alembic init

alembic/README

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+Generic single-database configuration.

alembic/env.py

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+import os
+from logging.config import fileConfig
+
+from dotenv import load_dotenv
+from sqlalchemy import engine_from_config, pool
+
+from alembic import context
+from src.models_db import BaseModelDb
+
+load_dotenv()  # reads .env into os.environ
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Override the placeholder in alembic.ini
+config.set_main_option("sqlalchemy.url", os.environ["DATABASE_URL"])
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = BaseModelDb.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() -> None:
+    """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=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """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 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()

alembic/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, Sequence[str], None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}

alembic/versions/605e46acc08e_.py

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+"""empty message
+
+Revision ID: 605e46acc08e
+Revises: 
+Create Date: 2026-09-04 14:52:00.681450
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '605e46acc08e'
+down_revision: Union[str, Sequence[str], None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('category',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('name', sa.String(), nullable=False),
+    sa.Column('parent_id', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['parent_id'], ['category.id'], ),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('name', 'parent_id', name='uq_category_name_parent')
+    )
+    op.create_table('import_b4w',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('id_b4w', sa.Integer(), nullable=False),
+    sa.Column('account_iban', sa.String(), nullable=False),
+    sa.Column('account_currency', sa.String(length=3), nullable=False),
+    sa.Column('date_valid', sa.Date(), nullable=False),
+    sa.Column('date_book', sa.Date(), nullable=True),
+    sa.Column('amount', sa.Numeric(precision=12, scale=2), nullable=False),
+    sa.Column('amount_currency', sa.String(length=3), nullable=False),
+    sa.Column('sign', sa.Integer(), nullable=False),
+    sa.Column('reference', sa.String(), nullable=True),
+    sa.Column('other_name', sa.String(), nullable=True),
+    sa.Column('other_iban', sa.String(), nullable=True),
+    sa.Column('category_id', sa.Integer(), nullable=True),
+    sa.Column('notes', sa.String(), nullable=True),
+    sa.ForeignKeyConstraint(['category_id'], ['category.id'], ),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('id_b4w')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('import_b4w')
+    op.drop_table('category')
+    # ### end Alembic commands ###