SQLAlchemy snippets

indices.py

from sqlalchemy import Column, Integer, String, Index
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class Person(Base):
    __tablename__ = 'person'
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    first_name = Column(String(64), index=True)  # A single-column index
    last_name = Column(String(64), index=True)
    email = Column(String(64))
    # Yes, String(64) is probably not a good data type for these columns

Index('email_name_idx', Person.email, Person.first_name)

# Equates to:
# CREATE TABLE `person` (
#     `id` INT(11) NOT NULL AUTOINCREMENT,
#     `first_name` VARCHAR(64) DEFAULT NULL,
#     `last_name` VARCHAR(64) DEFAULT NULL,
#     `email` VARCHAR(64) DEFAULT NULL,
#     PRIMARY KEY (`id`),
#     KEY `first_name` (`first_name`),
#     KEY `last_name` (`last_name`),
#     KEY `email_name_idx` (`email`, `first_name`),
# ) ...;

setting_table_args.py

from sqlalchemy import Column, Integer
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class Person(Base):
    __tablename__ = 'person'
    __table_args__ = {
        'mysql_engine': 'InnoDB',
        'mysql_default_charset': 'utf8mb4'
    }
    id = Column(Integer, primary_key=True, autoincrement=True)

# Equates to:
# CREATE TABLE `person` (
#     `id` INT(11) NOT NULL AUTOINCREMENT,
#     PRIMARY KEY (`id`)
# ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;