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

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
try:
    uri = os.environ['PYCROFT_DB_URI']
except KeyError:
    raise ValueError("Please Provide a valid uri in `PYCROFT_DB_URI`.")
engine = create_engine(uri)

# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
from pycroft.model.base import ModelBase
target_metadata = ModelBase.metadata

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


def run_migrations_offline():
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    # url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=uri, target_metadata=target_metadata, literal_binds=True)

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


def run_migrations_online():
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

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

    with engine.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()

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

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
try:
    uri = os.environ['PYCROFT_DB_URI']
except KeyError:
    raise ValueError("Please Provide a valid uri in `PYCROFT_DB_URI`.")
engine = create_engine(uri)

# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
from pycroft.model.base import ModelBase
target_metadata = ModelBase.metadata

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


def run_migrations_offline():
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    # url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=uri,
        target_metadata=target_metadata,
        literal_binds=True,
        include_object=include_object,
    )

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


def run_migrations_online():
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

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

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

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


def include_object(object, name, type_, reflected, compare_to):
    # skip objects marked with "is_view"
    if object.info.get("is_view", False):
        return False

    return True


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

Exclude views in alembic