Sqlalchemy existing database

Sqlalchemy existing db file

from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import Session
from sqlalchemy import create_engine

Base = automap_base()

# engine, suppose it has two tables 'user' and 'address' set up
engine = create_engine("sqlite:///mydatabase.db")

# reflect the tables
Base.prepare(engine, reflect=True)

# mapped classes are now created with names by default
# matching that of the table name.
User = Base.classes.user
Address = Base.classes.address

session = Session(engine)

# rudimentary relationships are produced
session.add(Address(email_address="foo@bar.com", user=User(name="foo")))
session.commit()

# collection-based relationships are by default named
# "<classname>_collection"
print (u1.address_collection)

Source: stackoverflow.com

Similar codes

1 vote146 views1 answer
Postgres set column equal to another
SQL
1 vote154 views1 answer
Psql human readable
SQL
2 votes167 views1 answer
Removing view
SQL
1 vote161 views3 answers
How to reset id column in sql server
SQL
1 vote172 views1 answer
Oracle user last connection date
SQL
1 vote150 views1 answer
Sometimes i cant edit sql developer
SQL
1 vote140 views1 answer
Foreign key constraint in ms sql
SQL
0 vote203 views1 answer
Updating database in sql
SQL
0 vote186 views2 answers
Wordpress change url after migration mysql query
SQL
0 vote153 views1 answer
Mysql set variable to today's date
SQL