veekun_pokedex/pokedex/db/__init__.py
Eevee 1a7d046fbc Vastly improved the pokedex import/export UI.
csvimport is now load; csvexport is now dump.

Both take an optional -e switch to specify an engine, but will happily
use a default SQLite database in the pokedex package directory.

Additionally, the CSV directory is now controlled by the optional -d
switch, and defaults to Doing The Right Thing.

So `pokedex load` now does exactly what you'd expect: loads the data
from the right files into a consistently-located database.
2009-08-18 18:02:53 -07:00

45 lines
1.5 KiB
Python

import pkg_resources
from sqlalchemy import MetaData, Table, create_engine, orm
from .tables import metadata
def connect(uri=None, **kwargs):
"""Connects to the requested URI. Returns a session object.
With the URI omitted, attempts to connect to a default SQLite database
contained within the package directory.
Calling this function also binds the metadata object to the created engine.
"""
# Default to a URI within the package, which was hopefully created at some point
if not uri:
sqlite_path = pkg_resources.resource_filename('pokedex',
'data/pokedex.sqlite')
uri = 'sqlite:///' + sqlite_path
### Do some fixery for MySQL
if uri[0:5] == 'mysql':
# MySQL uses latin1 for connections by default even if the server is
# otherwise oozing with utf8; charset fixes this
if 'charset' not in uri:
uri += '?charset=utf8'
# Tables should be InnoDB, in the event that we're creating them, and
# use UTF-8 goddammit!
for table in metadata.tables.values():
table.kwargs['mysql_engine'] = 'InnoDB'
table.kwargs['mysql_charset'] = 'utf8'
### Connect
engine = create_engine(uri)
conn = engine.connect()
metadata.bind = engine
session_args = dict(autoflush=True, autocommit=False, bind=engine)
session_args.update(kwargs)
sm = orm.sessionmaker(**session_args)
session = orm.scoped_session(sm)
return session