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RomanVetrovRomanVetrov
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feat: добавить миграции Alembic для users tasks tags
Что сделано: - настроен Alembic для асинхронного SQLAlchemy проекта - добавлены миграции создания users и tasks - добавлены миграции создания tags и связующей таблицы task_tags
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‎alembic.ini‎

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# A generic, single database configuration.
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[alembic]
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# path to migration scripts.
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# this is typically a path given in POSIX (e.g. forward slashes)
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# format, relative to the token %(here)s which refers to the location of this
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# ini file
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script_location = %(here)s/alembic
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# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
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# Uncomment the line below if you want the files to be prepended with date and time
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# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
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# for all available tokens
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# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
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# Or organize into date-based subdirectories (requires recursive_version_locations = true)
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# file_template = %%(year)d/%%(month).2d/%%(day).2d_%%(hour).2d%%(minute).2d_%%(second).2d_%%(rev)s_%%(slug)s
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# sys.path path, will be prepended to sys.path if present.
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# defaults to the current working directory. for multiple paths, the path separator
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# is defined by "path_separator" below.
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prepend_sys_path = .
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# timezone to use when rendering the date within the migration file
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# as well as the filename.
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# If specified, requires the tzdata library which can be installed by adding
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# `alembic[tz]` to the pip requirements.
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# string value is passed to ZoneInfo()
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# leave blank for localtime
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# timezone =
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# max length of characters to apply to the "slug" field
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# truncate_slug_length = 40
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# set to 'true' to run the environment during
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# the 'revision' command, regardless of autogenerate
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# revision_environment = false
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# set to 'true' to allow .pyc and .pyo files without
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# a source .py file to be detected as revisions in the
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# versions/ directory
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# sourceless = false
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# version location specification; This defaults
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# to <script_location>/versions. When using multiple version
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# directories, initial revisions must be specified with --version-path.
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# The path separator used here should be the separator specified by "path_separator"
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# below.
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# version_locations = %(here)s/bar:%(here)s/bat:%(here)s/alembic/versions
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# path_separator; This indicates what character is used to split lists of file
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# paths, including version_locations and prepend_sys_path within configparser
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# files such as alembic.ini.
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# The default rendered in new alembic.ini files is "os", which uses os.pathsep
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# to provide os-dependent path splitting.
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#
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# Note that in order to support legacy alembic.ini files, this default does NOT
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# take place if path_separator is not present in alembic.ini. If this
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# option is omitted entirely, fallback logic is as follows:
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#
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# 1. Parsing of the version_locations option falls back to using the legacy
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# "version_path_separator" key, which if absent then falls back to the legacy
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# behavior of splitting on spaces and/or commas.
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# 2. Parsing of the prepend_sys_path option falls back to the legacy
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# behavior of splitting on spaces, commas, or colons.
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#
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# Valid values for path_separator are:
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#
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# path_separator = :
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# path_separator = ;
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# path_separator = space
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# path_separator = newline
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#
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# Use os.pathsep. Default configuration used for new projects.
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path_separator = os
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# set to 'true' to search source files recursively
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# in each "version_locations" directory
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# new in Alembic version 1.10
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# recursive_version_locations = false
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# the output encoding used when revision files
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# are written from script.py.mako
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# output_encoding = utf-8
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# database URL. This is consumed by the user-maintained env.py script only.
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# other means of configuring database URLs may be customized within the env.py
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# file.
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# URL берётся из .env через env.py, не хардкодим здесь
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# sqlalchemy.url = driver://user:pass@localhost/dbname
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[post_write_hooks]
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# post_write_hooks defines scripts or Python functions that are run
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# on newly generated revision scripts. See the documentation for further
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# detail and examples
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# format using "black" - use the console_scripts runner, against the "black" entrypoint
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# hooks = black
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# black.type = console_scripts
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# black.entrypoint = black
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# black.options = -l 79 REVISION_SCRIPT_FILENAME
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# lint with attempts to fix using "ruff" - use the module runner, against the "ruff" module
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# hooks = ruff
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# ruff.type = module
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# ruff.module = ruff
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# ruff.options = check --fix REVISION_SCRIPT_FILENAME
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# Alternatively, use the exec runner to execute a binary found on your PATH
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# hooks = ruff
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# ruff.type = exec
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# ruff.executable = ruff
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# ruff.options = check --fix REVISION_SCRIPT_FILENAME
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# Logging configuration. This is also consumed by the user-maintained
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# env.py script only.
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[loggers]
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keys = root,sqlalchemy,alembic
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[handlers]
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keys = console
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[formatters]
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keys = generic
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[logger_root]
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level = WARNING
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handlers = console
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qualname =
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[logger_sqlalchemy]
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level = WARNING
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handlers =
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qualname = sqlalchemy.engine
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[logger_alembic]
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level = INFO
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handlers =
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qualname = alembic
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[handler_console]
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class = StreamHandler
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args = (sys.stderr,)
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level = NOTSET
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formatter = generic
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[formatter_generic]
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format = %(levelname)-5.5s [%(name)s] %(message)s
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datefmt = %H:%M:%S

‎alembic/README‎

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Generic single-database configuration with an async dbapi.

