Access custom fields from metadata DB

[JupiterJones]

Hello,

I try to write my first Calibre plugin and have some problems extracting especially the custom fields with the db api.

what I do is this:

  db = self.gui.current_db.new_api
        book_ids = self.gui.library_view.get_selected_ids()
        
        for bid in book_ids:
            
            lh =  db.get_metadata(bid)

Then I access the data with lh.pubdate, lh.title etc.

But how can I access the custom field to store them in variables ?

[kovidgoyal]

db.field_for('#mycolumn', book_id)

or

lh.get('#mycolumn')

[JupiterJones]

Works thank you