# encoding: utf8
+from optparse import OptionParser
import sys
-from sqlalchemy.exc import IntegrityError
-import sqlalchemy.types
-
-from .db import connect, metadata, tables as tables_module
+from .db import connect, metadata
+import pokedex.db.load
from pokedex.lookup import lookup as pokedex_lookup
def main():
if len(sys.argv) <= 1:
- help()
+ command_help()
command = sys.argv[1]
args = sys.argv[2:]
command_help()
-def command_csvimport(engine_uri, directory='.'):
- import csv
+def command_dump(*args):
+ parser = OptionParser()
+ parser.add_option('-e', '--engine', dest='engine_uri', default=None)
+ parser.add_option('-d', '--directory', dest='directory', default=None)
+ options, _ = parser.parse_args(list(args))
- from sqlalchemy.orm.attributes import instrumentation_registry
+ session = connect(options.engine_uri)
+ pokedex.db.load.dump(session, directory=options.directory)
- session = connect(engine_uri)
+def command_load(*args):
+ parser = OptionParser()
+ parser.add_option('-e', '--engine', dest='engine_uri', default=None)
+ parser.add_option('-d', '--directory', dest='directory', default=None)
+ parser.add_option('-D', '--drop-tables', dest='drop_tables', default=False, action='store_true')
+ options, _ = parser.parse_args(list(args))
- metadata.create_all()
-
- # 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" % (directory, table_name), 'rb')
- except IOError:
- # File doesn't exist; don't load anything!
- print 'no data!'
- continue
-
- 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. Pull these out and add
- # them to the session last
- # ASSUMPTION: Self-referential tables have a single PK called "id"
- deferred_rows = [] # ( row referring to id, [foreign ids we need] )
- seen_ids = {} # primary key we've seen => 1
-
- # Fetch foreign key columns that point at this table, if any
- self_ref_columns = []
- for column in table_obj.c:
- if any(_.references(table_obj) for _ in column.foreign_keys):
- self_ref_columns.append(column)
-
- for csvs in reader:
- row = table_class()
-
- for column_name, value in zip(column_names, csvs):
- column = table_obj.c[column_name]
- if column.nullable and value == '':
- # Empty string in a nullable column really means NULL
- value = None
- elif isinstance(column.type, sqlalchemy.types.Boolean):
- # Boolean values are stored as string values 0/1, but both
- # of those evaluate as true; SQLA wants True/False
- if value == '0':
- value = False
- else:
- value = True
- else:
- # Otherwise, unflatten from bytes
- value = value.decode('utf-8')
-
- setattr(row, column_name, value)
-
- # May need to stash this row and add it later if it refers to a
- # later row in this table
- if self_ref_columns:
- foreign_ids = [getattr(row, _.name) for _ in self_ref_columns]
- foreign_ids = [_ for _ in foreign_ids if _] # remove NULL ids
-
- if not foreign_ids:
- # NULL key. Remember this row and add as usual.
- seen_ids[row.id] = 1
-
- elif all(_ in seen_ids for _ in foreign_ids):
- # Non-NULL key we've already seen. Remember it and commit
- # so we know the old row exists when we add the new one
- session.commit()
- seen_ids[row.id] = 1
-
- else:
- # Non-NULL future id. Save this and insert it later!
- deferred_rows.append((row, foreign_ids))
- continue
-
- session.add(row)
-
- session.commit()
-
- # Attempt to add any spare rows we've collected
- for row, foreign_ids in deferred_rows:
- if not all(_ in seen_ids for _ in foreign_ids):
- # Could happen if row A refers to B which refers to C.
- # This is ridiculous and doesn't happen in my data so far
- raise ValueError("Too many levels of self-reference! "
- "Row was: " + str(row.__dict__))
-
- session.add(row)
- seen_ids[row.id] = 1
- session.commit()
-
- print 'loaded'
-
-def command_csvexport(engine_uri, directory='.'):
- import csv
- session = connect(engine_uri)
+ session = connect(options.engine_uri)
+
+ pokedex.db.load.load(session, directory=options.directory,
+ drop_tables=options.drop_tables)
- for table_name in sorted(metadata.tables.keys()):
- print table_name
- table = metadata.tables[table_name]
-
- writer = csv.writer(open("%s/%s.csv" % (directory, table_name), 'wb'),
- lineterminator='\n')
- columns = [col.name for col in table.columns]
- writer.writerow(columns)
-
- 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
- val = getattr(row, col)
- if val == None:
- val = ''
- elif val == True:
- val = '1'
- elif val == False:
- val = '0'
- else:
- val = unicode(val).encode('utf-8')
-
- csvs.append(val)
-
- writer.writerow(csvs)
def command_lookup(engine_uri, name):
# XXX don't require uri! somehow
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
- given by the URI.
- csvexport {uri} [dir] Export data from the database given by the URI
- to a set of CSVs.
- Directory defaults to cwd.
+usage: pokedex {command} [options...]
+Run `pokedex setup` first, or nothing will work!
+
+Commands:
+ help Displays this message.
+ lookup [thing] Look up something in the Pokédex.
+
+System commands:
+ load Load Pokédex data into a database from CSV files.
+ dump Dump Pokédex data from a database into CSV files.
