mirror of
https://github.com/pacnpal/thrillwiki_django_no_react.git
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121 lines
4.8 KiB
Python
121 lines
4.8 KiB
Python
"""
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Database configuration for thrillwiki project.
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This module configures database connections, connection pooling, and
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GeoDjango settings using python-decouple for consistent environment
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variable management.
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Why python-decouple?
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- Already used in base.py for consistency
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- Simpler API than django-environ
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- Sufficient for our configuration needs
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- Better separation of config from code
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Database URL Format:
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- PostgreSQL: postgres://user:password@host:port/dbname
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- PostGIS: postgis://user:password@host:port/dbname
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- SQLite: sqlite:///path/to/db.sqlite3
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- SpatiaLite: spatialite:///path/to/db.sqlite3
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"""
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import dj_database_url
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from decouple import config
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# =============================================================================
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# Database Configuration
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# =============================================================================
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# Parse DATABASE_URL environment variable into Django database settings
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DATABASE_URL = config("DATABASE_URL", default="postgis://thrillwiki_user:thrillwiki@localhost:5432/thrillwiki_test_db")
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# Parse the database URL
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db_config = dj_database_url.parse(DATABASE_URL)
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# Force PostGIS backend for spatial data support
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# This ensures GeoDjango features work correctly
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if "postgis" in DATABASE_URL or "postgresql" in DATABASE_URL:
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db_config["ENGINE"] = "django.contrib.gis.db.backends.postgis"
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DATABASES = {
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"default": db_config,
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}
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# =============================================================================
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# Database Connection Pooling Configuration
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# =============================================================================
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# Connection pooling improves performance by reusing database connections
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# CONN_MAX_AGE: How long to keep connections open (in seconds)
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# 0 = Close after each request (default Django behavior)
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# None = Unlimited reuse (not recommended)
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# 60 = 1 minute (good for development to prevent connection accumulation)
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# 600 = 10 minutes (good for production)
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# Check if we're in debug mode (imported from base settings)
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DEBUG = config("DEBUG", default=False, cast=bool)
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# Use shorter connection lifetime in development to prevent accumulation
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CONN_MAX_AGE = config(
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"DATABASE_CONN_MAX_AGE",
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default=60 if DEBUG else 600,
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cast=int
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)
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# Apply CONN_MAX_AGE to the default database
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DATABASES["default"]["CONN_MAX_AGE"] = CONN_MAX_AGE
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# =============================================================================
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# Database Connection Options (PostgreSQL-specific)
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# =============================================================================
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# These settings are passed to psycopg2 when creating new connections
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# Shorter timeouts in development to fail fast
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connect_timeout = config("DATABASE_CONNECT_TIMEOUT", default=5 if DEBUG else 10, cast=int)
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statement_timeout = config("DATABASE_STATEMENT_TIMEOUT", default=30000, cast=int)
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# Idle in transaction timeout: close connections that sit idle in a transaction
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# This prevents connection leaks from unclosed transactions
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idle_in_transaction_timeout = config("DATABASE_IDLE_IN_TRANSACTION_TIMEOUT", default=60000, cast=int)
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DATABASE_OPTIONS = {
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# Connection timeout in seconds
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"connect_timeout": connect_timeout,
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# PostgreSQL server-side options
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"options": (
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f"-c statement_timeout={statement_timeout} "
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f"-c idle_in_transaction_session_timeout={idle_in_transaction_timeout}"
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),
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}
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# Apply options to PostgreSQL databases
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if "postgis" in DATABASE_URL or "postgresql" in DATABASE_URL:
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DATABASES["default"].setdefault("OPTIONS", {})
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DATABASES["default"]["OPTIONS"].update(DATABASE_OPTIONS)
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# =============================================================================
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# GeoDjango Settings
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# =============================================================================
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# Library paths for GDAL and GEOS (required for GeoDjango)
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# These vary by operating system and installation method
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# macOS with Homebrew (default)
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# Linux: /usr/lib/x86_64-linux-gnu/libgdal.so
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# Docker: Usually handled by the image
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GDAL_LIBRARY_PATH = config("GDAL_LIBRARY_PATH", default="/opt/homebrew/lib/libgdal.dylib")
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GEOS_LIBRARY_PATH = config("GEOS_LIBRARY_PATH", default="/opt/homebrew/lib/libgeos_c.dylib")
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# =============================================================================
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# Read Replica Configuration (Optional)
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# =============================================================================
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# Configure read replicas for read-heavy workloads
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# Set DATABASE_READ_REPLICA_URL to enable
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DATABASE_READ_REPLICA_URL = config("DATABASE_READ_REPLICA_URL", default="")
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if DATABASE_READ_REPLICA_URL:
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replica_config = dj_database_url.parse(DATABASE_READ_REPLICA_URL)
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if "postgis" in DATABASE_READ_REPLICA_URL or "postgresql" in DATABASE_READ_REPLICA_URL:
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replica_config["ENGINE"] = "django.contrib.gis.db.backends.postgis"
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replica_config["CONN_MAX_AGE"] = CONN_MAX_AGE
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DATABASES["replica"] = replica_config
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