‎alembic/env.py‎

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import asyncio
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from logging.config import fileConfig
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from alembic import context
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from sqlalchemy import pool
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from sqlalchemy.engine import Connection
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from sqlalchemy.ext.asyncio import async_engine_from_config
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from app.config import settings
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from app.database import Base
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# импортируем модели чтобы Alembic видел таблицы при autogenerate
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import app.models.user # noqa: F401
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import app.models.task # noqa: F401
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import app.models.tag # noqa: F401
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config = context.config
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if config.config_file_name is not None:
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fileConfig(config.config_file_name)
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# подключаем наши метаданные для autogenerate
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target_metadata = Base.metadata
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# подставляем URL из .env вместо alembic.ini
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config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)
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def run_migrations_offline() -> None:
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url = config.get_main_option("sqlalchemy.url")
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context.configure(
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url=url,
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target_metadata=target_metadata,
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literal_binds=True,
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dialect_opts={"paramstyle": "named"},
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)
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with context.begin_transaction():
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context.run_migrations()
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def do_run_migrations(connection: Connection) -> None:
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context.configure(connection=connection, target_metadata=target_metadata)
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with context.begin_transaction():
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context.run_migrations()
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async def run_async_migrations() -> None:
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connectable = async_engine_from_config(
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config.get_section(config.config_ini_section, {}),
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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async with connectable.connect() as connection:
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await connection.run_sync(do_run_migrations)
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await connectable.dispose()
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def run_migrations_online() -> None:
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asyncio.run(run_async_migrations())
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()

‎alembic/script.py.mako‎

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

‎alembic/versions/6392a705d4e1_create_tags_and_task_tags.py‎

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"""create tags and task_tags
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Revision ID: 6392a705d4e1
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Revises: d3360cd6d7ff
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Create Date: 2026-03-08 18:15:33.531165
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"""
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from typing import Sequence, Union
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from alembic import op
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import sqlalchemy as sa
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# revision identifiers, used by Alembic.
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revision: str = "6392a705d4e1"
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down_revision: Union[str, Sequence[str], None] = "d3360cd6d7ff"
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def upgrade() -> None:
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"""Upgrade schema."""
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# ### commands auto generated by Alembic - please adjust! ###
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op.create_table(
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"tags",
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sa.Column("id", sa.UUID(), nullable=False),
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sa.Column("name", sa.String(length=50), nullable=False),
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sa.Column("color", sa.String(length=7), nullable=False),
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sa.Column(
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"created_at",
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sa.DateTime(timezone=True),
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server_default=sa.text("timezone('utc', now())"),
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nullable=False,
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),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint("name"),
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)
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op.create_table(
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"task_tags",
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sa.Column("task_id", sa.UUID(), nullable=False),
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sa.Column("tag_id", sa.UUID(), nullable=False),
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sa.ForeignKeyConstraint(["tag_id"], ["tags.id"], ondelete="CASCADE"),
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sa.ForeignKeyConstraint(["task_id"], ["tasks.id"], ondelete="CASCADE"),
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sa.PrimaryKeyConstraint("task_id", "tag_id"),
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)
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# ### end Alembic commands ###
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def downgrade() -> None:
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"""Downgrade schema."""
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# ### commands auto generated by Alembic - please adjust! ###
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op.drop_table("task_tags")
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op.drop_table("tags")
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# ### end Alembic commands ###

‎alembic/versions/d3360cd6d7ff_create_users_and_tasks.py‎

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"""create users and tasks
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Revision ID: d3360cd6d7ff
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Revises:
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Create Date: 2026-03-08 16:13:37.899287
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"""
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from typing import Sequence, Union
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from alembic import op
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import sqlalchemy as sa
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# revision identifiers, used by Alembic.
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revision: str = "d3360cd6d7ff"
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down_revision: Union[str, Sequence[str], None] = None
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def upgrade() -> None:
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"""Upgrade schema."""
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# ### commands auto generated by Alembic - please adjust! ###
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op.create_table(
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"users",
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sa.Column("id", sa.UUID(), nullable=False),
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sa.Column("email", sa.String(length=254), nullable=False),
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sa.Column("hashed_password", sa.String(length=255), nullable=False),
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sa.Column(
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"is_active", sa.Boolean(), server_default=sa.text("true"), nullable=False
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),
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sa.Column(
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"updated_at",
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sa.DateTime(timezone=True),
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server_default=sa.text("timezone('utc', now())"),
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nullable=False,
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),
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sa.Column(
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"created_at",
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sa.DateTime(timezone=True),
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server_default=sa.text("timezone('utc', now())"),
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nullable=False,
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),
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sa.PrimaryKeyConstraint("id"),
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)
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op.create_index(op.f("ix_users_email"), "users", ["email"], unique=True)
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op.create_table(
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"tasks",
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sa.Column("id", sa.UUID(), nullable=False),
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sa.Column("title", sa.String(length=255), nullable=False),
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sa.Column("description", sa.Text(), nullable=True),
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sa.Column("status", sa.String(length=20), nullable=False),
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sa.Column("priority", sa.String(length=10), nullable=False),
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sa.Column("due_date", sa.Date(), nullable=True),
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sa.Column("user_id", sa.UUID(), nullable=False),
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sa.Column(
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"created_at",
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sa.DateTime(timezone=True),
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server_default=sa.text("timezone('utc', now())"),
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nullable=False,
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),
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sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
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sa.PrimaryKeyConstraint("id"),
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)
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# ### end Alembic commands ###
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def downgrade() -> None:
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"""Downgrade schema."""
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# ### commands auto generated by Alembic - please adjust! ###
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op.drop_table("tasks")
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op.drop_index(op.f("ix_users_email"), table_name="users")
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op.drop_table("users")
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# ### end Alembic commands ###

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