#! /usr/bin/env python
+__all__ = ['Author', 'Book', 'Extension', 'Genre', 'Language',
+ 'AuthorBook', 'BookGenre',
+ 'init_db', 'insert_name', 'update_counters',
+ ]
+
import os
-from sqlobject import SQLObject, StringCol, UnicodeCol, IntCol, \
- connectionForURI, sqlhub
+from sqlobject import SQLObject, StringCol, UnicodeCol, IntCol, BoolCol, \
+ ForeignKey, DateCol, DatabaseIndex, RelatedJoin, \
+ connectionForURI, sqlhub, SQLObjectNotFound, dberrors
from .config import ml_conf
try:
except OSError: # Perhaps already exists
pass
db_file = os.path.join(db_dir, 'm_librarian.sqlite')
- db_uri = 'sqlite://%s' % db_file.replace(os.sep, '/')
-sqlhub.processConnection = connectionForURI(db_uri)
+ db_uri = 'sqlite://%s' % db_file.replace(os.sep, '/')
+
+
+sqlhub.processConnection = connection = connectionForURI(db_uri)
+
+if connection.dbName == 'sqlite':
+ # Speedup SQLite connection
+ connection.query("PRAGMA synchronous=OFF")
+ connection.query("PRAGMA count_changes=OFF")
+ connection.query("PRAGMA journal_mode=MEMORY")
+ connection.query("PRAGMA temp_store=MEMORY")
class Author(SQLObject):
- name = UnicodeCol()
+ name = UnicodeCol(unique=True)
count = IntCol()
+ count_idx = DatabaseIndex('count')
+ books = RelatedJoin('Book', otherColumn='book_id',
+ intermediateTable='author_book',
+ createRelatedTable=False)
+
+
+class AuthorBook(SQLObject):
+ class sqlmeta:
+ table = "author_book"
+ author = ForeignKey('Author', notNull=True, cascade=True)
+ book = ForeignKey('Book', notNull=True, cascade=True)
+ main_idx = DatabaseIndex(author, book, unique=True)
class Book(SQLObject):
- name = UnicodeCol()
+ authors = RelatedJoin('Author',
+ intermediateTable='author_book',
+ createRelatedTable=False)
+ genres = RelatedJoin('Genre',
+ intermediateTable='book_genre',
+ createRelatedTable=False)
+ title = UnicodeCol()
+ series = UnicodeCol()
+ ser_no = IntCol()
+ archive = StringCol()
+ file = StringCol()
+ size = IntCol()
+ lib_id = StringCol()
+ deleted = BoolCol()
+ extension = ForeignKey('Extension')
+ date = DateCol()
+ language = ForeignKey('Language')
+ archive_file_idx = DatabaseIndex('archive', 'file', unique=True)
+
+
+class BookGenre(SQLObject):
+ class sqlmeta:
+ table = "book_genre"
+ book = ForeignKey('Book', notNull=True, cascade=True)
+ genre = ForeignKey('Genre', notNull=True, cascade=True)
+ main_idx = DatabaseIndex(book, genre, unique=True)
class Extension(SQLObject):
- name = StringCol()
+ name = StringCol(unique=True)
+ count = IntCol()
+ count_idx = DatabaseIndex('count')
+
+
+class Genre(SQLObject):
+ name = StringCol(unique=True)
+ title = UnicodeCol()
count = IntCol()
+ count_idx = DatabaseIndex('count')
+ books = RelatedJoin('Book', otherColumn='book_id',
+ intermediateTable='book_genre',
+ createRelatedTable=False)
class Language(SQLObject):
- name = StringCol()
+ name = StringCol(unique=True)
count = IntCol()
+ count_idx = DatabaseIndex('count')
-if __name__ == '__main__':
+def init_db():
+ try:
+ Book.select()[0]
+ except IndexError: # Table exists but is empty
+ return
+ except dberrors.Error:
+ for table in Author, Extension, Genre, Language, Book, \
+ AuthorBook, BookGenre:
+ table.createTable()
+ else:
+ return
+
+
+def insert_name(table, name, **kw):
+ try:
+ return table.byName(name)
+ except SQLObjectNotFound:
+ return table(name=name, count=0, **kw)
+
+
+def update_counters():
+ for author in Author.select():
+ author.count = len(author.books)
+
+ for ext in Extension.select():
+ ext.count = Book.select(Book.q.extension == ext.name).count()
+
+ for genre in Genre.select():
+ genre.count = len(genre.books)
+
+ for language in Language.select():
+ language.count = Book.select(Book.q.language == language.name).count()
+
+
+def test():
print "DB dirs:", db_dirs
if db_uri:
print "DB URI:", db_uri
+
+if __name__ == '__main__':
+ test()