StopAsyncIteration Exception

Hello, when I execute the following example I get an StopAsyncIteration Exception with no Exception Message.

from pydbantic import Database

class Department(DataBaseModel):
    id: str = PrimaryKey()
    name: str
    company: str
    is_sensitive: bool = False

db = await Database.create('sqlite:///test.db',tables=[Department])

Traceback:

StopAsyncIteration                        Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_19192/144563389.py in <module>
      7     is_sensitive: bool = False
      8 
----> 9 db = await Database.create('sqlite:///test.db',tables=[Department])

~\Documents\.venv\lib\site-packages\pydbantic\database.py in create(cls, DB_URL, tables, cache_enabled, redis_url, logger, debug, testing)
    492 
    493         async with new_db:
--> 494             await new_db.compare_tables_and_migrate()
    495 
    496         return new_db

~\Documents\.venv\lib\site-packages\pydbantic\database.py in compare_tables_and_migrate(self)
    161 
    162         # checkout database for migrations
--> 163         database_init = await DatabaseInit.get(database_url=self.DB_URL)
    164 
    165         if not database_init:

~\Documents\.venv\lib\site-packages\pydbantic\core.py in get(cls, **p_key)
    626             if k != cls.__metadata__.tables[cls.__name__]['primary_key']:
    627                 raise f"Expected primary key {primary_key}=<value>"
--> 628         result = await cls.select('*', where={**p_key})
    629         return result[0] if result else None
    630 

~\Documents\.venv\lib\site-packages\pydbantic\core.py in select(cls, where, alias, limit, offset, *selection)
    431         database = cls.__metadata__.database
    432 
--> 433         results = await database.fetch(sel, cls.__name__, values)
    434 
    435         for result in cls.normalize(results):

~\Documents\.venv\lib\site-packages\pydbantic\database.py in fetch(self, query, table_name, values)
    459         self.log.debug(f"running query: {query} with {values}")
    460 
--> 461         async with self as conn:
    462             row = await conn.fetch_all(query=query)
    463 

~\Documents\.venv\lib\site-packages\pydbantic\database.py in __aenter__(self)
    509                 continue
    510             self.connection_map[conn_id]['last'] = time.time()
--> 511             return await self.connection_map[conn_id]['conn'].asend(None)
    512 
    513         conn_id = str(uuid.uuid4())

StopAsyncIteration: 

Versions

• Python version 3.9.6
• Pydbantic version 0.0.15
• Operating system Windows 10

[Phil997]

Ah ok, thanks for your time.

[codemation]

That is normal, whenever db.create() is called, a lock is placed on the DB for migrations, so no other connected applications try to migrate a DB simultaneously. The message indicates the DB init ( migration and table setup) has completed.