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Method that allows implementing has_book in a worker process with no access to the data

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Kovid Goyal 2014-11-09 21:11:39 +05:30
parent e50915bfe8
commit b127f0b3f9
1 changed files with 8 additions and 1 deletions
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9
src/calibre/db/cache.py
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@ -1422,11 +1422,18 @@ class Cache(object):
result.append(author_to_author_sort(aut) if aid is None else table.asort_map[aid]) result.append(author_to_author_sort(aut) if aid is None else table.asort_map[aid])
return ' & '.join(filter(None, result)) return ' & '.join(filter(None, result))
@read_api
def data_for_has_book(self):
''' Return data suitable for use in :meth:`has_book`. This can be used for an
implementation of :meth:`has_book` in a worker process without access to the
db. '''
return {icu_lower(title):book_id for book_id, title in self.fields['title'].table.book_col_map.itervalues()}
@read_api @read_api
def has_book(self, mi): def has_book(self, mi):
''' Return True iff the database contains an entry with the same title ''' Return True iff the database contains an entry with the same title
as the passed in Metadata object. The comparison is case-insensitive. as the passed in Metadata object. The comparison is case-insensitive.
''' See also :meth:`data_for_has_book`. '''
title = mi.title title = mi.title
if title: if title:
if isbytestring(title): if isbytestring(title):