feat: taskfile + poetry based db init REF #24

this is a long standing feature request where you are able to use a taskfile endpoint
to initialise the database. sqlalchemy uses asyncio, the following makes available
a  method in the  package which is a asyncio wrapper for the sqlalchemy
metadata create and rop methods.

you can use 2023-03-06 03:42:45,317 INFO sqlalchemy.engine.Engine select pg_catalog.version()
2023-03-06 03:42:45,317 INFO sqlalchemy.engine.Engine [raw sql] ()
2023-03-06 03:42:45,318 INFO sqlalchemy.engine.Engine select current_schema()
2023-03-06 03:42:45,318 INFO sqlalchemy.engine.Engine [raw sql] ()
2023-03-06 03:42:45,319 INFO sqlalchemy.engine.Engine show standard_conforming_strings
2023-03-06 03:42:45,319 INFO sqlalchemy.engine.Engine [raw sql] ()
2023-03-06 03:42:45,319 INFO sqlalchemy.engine.Engine BEGIN (implicit)
2023-03-06 03:42:45,320 INFO sqlalchemy.engine.Engine COMMIT to invoke this routine, which in turn uses a poetry script
to run the method provided by the package.

note that this has hard coded references to the labs package which will have to be
cleaned by the eject script in #55

poetry is run in the container which should have the configuration variables required
for the database environment

Author: devraj

Diff for: Taskfile.yml

@@ -36,7 +36,7 @@ tasks:
   db:init:
     desc: initialise the database schema
     cmds:
-      - docker compose exec api sh -c "poetry run init_db"
+      - docker compose exec api sh -c "poetry run initdb"
   db:rev:
     desc: create a database migration, pass a string as commit string
     cmds:

Diff for: src/labs/db.py

@@ -47,6 +47,15 @@ async def init_models():
         await conn.run_sync(Base.metadata.drop_all)
         await conn.run_sync(Base.metadata.create_all)
 
+
+def initalise():
+    """ Async IO containers to run the init_models function
+
+    This is called from the command line via poetry
+    """
+    import asyncio
+    asyncio.run(init_models())
+
 # TODO: Revise implementation in async context
 # Donot use until we have a better understanding of how to use async context
 # @asynccontextmanager

Diff for: src/pyproject.toml

@@ -41,7 +41,7 @@ httpx = "^0.23.3"
 watchdog = "^2.1.8"
 
 [tool.poetry.scripts]
-init-db = "labs.db:main"
+initdb = "labs.db:initalise"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.1.3"