'alembic current' crashes with stack trace

[Rob Schottland]

Suddenly, I can't get alembic (1.3.3?). alembic history does work, but my most recent migration crashes with an enormous stack-trace (as usual): here's my current pretty-simple migration script:

"""Citation datasource optional

Revision ID: f5a6e316ee8d

Revises: 2a181e783d96

Create Date: 2020-03-26 08:54:59.547135

"""

# revision identifiers, used by Alembic.

revision = 'f5a6e316ee8d'

down_revision = '2a181e783d96'

branch_labels = None

depends_on = None

from alembic import op

import sqlalchemy as sa

def upgrade():

    op.alter_column('citation', 'id_datasource',

                    existing_Type=sa.INTEGER(),

                    nullable=True)

    pass

def downgrade():

    op.alter_column('citation', 'id_datasource',

                    existing_Type=sa.INTEGER(),

                    nullable=False)

    pass

Here's the last  stanza  of the stack trace:

 File "/home/rschottland/.local/share/virtualenvs/astorb_db-u7fxujye/lib/python3.7/site-packages/sqlalchemy/sql/base.py", line 289, in _validate_dialect_kwargs

    "named <dialectname>_<argument>, got '%s'" % k

TypeError: Additional arguments should be named <dialectname>_<argument>, got 'index'

The whole 69 line stack trace is attached.

This is the 30th migration for this database going back to 2015. Nothing like this has occurred before. Could my alembic package be corrupted? The previous (successful) igration was only 3 days ago.

Any thoughts on this would be appreciated.

[Mike Bayer]

Somewhere in your model, likely inside of a Table() object, there is a keyword "index" being used which is invalid.   Look for that keyword and remove it.

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Attachments:

• alembic_stacktrace.txt