Update opdsdb.clear_all for quick delete database data

from django.db.models import Q

from django.utils.translation import ugettext as _

from django.db import transaction

from django.db import transaction, connection

from opds_catalog.models import Book, Catalog, Author, Genre, Series, bseries, bauthor, bgenre, bookshelf, Counter, LangCodes

from opds_catalog.models import SIZE_BOOK_FILENAME, SIZE_BOOK_PATH, SIZE_BOOK_FORMAT, SIZE_BOOK_DOCDATE, SIZE_BOOK_LANG, SIZE_BOOK_TITLE, SIZE_BOOK_ANNOTATION

utfhigh = re.compile(u'[\U00010000-\U0010ffff]')

def clear_all(verbose=False):

    count = bseries.objects.all().delete()

    if verbose: print("From bseries table %s row deleted"%count[0])

    count = bauthor.objects.all().delete()

    if verbose: print("From bauthor table %s row deleted"%count[0])

    count = bgenre.objects.all().delete()    

    if verbose: print("From bgenre table %s row deleted"%count[0])

    count = Book.objects.all().delete()

    if verbose: print("From Book  table %s row deleted"%count[0])

    count = Catalog.objects.all().delete()

    if verbose: print("From Catalog table %s row deleted"%count[0])

    count = Author.objects.all().delete()

    if verbose: print("From Author table %s row deleted"%count[0])

    count = Genre.objects.all().delete()

    if verbose: print("From Genre table %s row deleted"%count[0])

    count = Series.objects.all().delete()

    if verbose: print("From Series table %s row deleted"%count[0])

    count = bookshelf.objects.all().delete()

    if verbose: print("From bookshelf table %s row deleted"%count[0])

    count = Counter.objects.all().delete()

    if verbose: print("From Counter table %s row deleted"%count[0])

    cursor = connection.cursor()

    cursor.execute('delete from opds_catalog_bseries')

    cursor.execute('delete from opds_catalog_bauthor')

    cursor.execute('delete from opds_catalog_bgenre')

    cursor.execute('delete from opds_catalog_book')

    cursor.execute('delete from opds_catalog_catalog')

    cursor.execute('delete from opds_catalog_author')

    cursor.execute('delete from opds_catalog_genre')

    cursor.execute('delete from opds_catalog_series')

    cursor.execute('delete from opds_catalog_bookshelf')

    cursor.execute('delete from opds_catalog_counter')

# Книги где avail=0 уже известно что удалены

# Книги где avail=2 это только что прверенные существующие книги