47c13d82c1
- Fix revision reference in user table migration (0001_create_tasks_table -> 0001) - Add SQLite batch mode configuration to Alembic env.py - Enhance logging for SQLite dialect detection - Ensure consistent configuration for both online and offline migrations
316 lines
11 KiB
Python
316 lines
11 KiB
Python
from logging.config import fileConfig
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import os
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import sys
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import logging
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import sqlite3
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from sqlalchemy import engine_from_config, event
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from sqlalchemy import pool
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from alembic import context
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# Add the parent directory to the Python path
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sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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config = context.config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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fileConfig(config.config_file_name)
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# Setup logger
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logger = logging.getLogger("alembic.env")
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# Ensure database directory exists and is writable
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db_url = config.get_main_option("sqlalchemy.url")
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if db_url.startswith("sqlite:///"):
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# Extract the path part after sqlite:///
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if db_url.startswith("sqlite:////"): # Absolute path (4 slashes)
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db_path = db_url[len("sqlite:///") :]
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else: # Relative path (3 slashes)
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db_path = db_url[len("sqlite:///") :]
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# Get the directory path
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db_dir = os.path.dirname(db_path)
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logger.info(f"Database URL: {db_url}")
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logger.info(f"Database path: {db_path}")
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logger.info(f"Database directory: {db_dir}")
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# Define alternate paths to try if the primary path isn't writable
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alternate_paths = [
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"/app/storage/db/db.sqlite", # Primary alternate
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os.path.join(os.path.expanduser("~"), "db.sqlite"), # Home directory
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"/tmp/taskmanager/db.sqlite", # Fallback to tmp
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]
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# Try to create the main directory first
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db_created = False
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for attempt_path in [db_path] + alternate_paths:
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if db_created:
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break
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try:
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# Get directory part
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current_dir = os.path.dirname(attempt_path)
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# Create directory if it doesn't exist
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os.makedirs(current_dir, exist_ok=True)
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logger.info(f"Ensured directory exists: {current_dir}")
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# Set directory permissions if possible (755 = rwxr-xr-x)
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try:
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import stat
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dir_mode = (
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stat.S_IRWXU
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| stat.S_IRGRP
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| stat.S_IXGRP
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| stat.S_IROTH
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| stat.S_IXOTH
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)
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os.chmod(current_dir, dir_mode)
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logger.info(f"Set directory permissions on {current_dir}")
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except Exception as chmod_err:
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logger.warning(f"Could not set directory permissions: {chmod_err}")
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# Check if the directory is writable
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if not os.access(current_dir, os.W_OK):
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logger.warning(
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f"Directory {current_dir} exists but is not writable, trying next path"
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)
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continue
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# Try to create/access the database file
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try:
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# Create an empty file if it doesn't exist
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if not os.path.exists(attempt_path):
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with open(attempt_path, "wb") as f:
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f.write(b"") # Write empty content
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logger.info(f"Created database file: {attempt_path}")
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# Try to set file permissions (666 = rw-rw-rw-)
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try:
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file_mode = (
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stat.S_IRUSR
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| stat.S_IWUSR
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| stat.S_IRGRP
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| stat.S_IWGRP
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| stat.S_IROTH
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| stat.S_IWOTH
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)
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os.chmod(attempt_path, file_mode)
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logger.info(f"Set file permissions on {attempt_path}")
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except Exception as chmod_err:
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logger.warning(f"Could not set file permissions: {chmod_err}")
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# Verify file is writable
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if not os.access(attempt_path, os.W_OK):
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logger.warning(
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f"File {attempt_path} exists but is not writable, trying next path"
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)
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continue
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# Test direct SQLite connection
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try:
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conn = sqlite3.connect(attempt_path)
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conn.execute("SELECT 1")
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conn.close()
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logger.info(
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f"Successfully connected to SQLite database at {attempt_path}"
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)
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# If this isn't the original path, update the config
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if attempt_path != db_path:
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new_url = f"sqlite:///{attempt_path}"
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logger.info(f"Updating database URL to: {new_url}")
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config.set_main_option("sqlalchemy.url", new_url)
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db_path = attempt_path # Update the db_path for diagnostics
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db_created = True
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break
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except Exception as e:
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logger.error(f"Direct SQLite connection failed: {e}")
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raise
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except Exception as e:
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logger.error(f"Could not access database file: {e}")
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raise
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except Exception as e:
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logger.error(f"Could not create/access database at {attempt_path}: {e}")
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# Continue to next path
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if not db_created:
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logger.error("Failed to create database in any of the attempted locations")
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# We'll continue anyway to show more diagnostic info in errors
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# add your model's MetaData object here
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# for 'autogenerate' support
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from app.db.base import Base # noqa
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target_metadata = Base.metadata
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# other values from the config, defined by the needs of env.py,
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# can be acquired:
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# my_important_option = config.get_main_option("my_important_option")
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# ... etc.
