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March 9, 2018 04:47
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#! /usr/bin/env python | |
from __future__ import print_function | |
import datetime | |
import uuid | |
import random | |
from faker import Faker | |
from sqlalchemy import create_engine | |
from sqlalchemy.orm import scoped_session, sessionmaker, relationship | |
from sqlalchemy.ext.declarative import declarative_base | |
from sqlalchemy import (Boolean, BigInteger, Column, DateTime, ForeignKey, Index, Integer, | |
Numeric, String, Table) | |
from sqlalchemy.dialects.postgresql import JSONB, UUID | |
Base = declarative_base() | |
SQLALCHEMY_DATABASE_URI = 'postgres://localhost/example' | |
class Customer(Base): | |
__tablename__ = 'customers' | |
id = Column(UUID, primary_key=True) | |
name = Column(String(100)) | |
comment = Column(String(500)) | |
orders = relationship( | |
'Order', | |
foreign_keys='[Order.customer_id]', | |
back_populates='customer' | |
) | |
class Order(Base): | |
__tablename__ = 'orders' | |
id = Column(UUID, primary_key=True) | |
address_unit = Column(String(50)) | |
address_line_1 = Column(String(500)) | |
address_city = Column(String(100)) | |
address_zip = Column(String(50)) | |
address_country = Column(String(100)) | |
customer_id = Column(UUID, ForeignKey('customers.id', ondelete='CASCADE')) | |
customer = relationship('Customer', foreign_keys=[customer_id], back_populates='orders') | |
def setup_db_session(expire_on_commit=True): | |
# DB connection added to request globals via Flask.before_request() | |
engine = create_engine( | |
SQLALCHEMY_DATABASE_URI, | |
convert_unicode=True, | |
) | |
db_session = scoped_session(sessionmaker( | |
autocommit=False, | |
autoflush=False, | |
expire_on_commit=expire_on_commit, | |
bind=engine | |
)) | |
Base.query = db_session.query_property() | |
return db_session | |
def create_tables(db_session): | |
# create the DB tables | |
engine = create_engine(SQLALCHEMY_DATABASE_URI, convert_unicode=True) | |
Base.metadata.create_all(bind=engine) | |
db_session.commit() | |
if __name__ == '__main__': | |
db_session = setup_db_session() | |
create_tables(db_session) | |
faker = Faker() | |
for x in xrange(1500000): | |
c = Customer( | |
id=str(uuid.uuid4()), | |
name=faker.name(), | |
comment=faker.sentence(), | |
) | |
db_session.add(c) | |
# random number of orders | |
for y in xrange(random.randint(1,3)): | |
o = Order( | |
id=str(uuid.uuid4()), | |
customer=c, | |
address_unit=faker.building_number(), | |
address_line_1=faker.street_address(), | |
address_city=faker.city(), | |
address_zip=faker.zipcode(), | |
address_country=faker.country(), | |
) | |
db_session.add(o) | |
# commit every 10000 inserts | |
if x > 0 and x % 10000 == 0: | |
print('{} {}'.format(datetime.datetime.now().isoformat(), x)) | |
db_session.commit() | |
print('{} {}'.format(datetime.datetime.now().isoformat(), x)) | |
db_session.commit() |
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