websauna admin does not detect audiostream table

models.py

"""Place your SQLAlchemy models in this file."""

import datetime
from uuid import uuid4

from sqlalchemy import Column, Unicode, String, Integer, ForeignKey, UnicodeText
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import relationship

from websauna.system.model.meta import Base
from websauna.system.model.columns import UTCDateTime
from websauna.utils.time import now

class Media(Base):

    #: The table in the database
    __tablename__ = "media"

    #: Database primary key for the row (running counter)
    id = Column(Integer, autoincrement=True, primary_key=True)

    #: Publicly exposed non-guessable
    uuid = Column(UUID(as_uuid=True), default=uuid4)

    #: url
    url = Column(Unicode(384), default=None)

    #: title of content
    title = Column(Unicode(384), default=None)

    #: duration of content
    duration = Column(String(8), default=None)
    
    #: description of content
    description = Column(UnicodeText, default=None)

    #: When this content was published
    published_at = Column(UTCDateTime, default=None)

    #: Relationship mapping between media and audiostream.
    #: Each audiostream can have only media.
    #: Deleting media deletes its audiostreams.
    audiostreams = relationship("AudioStream",
                           back_populates="media",
                           lazy="dynamic",
                           cascade="all, delete-orphan",
                           single_parent=True)

    def is_recent(self):
        return self.published_at >= now() - datetime.timedelta(days=1)

    def __repr__(self):
        return "#{}: {}".format(self.id, self.url)

    def __str__(self):
        """Python default and admin UI string presentation."""
        return self.url


class AudioStream(Base):

    #: The table in the database
    __tablename__ = "audiostream"

    #: Database primary key for the row (running counter)
    id = Column(Integer, autoincrement=True, primary_key=True)

    #: Publicly exposed non-guessable id
    uuid = Column(UUID(as_uuid=True), default=uuid4)

    #: What the user sees for this audiostream
    filepath = Column(Unicode(512), default=None)
    bitrate = Column(String(4), default=None)
    extension = Column(String(4), default=None)
    
    #: download url
#     url = Column(Unicode(768), default=None)

    #: Which question this choice is part of
    media_id = Column(Integer, ForeignKey('media.id'))
    media = relationship("Media", back_populates="audiostreams")

    def __repr__(self):
        """Shell and debugger presentation."""
        return "#{}@{}".format(self.extension, self.bitrate)

    def __str__(self):
        """Python default and admin UI string presentation."""
        return "#{}@{}".format(self.extension, self.bitrate)
        
        
        

(websauna_env)~/webapp/websauna_env/hearit (master ✘)✖✹✭ ᐅ ws-alembic -c hearit/conf/development.ini -x packages=all revision --auto -m "Initial migration"
configure_tasks
tasks scan!
configure_models
[22:24:31] [websauna.system.core.redis create_redis] Creating a new Redis connection pool. Process 7374, thread MainThread, max_connections 16
[22:24:31] [websauna.system.devop.alembic parse_allowed_packages] Considering migrations for models in Python packages ['all']
[22:24:31] [websauna.system.devop.alembic run_alembic] Starting online migration engine on database connection Engine(postgresql://hearit:***@localhost:5432/hearit_dev) version history table alembic_history_hearit
[22:24:31] [alembic.runtime.migration __init__] Context impl PostgresqlImpl.
[22:24:31] [alembic.runtime.migration __init__] Will assume transactional DDL.
[22:24:31] [alembic.autogenerate.compare _compare_tables] Detected added table 'group'
[22:24:31] [alembic.autogenerate.compare _compare_tables] Detected added table 'media'
[22:24:31] [alembic.autogenerate.compare _compare_tables] Detected added table 'user_activation'
[22:24:31] [alembic.autogenerate.compare _compare_tables] Detected added table 'audiostream'
[22:24:31] [alembic.autogenerate.compare _compare_tables] Detected added table 'users'
[22:24:31] [alembic.autogenerate.compare _compare_tables] Detected added table 'usergroup'
[22:24:31] [websauna.system.devop.alembic run_alembic] All done
  Generating /Users/maz/webapp/websauna_env/hearit/alembic/versions/545fcfcd2e65_initial_migration.py ... done
(websauna_env)~/webapp/websauna_env/hearit (master ✘)✖✹✭ ᐅ ws-alembic -c hearit/conf/development.ini -x packages=all upgrade head                          
configure_tasks
tasks scan!
configure_models
[22:24:56] [websauna.system.core.redis create_redis] Creating a new Redis connection pool. Process 7433, thread MainThread, max_connections 16
[22:24:56] [websauna.system.devop.alembic parse_allowed_packages] Considering migrations for models in Python packages ['all']
[22:24:56] [websauna.system.devop.alembic run_alembic] Starting online migration engine on database connection Engine(postgresql://hearit:***@localhost:5432/hearit_dev) version history table alembic_history_hearit
[22:24:56] [alembic.runtime.migration __init__] Context impl PostgresqlImpl.
[22:24:56] [alembic.runtime.migration __init__] Will assume transactional DDL.
[22:24:56] [alembic.runtime.migration run_migrations] Running upgrade  -> 545fcfcd2e65, Initial migration
[22:24:56] [alembic.runtime.migration update_to_step] new branch insert 545fcfcd2e65
[22:24:56] [websauna.system.devop.alembic run_alembic] All done