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from .main import MyCli
import sql.parse
import sql.connection
import logging
_logger = logging.getLogger(__name__)
def load_ipython_extension(ipython):
# This is called via the ipython command '%load_ext mycli.magic'.
# First, load the sql magic if it isn't already loaded.
if not ipython.find_line_magic('sql'):
ipython.run_line_magic('load_ext', 'sql')
# Register our own magic.
ipython.register_magic_function(mycli_line_magic, 'line', 'mycli')
def mycli_line_magic(line):
_logger.debug('mycli magic called: %r', line)
parsed = sql.parse.parse(line, {})
# "get" was renamed to "set" in ipython-sql:
# https://github.com/catherinedevlin/ipython-sql/commit/f4283c65aaf68f961e84019e8b939e4a3c501d43
if hasattr(sql.connection.Connection, "get"):
conn = sql.connection.Connection.get(parsed["connection"])
else:
try:
conn = sql.connection.Connection.set(parsed["connection"])
# a new positional argument was added to Connection.set in version 0.4.0 of ipython-sql
except TypeError:
conn = sql.connection.Connection.set(parsed["connection"], False)
try:
# A corresponding mycli object already exists
mycli = conn._mycli
_logger.debug('Reusing existing mycli')
except AttributeError:
mycli = MyCli()
u = conn.session.engine.url
_logger.debug('New mycli: %r', str(u))
mycli.connect(host=u.host, port=u.port, passwd=u.password, database=u.database, user=u.username, init_command=None)
conn._mycli = mycli
# For convenience, print the connection alias
print('Connected: {}'.format(conn.name))
try:
mycli.run_cli()
except SystemExit:
pass
if not mycli.query_history:
return
q = mycli.query_history[-1]
if q.mutating:
_logger.debug('Mutating query detected -- ignoring')
return
if q.successful:
ipython = get_ipython()
return ipython.run_cell_magic('sql', line, q.query)
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