Alembic Settings to Make Migrations Automatically from Models (SQLAlchemy)

env.py

from alembic import context
from sqlalchemy import pool
from sqlalchemy import engine_from_config
from logging.config import fileConfig
import os
import sys

sys.path.append(os.getcwd())

if True:
    from db.models import Base # import Base from your models.py here

"""
this is the Alembic Config object, which provides
access to the values within the .ini file in use.
"""
config = context.config

# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(config.config_file_name)
"""
Add your model's MetaData object herefor 'autogenerate' support
"""
target_metadata = Base.metadata

"""
other values from the config, defined by the needs of env.py, can be acquired by
my_important_option = config.get_main_option("my_important_option")
... etc.
"""


def run_migrations_offline():

    url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )

    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online():

    connectable = engine_from_config(
        config.get_section(config.config_ini_section),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        context.configure(
            connection=connection, target_metadata=target_metadata
        )

        with context.begin_transaction():
            context.run_migrations()


if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()

migrate.sh

# Make migrations
alembic revision --autogenerate -m "message"

# Migrate to latest version
alembic upgrade head