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

4 votes134 views3 answers
Sql drop primary key
SQL
10 votes110 views3 answers
Join multiple tables sql
SQL
0 vote124 views1 answer
Parent: [Error: SQLITE_READONLY: attempt to write a readonly database] {
SQL
0 vote135 views1 answer
Tsql table column constraint must be uppercase
SQL
0 vote146 views1 answer
Sqlite unique multiple columns
SQL
0 vote124 views1 answer
Mysql count grouped rows
SQL
31 votes134 views4 answers
How to get duplicate records with multiple field in sql
SQL
0 vote149 views1 answer
Mysql dump with table query
SQL
15 votes140 views3 answers
Create table with primary key auto increment in sql
SQL
1 vote130 views1 answer
Sql server locks
SQL