118 lines
4.8 KiB
Python
118 lines
4.8 KiB
Python
# File: migrations/env.py
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import os
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import sys
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import warnings
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import json
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import importlib
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from logging.config import fileConfig
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from sqlalchemy import create_engine, pool
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from alembic import context
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# ─── Suppress harmless warnings about FK cycles ───────────────────────────────
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warnings.filterwarnings(
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"ignore",
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r"Cannot correctly sort tables; there are unresolvable cycles between tables.*"
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)
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# ─── Ensure project root is on sys.path ──────────────────────────────────────
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project_root = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
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sys.path.insert(0, project_root)
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# ─── Load environment vars so DB URL is available ────────────────────────────
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from dotenv import load_dotenv, find_dotenv
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dotenv = find_dotenv()
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if dotenv:
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load_dotenv(dotenv, override=True)
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# ─── Dynamically import every plugin’s models *before* capturing metadata ────
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plugins_dir = os.path.join(project_root, "plugins")
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for plugin in sorted(os.listdir(plugins_dir)):
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manifest = os.path.join(plugins_dir, plugin, "plugin.json")
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if not os.path.isfile(manifest):
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continue
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try:
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meta = json.load(open(manifest))
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except Exception:
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continue
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for model_mod in meta.get("models", []):
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try:
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importlib.import_module(model_mod)
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except ImportError:
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pass
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for sp in meta.get("subplugins", []):
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for model_mod in sp.get("models", []):
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try:
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importlib.import_module(model_mod)
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except ImportError:
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pass
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# ─── Alembic config & logging ────────────────────────────────────────────────
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config = context.config
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fileConfig(config.config_file_name)
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# ─── Now import the application’s metadata ───────────────────────────────────
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from app import db
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target_metadata = db.metadata
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# ─── Hook to skip unwanted objects (never drop tables) ───────────────────────
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def include_object(obj, name, type_, reflected, compare_to):
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# skip tables present in DB but not in models
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if type_ == "table" and reflected and compare_to is None:
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return False
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# skip constraints & indexes
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if type_ in ("foreign_key_constraint", "unique_constraint", "index"):
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return False
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return True
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# ─── Helper to build the DB URL ───────────────────────────────────────────────
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def get_url():
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url = config.get_main_option("sqlalchemy.url")
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if url:
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return url.strip()
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url = os.environ.get("DATABASE_URL")
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if url:
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return url
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u = os.environ.get("MYSQL_USER")
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p = os.environ.get("MYSQL_PASSWORD")
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h = os.environ.get("MYSQL_HOST", "db")
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pt= os.environ.get("MYSQL_PORT", "3306")
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dbn= os.environ.get("MYSQL_DATABASE")
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if u and p and dbn:
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return f"mysql+pymysql://{u}:{p}@{h}:{pt}/{dbn}"
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raise RuntimeError("No DB URL configured")
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# ─── Offline migrations ──────────────────────────────────────────────────────
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def run_migrations_offline():
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context.configure(
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url=get_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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compare_type=True,
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compare_server_default=True,
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include_object=include_object,
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)
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with context.begin_transaction():
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context.run_migrations()
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# ─── Online migrations ───────────────────────────────────────────────────────
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def run_migrations_online():
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engine = create_engine(get_url(), poolclass=pool.NullPool)
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with engine.connect() as conn:
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context.configure(
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connection=conn,
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target_metadata=target_metadata,
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compare_type=True,
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compare_server_default=True,
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include_object=include_object,
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)
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with context.begin_transaction():
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context.run_migrations()
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# ─── Entrypoint ─────────────────────────────────────────────────────────────
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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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