mirror of
https://github.com/veekun/pokedex.git
synced 2024-08-20 18:16:34 +00:00
ffc30bff8f
Note: `if not x:` has changed to `if x is not None:`, changing the semantics slightly. Shouldn't be a big issue.
43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
from sqlalchemy import MetaData, Table, create_engine, orm
|
|
|
|
from ..defaults import get_default_db_uri
|
|
from .tables import metadata
|
|
|
|
|
|
def connect(uri=None, session_args={}, engine_args={}):
|
|
"""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.
|
|
"""
|
|
|
|
# If we didn't get a uri, fall back to the default
|
|
if uri is None:
|
|
uri = get_default_db_uri()
|
|
|
|
### 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, **engine_args)
|
|
conn = engine.connect()
|
|
metadata.bind = engine
|
|
|
|
all_session_args = dict(autoflush=True, autocommit=False, bind=engine)
|
|
all_session_args.update(session_args)
|
|
sm = orm.sessionmaker(**all_session_args)
|
|
session = orm.scoped_session(sm)
|
|
|
|
return session
|