'PGDDLCompiler' object has no attribute '_bind_processors'

My envs

- Python 3.6.3
- asyncpgsa==0.18.1
- asyncpg==0.12.0
- sqlalchemy==1.1.15

My code sample

from asyncpgsa import PG
from app import app

DB_CONFIG = {
    'host': '172.17.0.3',
    'port': 5432,
    'database': '***',
    'user': 'xtpids',
    'password': '***',
    'min_size': 5,
    'max_size': 10,
}

@app.listener('before_server_start')
async def init_db(*args, **kwargs):
    # Initializing a db singleton before server start
    pg = PG()
    await pg.init(**DB_CONFIG)
    app.db = pg
    return app.db

# Create tables in some script
tables = Base.metadata.tables
for name, table in tables.items():
    create_expr = CreateTable(table)
    await app.db.execute(create_expr)

The exception

… File “/home/wonder/PyEnvs/xtpids-BKbQCeJj/lib/python3.6/site-packages/asyncpgsa/pgsingleton.py”, line 82, in execute return await conn.execute(*args, **kwargs) File “/home/wonder/PyEnvs/xtpids-BKbQCeJj/lib/python3.6/site-packages/asyncpgsa/connection.py”, line 105, in execute script, params = compile_query(script, dialect=self._dialect) File “/home/wonder/PyEnvs/xtpids-BKbQCeJj/lib/python3.6/site-packages/asyncpgsa/connection.py”, line 83, in compile_query params = _get_keys(compiled) File “/home/wonder/PyEnvs/xtpids-BKbQCeJj/lib/python3.6/site-packages/asyncpgsa/connection.py”, line 43, in _get_keys processors = compiled._bind_processors AttributeError: ‘PGDDLCompiler’ object has no attribute ‘_bind_processors’

My analysis

In sqlalchemy’s source, only SQLCompiler has _bind_processors property. However create_expr.compile(dialect=asyncpgsa.connection._dialect) generates an instance of type PGDDLCompiler(DDLCompiler), of which SQLCompiler isn’t a base class.

[nhumrich]

You could try changing the dialect to psycopg dialect (slqalchemys default) and see if that helps: create_pool(dialect=sa.dialects.postgresql.psycopg2)

http://docs.sqlalchemy.org/en/latest/dialects/postgresql.html#module-sqlalchemy.dialects.postgresql.psycopg2

[nhumrich]

This might be fixed now thanks to #94