Edit File: pwiz
#!/opt/alt/python35/bin/python3 import datetime import sys from getpass import getpass from optparse import OptionParser from peewee import * from peewee import print_ from peewee import __version__ as peewee_version from playhouse.reflection import * TEMPLATE = """from peewee import *%s database = %s('%s', **%s) class UnknownField(object): def __init__(self, *_, **__): pass class BaseModel(Model): class Meta: database = database """ DATABASE_ALIASES = { MySQLDatabase: ['mysql', 'mysqldb'], PostgresqlDatabase: ['postgres', 'postgresql'], SqliteDatabase: ['sqlite', 'sqlite3'], } DATABASE_MAP = dict((value, key) for key in DATABASE_ALIASES for value in DATABASE_ALIASES[key]) def make_introspector(database_type, database_name, **kwargs): if database_type not in DATABASE_MAP: err('Unrecognized database, must be one of: %s' % ', '.join(DATABASE_MAP.keys())) sys.exit(1) schema = kwargs.pop('schema', None) DatabaseClass = DATABASE_MAP[database_type] db = DatabaseClass(database_name, **kwargs) return Introspector.from_database(db, schema=schema) def print_models(introspector, tables=None, preserve_order=False): database = introspector.introspect(table_names=tables) print_(TEMPLATE % ( introspector.get_additional_imports(), introspector.get_database_class().__name__, introspector.get_database_name(), repr(introspector.get_database_kwargs()))) def _print_table(table, seen, accum=None): accum = accum or [] foreign_keys = database.foreign_keys[table] for foreign_key in foreign_keys: dest = foreign_key.dest_table # In the event the destination table has already been pushed # for printing, then we have a reference cycle. if dest in accum and table not in accum: print_('# Possible reference cycle: %s' % dest) # If this is not a self-referential foreign key, and we have # not already processed the destination table, do so now. if dest not in seen and dest not in accum: seen.add(dest) if dest != table: _print_table(dest, seen, accum + [table]) print_('class %s(BaseModel):' % database.model_names[table]) columns = database.columns[table].items() if not preserve_order: columns = sorted(columns) primary_keys = database.primary_keys[table] for name, column in columns: skip = all([ name in primary_keys, name == 'id', len(primary_keys) == 1, column.field_class in introspector.pk_classes]) if skip: continue if column.primary_key and len(primary_keys) > 1: # If we have a CompositeKey, then we do not want to explicitly # mark the columns as being primary keys. column.primary_key = False print_(' %s' % column.get_field()) print_('') print_(' class Meta:') print_(' db_table = \'%s\'' % table) multi_column_indexes = database.multi_column_indexes(table) if multi_column_indexes: print_(' indexes = (') for fields, unique in sorted(multi_column_indexes): print_(' ((%s), %s),' % ( ', '.join("'%s'" % field for field in fields), unique, )) print_(' )') if introspector.schema: print_(' schema = \'%s\'' % introspector.schema) if len(primary_keys) > 1: pk_field_names = sorted([ field.name for col, field in columns if col in primary_keys]) pk_list = ', '.join("'%s'" % pk for pk in pk_field_names) print_(' primary_key = CompositeKey(%s)' % pk_list) print_('') seen.add(table) seen = set() for table in sorted(database.model_names.keys()): if table not in seen: if not tables or table in tables: _print_table(table, seen) def print_header(cmd_line, introspector): timestamp = datetime.datetime.now() print_('# Code generated by:') print_('# python -m pwiz %s' % cmd_line) print_('# Date: %s' % timestamp.strftime('%B %d, %Y %I:%M%p')) print_('# Database: %s' % introspector.get_database_name()) print_('# Peewee version: %s' % peewee_version) print_('') def err(msg): sys.stderr.write('\033[91m%s\033[0m\n' % msg) sys.stderr.flush() def get_option_parser(): parser = OptionParser(usage='usage: %prog [options] database_name') ao = parser.add_option ao('-H', '--host', dest='host') ao('-p', '--port', dest='port', type='int') ao('-u', '--user', dest='user') ao('-P', '--password', dest='password', action='store_true') engines = sorted(DATABASE_MAP) ao('-e', '--engine', dest='engine', default='postgresql', choices=engines, help=('Database type, e.g. sqlite, mysql or postgresql. Default ' 'is "postgresql".')) ao('-s', '--schema', dest='schema') ao('-t', '--tables', dest='tables', help=('Only generate the specified tables. Multiple table names should ' 'be separated by commas.')) ao('-i', '--info', dest='info', action='store_true', help=('Add database information and other metadata to top of the ' 'generated file.')) ao('-o', '--preserve-order', action='store_true', dest='preserve_order', help='Model definition column ordering matches source table.') return parser def get_connect_kwargs(options): ops = ('host', 'port', 'user', 'schema') kwargs = dict((o, getattr(options, o)) for o in ops if getattr(options, o)) if options.password: kwargs['password'] = getpass() return kwargs if __name__ == '__main__': raw_argv = sys.argv parser = get_option_parser() options, args = parser.parse_args() if options.preserve_order: try: from collections import OrderedDict except ImportError: err('Preserve order requires Python >= 2.7.') sys.exit(1) if len(args) < 1: err('Missing required parameter "database"') parser.print_help() sys.exit(1) connect = get_connect_kwargs(options) database = args[-1] tables = None if options.tables: tables = [table.strip() for table in options.tables.split(',') if table.strip()] introspector = make_introspector(options.engine, database, **connect) if options.info: cmd_line = ' '.join(raw_argv[1:]) print_header(cmd_line, introspector) print_models(introspector, tables, preserve_order=options.preserve_order)