40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
"""
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extensions.py
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=============
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Shared Flask extension instances (SQLAlchemy db + AppLogger).
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All Blueprints import from here to avoid circular imports.
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Initialization order (enforced in app.py):
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1. db = SQLAlchemy() -- created here at module level
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2. app.py configures Flask app
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3. db.init_app(app) -- called in app.py
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4. set_db(db) -- unpacks model classes
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5. init_logger(app, db) -- binds logger_handler here
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6. Blueprints are registered
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"""
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from flask_sqlalchemy import SQLAlchemy
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from logger_handler import AppLogger
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# ---------------------------------------------------------------------------
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# Database — single shared instance
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# ---------------------------------------------------------------------------
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db = SQLAlchemy()
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# ---------------------------------------------------------------------------
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# Application-level logger — initialized via init_logger() below
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# ---------------------------------------------------------------------------
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logger_handler: "AppLogger | None" = None
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def init_logger(app, database) -> AppLogger:
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"""
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Instantiate AppLogger and bind it to the module-level ``logger_handler``
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variable so every Blueprint that does ``from extensions import logger_handler``
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receives the same fully-initialized instance.
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"""
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global logger_handler
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logger_handler = AppLogger(app, database)
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return logger_handler
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