+
+Options:
+ -d|--directory By default, load and dump will use the CSV files in the
+ pokedex install directory. Use this option to specify
+ a different directory.
+ -D|--drop-tables With load, drop all tables before loading data.
+ -e|--engine=URI By default, all commands try to use a SQLite database
+ in the pokedex install directory. Use this option to
+ specify an alternate database.
""".encode(sys.getdefaultencoding(), 'replace')
sys.exit(0)
--- /dev/null
+"""CSV to database or vice versa."""
+import csv
+import pkg_resources
+import sys
+
+from sqlalchemy.orm.attributes import instrumentation_registry
+import sqlalchemy.types
+
+from pokedex.db import metadata
+import pokedex.db.tables as tables
+
+
+def load(session, directory=None, drop_tables=False):
+ """Load data from CSV files into the given database session.
+
+ Tables are created automatically.
+
+ `session`
+ SQLAlchemy session to use.
+
+ `directory`
+ Directory the CSV files reside in. Defaults to the `pokedex` data
+ directory.
+
+ `drop_tables`
+ If set to True, existing `pokedex`-related tables will be dropped.
+ """
+
+ if not directory:
+ directory = pkg_resources.resource_filename('pokedex', 'data/csv')
+
+ # Drop all tables if requested
+ if options.drop_tables:
+ print 'Dropping tables...'
+ metadata.drop_all()
+
+ metadata.create_all()
+
+ # 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.TableBase
+ orm_classes = {} # table object => table class
+
+ for name in dir(tables):
+ # dir() returns strings! How /convenient/.
+ thingy = getattr(tables, 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" % (directory, table_name), 'rb')
+ except IOError:
+ # File doesn't exist; don't load anything!
+ print 'no data!'
+ continue
+
+ 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. Pull these out and add
+ # them to the session last
+ # ASSUMPTION: Self-referential tables have a single PK called "id"
+ deferred_rows = [] # ( row referring to id, [foreign ids we need] )
+ seen_ids = {} # primary key we've seen => 1
+
+ # Fetch foreign key columns that point at this table, if any
+ self_ref_columns = []
+ for column in table_obj.c:
+ if any(_.references(table_obj) for _ in column.foreign_keys):
+ self_ref_columns.append(column)
+
+ for csvs in reader:
+ row = table_class()
+
+ for column_name, value in zip(column_names, csvs):
+ column = table_obj.c[column_name]
+ if column.nullable and value == '':
+ # Empty string in a nullable column really means NULL
+ value = None
+ elif isinstance(column.type, sqlalchemy.types.Boolean):
+ # Boolean values are stored as string values 0/1, but both
+ # of those evaluate as true; SQLA wants True/False
+ if value == '0':
+ value = False
+ else:
+ value = True
+ else:
+ # Otherwise, unflatten from bytes
+ value = value.decode('utf-8')
+
+ setattr(row, column_name, value)
+
+ # May need to stash this row and add it later if it refers to a
+ # later row in this table
+ if self_ref_columns:
+ foreign_ids = [getattr(row, _.name) for _ in self_ref_columns]
+ foreign_ids = [_ for _ in foreign_ids if _] # remove NULL ids
+
+ if not foreign_ids:
+ # NULL key. Remember this row and add as usual.
+ seen_ids[row.id] = 1
+
+ elif all(_ in seen_ids for _ in foreign_ids):
+ # Non-NULL key we've already seen. Remember it and commit
+ # so we know the old row exists when we add the new one
+ session.commit()
+ seen_ids[row.id] = 1
+
+ else:
+ # Non-NULL future id. Save this and insert it later!
+ deferred_rows.append((row, foreign_ids))
+ continue
+
+ session.add(row)
+
+ session.commit()
+
+ # Attempt to add any spare rows we've collected
+ for row, foreign_ids in deferred_rows:
+ if not all(_ in seen_ids for _ in foreign_ids):
+ # Could happen if row A refers to B which refers to C.
+ # This is ridiculous and doesn't happen in my data so far
+ raise ValueError("Too many levels of self-reference! "
+ "Row was: " + str(row.__dict__))
+
+ session.add(row)
+ seen_ids[row.id] = 1
+ session.commit()
+
+ print 'loaded'
+
+
+
+def dump(session, directory=None):
+ """Dumps the contents of a database to a set of CSV files. Probably not
+ useful to anyone besides a developer.
+
+ `session`
+ SQLAlchemy session to use.
+
+ `directory`
+ Directory the CSV files should be put in. Defaults to the `pokedex`
+ data directory.
+ """
+
+ if not directory:
+ directory = pkg_resources.resource_filename('pokedex', 'data/csv')
+
+ for table_name in sorted(metadata.tables.keys()):
+ print table_name
+ table = metadata.tables[table_name]
+
+ writer = csv.writer(open("%s/%s.csv" % (directory, table_name), 'wb'),
+ lineterminator='\n')
+ columns = [col.name for col in table.columns]
+ writer.writerow(columns)
+
+ 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
+ val = getattr(row, col)
+ if val == None:
+ val = ''
+ elif val == True:
+ val = '1'
+ elif val == False:
+ val = '0'
+ else:
+ val = unicode(val).encode('utf-8')
+
+ csvs.append(val)
+
+ writer.writerow(csvs)
projects / zzz-pokedex.git / commitdiff
