61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
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import argparse
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import os
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import sqlite3
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import sys
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import phototagger
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def upgrade_1_to_2(sql):
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'''
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In this version, a column `tagged_at` was added to the Photos table, to keep
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track of the last time the photo's tags were edited (added or removed).
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'''
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cur = sql.cursor()
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cur.execute('ALTER TABLE photos ADD COLUMN tagged_at INT')
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def upgrade_all(database_filename):
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'''
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Given the filename of a phototagger database, apply all of the needed
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upgrade_x_to_y functions in order.
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'''
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if not os.path.isfile(database_filename):
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raise FileNotFoundError(database_filename)
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sql = sqlite3.connect(database_filename)
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cur = sql.cursor()
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cur.execute('PRAGMA user_version')
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current_version = cur.fetchone()[0]
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needed_version = phototagger.DATABASE_VERSION
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if current_version == needed_version:
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print('Already up-to-date.')
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return
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for version_number in range(current_version + 1, needed_version + 1):
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print('Upgrading from %d to %d' % (current_version, version_number))
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upgrade_function = 'upgrade_%d_to_%d' % (current_version, version_number)
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upgrade_function = eval(upgrade_function)
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upgrade_function(sql)
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sql.cursor().execute('PRAGMA user_version = 2')
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sql.commit()
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current_version = version_number
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print('Upgrades finished.')
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def upgrade_all_argparse(args):
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return upgrade_all(database_filename=args.database_filename)
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def main(argv):
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parser = argparse.ArgumentParser()
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parser.add_argument('database_filename')
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parser.set_defaults(func=upgrade_all_argparse)
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args = parser.parse_args(argv)
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args.func(args)
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if __name__ == '__main__':
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main(sys.argv[1:])
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