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def run_migrations_offline():
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"""Run migrations in 'offline' mode.
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This configures the context with just a URL
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and not an Engine, though an Engine is acceptable
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here as well. By skipping the Engine creation
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we don't even need a DBAPI to be available.
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Calls to context.execute() here emit the given string to the
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script output.
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"""
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try:
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url = config.get_main_option("sqlalchemy.url")
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logger.info(f"Running offline migrations using URL: {url}")
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# Check if this is SQLite URL
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is_sqlite = url.startswith("sqlite")
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logger.info(f"Is SQLite URL: {is_sqlite}")
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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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render_as_batch=is_sqlite, # Enable batch mode for SQLite
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)
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with context.begin_transaction():
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logger.info("Running offline migrations...")
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context.run_migrations()
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logger.info("Offline migrations completed successfully")
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except Exception as e:
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logger.error(f"Offline migration error: {e}")
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# Re-raise the error
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raise
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def run_migrations_online():
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"""Run migrations in 'online' mode.
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In this scenario we need to create an Engine
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and associate a connection with the context.
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"""
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try:
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# Get config and URL
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cfg = config.get_section(config.config_ini_section)
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url = cfg.get("sqlalchemy.url")
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logger.info(f"Running online migrations using URL: {url}")
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# Create engine with retry logic
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max_retries = 3
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last_error = None
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for retry in range(max_retries):
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try:
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logger.info(f"Connection attempt {retry + 1}/{max_retries}")
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connectable = engine_from_config(
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cfg,
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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# Configure SQLite for better reliability
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@event.listens_for(connectable, "connect")
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def setup_sqlite_connection(dbapi_connection, connection_record):
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dbapi_connection.execute("PRAGMA journal_mode=WAL")
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dbapi_connection.execute("PRAGMA synchronous=NORMAL")
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# Connect and run migrations
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with connectable.connect() as connection:
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logger.info("Connection successful")
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# Check if this is SQLite and enable batch mode if needed
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is_sqlite = connection.dialect.name == "sqlite"
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logger.info(f"Detected dialect: {connection.dialect.name}")
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if is_sqlite:
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logger.info(
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"SQLite detected, enabling batch mode for migrations"
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)
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context.configure(
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connection=connection,
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target_metadata=target_metadata,
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render_as_batch=is_sqlite, # This is essential for SQLite migrations
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)
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with context.begin_transaction():
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logger.info("Running migrations...")
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context.run_migrations()
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logger.info("Migrations completed successfully")
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return # Success, exit the function
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except Exception as e:
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last_error = e
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logger.error(f"Migration attempt {retry + 1} failed: {e}")
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if retry < max_retries - 1:
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import time
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wait_time = (retry + 1) * 2 # Exponential backoff
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logger.info(f"Retrying in {wait_time} seconds...")
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time.sleep(wait_time)
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# If we get here, all retries failed
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raise Exception(
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f"Failed to run migrations after {max_retries} attempts: {last_error}"
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)
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except Exception as e:
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logger.error(f"Migration error: {e}")
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# Print diagnostic information
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from sqlalchemy import __version__ as sa_version
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logger.error(f"SQLAlchemy version: {sa_version}")
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# Get directory info
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if url and url.startswith("sqlite:///"):
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if url.startswith("sqlite:////"): # Absolute path
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db_path = url[len("sqlite:///") :]
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else: # Relative path
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db_path = url[len("sqlite:///") :]
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db_dir = os.path.dirname(db_path)
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# Directory permissions
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if os.path.exists(db_dir):
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stats = os.stat(db_dir)
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logger.error(f"DB directory permissions: {oct(stats.st_mode)}")
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logger.error("DB directory exists: Yes")
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logger.error(f"DB directory is writable: {os.access(db_dir, os.W_OK)}")
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else:
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logger.error("DB directory exists: No")
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# File permissions if file exists
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if os.path.exists(db_path):
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stats = os.stat(db_path)
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logger.error(f"DB file permissions: {oct(stats.st_mode)}")
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logger.error("DB file exists: Yes")
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logger.error(f"DB file is writable: {os.access(db_path, os.W_OK)}")
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else:
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logger.error("DB file exists: No")
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# Re-raise the error
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raise
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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()
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