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 vote285 views1 answer
Oracle see column type
SQL
5 votes195 views2 answers
Ranking functions in sql
SQL
1 vote178 views1 answer
How much every mysql database record takes from diskspace
SQL
0 vote184 views1 answer
Create a PostgreSQL user django on mac
SQL
10 votes190 views4 answers
SELECT FROM WHERE
SQL
0 vote258 views1 answer
How to check event scheduler status mysql
SQL
0 vote206 views1 answer
How to alter length character varying postgres
SQL
2 votes175 views1 answer
Sqlplus clear screen
SQL
1 vote184 views3 answers
Mysql connection string
SQL
0 vote136 views1 answer
Insert and initialize a SQL column with value dependent on another column data
SQL