 PM	#4
pl000070 Junior Member Posts: 3 Karma: 10 Join Date: Nov 2019 Device: PocketBook InkPad3	Thank you very much for the advice and quick answer. I'll do this way. Topic closed.

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