MobileRead Forums - View Single Post - Forcing Total Cache & GUI Refresh Without Restarting

DaltonST · 09-18-2014, 04:29 PM

I have answered my own question posed in the original post, and have documented it here. Be careful.

from calibre.db.cache import Cache as dbcache
#------------------------------------------

def force_refresh_of_cache(self, books_to_refresh):

# Use with *great discretion* to avoid bad things happening.

# Do this only when an annoying restart would otherwise be indicated and required
# due to the update of custom column metadata done *outside* of the Calibre API, i.e.,
# db = self.gui.current_db.new_api #see: http://manual.calibre-ebook.com/db_api.html

# NO jobs or other background tasks should be running when you execute this.

# 'books_to_refresh' is a simple list of integers (i.e., books), and is not a list of dicts (e.g., {'calibre_id': 12345} )
# To get a set of all books in the library (required as a parameter to this function):
# db = self.gui.current_db.new_api #see: http://manual.calibre-ebook.com/db_api.html
# books_to_refresh_frozenset = db.all_book_ids()
# Then, you must create books_to_refresh as a simple list from the frozenset and pass it as the only parameter to here.
# After this executes, the next time the user clicks on the gui, it will show the refreshed metadata.

backend = self.gui.library_view.model().db.backend
mydbcache = dbcache(self.gui.library_view.model().db.backend)
mydbcache.init() #refreshes the cache from the physical metadata.db. refer to: >src>calibre>db>cache.py
self.gui.library_view.model().refresh_ids(list(boo ks_to_refresh)) #refreshes the gui from the cache
# class EditMetadataAction in src>calibre>gui2>actions>edit_metadata.py
self.gui.tags_view.recount() #refreshes the tag browser
# class TagsView in src>calibre>gui2>tag_browser>view.py

#-------------------

Best of luck.

09-18-2014, 04:29 PM	#14
DaltonST Deviser Posts: 2,265 Karma: 2090983 Join Date: Aug 2013 Location: Texas Device: none	def force_refresh_of_cache(self, books_to_refresh): I have answered my own question posed in the original post, and have documented it here. Be careful. from calibre.db.cache import Cache as dbcache #------------------------------------------ def force_refresh_of_cache(self, books_to_refresh): # Use with great discretion to avoid bad things happening. # Do this only when an annoying restart would otherwise be indicated and required # due to the update of custom column metadata done outside of the Calibre API, i.e., # db = self.gui.current_db.new_api #see: http://manual.calibre-ebook.com/db_api.html # NO jobs or other background tasks should be running when you execute this. # 'books_to_refresh' is a simple list of integers (i.e., books), and is not a list of dicts (e.g., {'calibre_id': 12345} ) # To get a set of all books in the library (required as a parameter to this function): # db = self.gui.current_db.new_api #see: http://manual.calibre-ebook.com/db_api.html # books_to_refresh_frozenset = db.all_book_ids() # Then, you must create books_to_refresh as a simple list from the frozenset and pass it as the only parameter to here. # After this executes, the next time the user clicks on the gui, it will show the refreshed metadata. backend = self.gui.library_view.model().db.backend mydbcache = dbcache(self.gui.library_view.model().db.backend) mydbcache.init() #refreshes the cache from the physical metadata.db. refer to: >src>calibre>db>cache.py self.gui.library_view.model().refresh_ids(list(boo ks_to_refresh)) #refreshes the gui from the cache # class EditMetadataAction in src>calibre>gui2>actions>edit_metadata.py self.gui.tags_view.recount() #refreshes the tag browser # class TagsView in src>calibre>gui2>tag_browser>view.py #------------------- Best of luck.