# encoding: utf8
import sys
+from sqlalchemy.exc import IntegrityError
import sqlalchemy.types
-from .db import connect, metadata
+from .db import connect, metadata, tables as tables_module
+from pokedex.lookup import lookup as pokedex_lookup
def main():
if len(sys.argv) <= 1:
args = sys.argv[2:]
# Find the command as a function in this file
- func = globals().get(command, None)
- if func and callable(func) and command != 'main':
+ func = globals().get("command_%s" % command, None)
+ if func:
func(*args)
else:
- help()
+ command_help()
-def csvimport(engine_uri, dir='.'):
+def command_csvimport(engine_uri, directory='.'):
import csv
from sqlalchemy.orm.attributes import instrumentation_registry
- session = connect(engine_uri)
+ # Use autocommit in case rows fail due to foreign key incest
+ session = connect(engine_uri, autocommit=True, autoflush=False)
metadata.create_all()
- # Oh, mysql-chan.
- # TODO try to insert data in preorder so we don't need this hack and won't
- # break similarly on other engines
- if 'mysql' in engine_uri:
- session.execute('SET FOREIGN_KEY_CHECKS = 0')
-
- # This is a secret attribute on a secret singleton of a secret class that
- # appears to hopefully contain all registered classes as keys.
- # There is no other way to accomplish this, as far as I can tell.
- # Fuck.
- for table in sorted(instrumentation_registry.manager_finders.keys(),
- key=lambda self: self.__table__.name):
- table_name = table.__table__.name
+ # SQLAlchemy is retarded and there is no way for me to get a list of ORM
+ # classes besides to inspect the module they all happen to live in for
+ # things that look right.
+ table_base = tables_module.TableBase
+ orm_classes = {} # table object => table class
+
+ for name in dir(tables_module):
+ # dir() returns strings! How /convenient/.
+ thingy = getattr(tables_module, name)
+
+ if not isinstance(thingy, type):
+ # Not a class; bail
+ continue
+ elif not issubclass(thingy, table_base):
+ # Not a declarative table; bail
+ continue
+ elif thingy == table_base:
+ # Declarative table base, so not a real table; bail
+ continue
+
+ # thingy is definitely a table class! Hallelujah.
+ orm_classes[thingy.__table__] = thingy
+
+ # Okay, run through the tables and actually load the data now
+ for table_obj in metadata.sorted_tables:
+ table_class = orm_classes[table_obj]
+ table_name = table_obj.name
+
# Print the table name but leave the cursor in a fixed column
print table_name + '...', ' ' * (40 - len(table_name)),
+ sys.stdout.flush()
try:
- csvfile = open("%s/%s.csv" % (dir, table_name), 'rb')
+ csvfile = open("%s/%s.csv" % (directory, table_name), 'rb')
except IOError:
# File doesn't exist; don't load anything!
print 'no data!'
reader = csv.reader(csvfile, lineterminator='\n')
column_names = [unicode(column) for column in reader.next()]
+ # Self-referential tables may contain rows with foreign keys of
+ # other rows in the same table that do not yet exist. We'll keep
+ # a running list of these and try inserting them again after the
+ # rest are done
+ failed_rows = []
+
for csvs in reader:
- row = table()
+ row = table_class()
for column_name, value in zip(column_names, csvs):
- column = table.__table__.c[column_name]
+ column = table_obj.c[column_name]
if column.nullable and value == '':
# Empty string in a nullable column really means NULL
value = None
setattr(row, column_name, value)
- session.add(row)
-
- session.commit()
- print 'loaded'
-
- # Shouldn't matter since this is usually the end of the program and thus
- # the connection too, but let's change this back just in case
- if 'mysql' in engine_uri:
- session.execute('SET FOREIGN_KEY_CHECKS = 1')
-
-
-def csvexport(engine_uri, dir='.'):
+ try:
+ session.add(row)
+ session.flush()
+ except IntegrityError, e:
+ failed_rows.append(row)
+
+ # Loop over the failed rows and keep trying to insert them. If a loop
+ # doesn't manage to insert any rows, bail.
+ do_another_loop = True
+ while failed_rows and do_another_loop:
+ do_another_loop = False
+
+ for i, row in enumerate(failed_rows):
+ try:
+ session.add(row)
+ session.flush()
+
+ # Success!
+ del failed_rows[i]
+ do_another_loop = True
+ except IntegrityError, e:
+ pass
+
+ if failed_rows:
+ print len(failed_rows), "rows failed"
+ else:
+ print 'loaded'
+
+def command_csvexport(engine_uri, directory='.'):
import csv
session = connect(engine_uri)
print table_name
table = metadata.tables[table_name]
- writer = csv.writer(open("%s/%s.csv" % (dir, table_name), 'wb'), lineterminator='\n')
+ writer = csv.writer(open("%s/%s.csv" % (directory, table_name), 'wb'),
+ lineterminator='\n')
columns = [col.name for col in table.columns]
writer.writerow(columns)
- for row in session.query(table).all():
+ primary_key = table.primary_key
+ for row in session.query(table).order_by(*primary_key).all():
csvs = []
for col in columns:
# Convert Pythony values to something more universal
writer.writerow(csvs)
+def command_lookup(engine_uri, name):
+ # XXX don't require uri! somehow
+ session = connect(engine_uri)
+
+ results, exact = pokedex_lookup(session, name)
+ if exact:
+ print "Matched:"
+ else:
+ print "Fuzzy-matched:"
+
+ for object in results:
+ print object.__tablename__, object.name
+
-def help():
+def command_help():
print u"""pokedex -- a command-line Pokédex interface
help Displays this message.
+ lookup {uri} [name] Look up something in the Pokédex.
These commands are only useful for developers:
csvimport {uri} [dir] Import data from a set of CSVs to the database
csvexport {uri} [dir] Export data from the database given by the URI
to a set of CSVs.
Directory defaults to cwd.
-"""
+""".encode(sys.getdefaultencoding(), 'replace')
sys.exit(0)
projects / zzz-pokedex.git / blobdiff