flask db migrate error

Hi,

As this is my first post I'd like to thank you for your work on this
project.
Originally I posted this following question to pgsql-gui-dev and was
advised to repost here.

I have a question regarding modifying configuration db model for pgadmin4:
When trying to create a new migration file I get an error:
sqlalchemy.exc.NoSuchTableError: user_old

The command used: FLASK_APP=pgAdmin4.py flask db migrate -m "Add data
groups"
The db is initialized with: python setup.py, I also tried:
FLASK_APP=pgAdmin4.py flask db init

When commenting out (just for tests) content of
"web/migrations/versions/35f29b1701bd_.py" I get a similar error but with
"server_old".
So my question is what is the correct procedure to modify configuration db
or how to solve the mentioned issue?

Thanks in advance,

DETAILS:

* pgadmin4 version: cloned from master with latest commit on Jan 13, 2020

* Changes in "model/__init__.py":
SCHEMA_VERSION = 25
...
class DataGroup(db.Model):
"""Define a data group for the treeview"""
__tablename__ = 'datagroup'
id = db.Column(db.Integer, primary_key=True)
user_id = db.Column(db.Integer, db.ForeignKey('user.id'),
nullable=False)

name = db.Column(db.String(128), nullable=False)
__table_args__ = (db.UniqueConstraint('user_id', 'name'),)

* migrate command exception details:
...
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/util/compat.py",
line 173, in load_module_py
spec.loader.exec_module(module)
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in
_call_with_frames_removed
File "migrations/env.py", line 94, in <module>
run_migrations_online()
File "migrations/env.py", line 87, in run_migrations_online
context.run_migrations()
File "<string>", line 8, in run_migrations
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/runtime/environment.py",
line 846, in run_migrations
self.get_context().run_migrations(**kw)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/runtime/migration.py",
line 507, in run_migrations
for step in self._migrations_fn(heads, self):
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/command.py",
line 190, in retrieve_migrations
revision_context.run_autogenerate(rev, context)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/autogenerate/api.py",
line 442, in run_autogenerate
self._run_environment(rev, migration_context, True)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/autogenerate/api.py",
line 482, in _run_environment
autogen_context, migration_script
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/autogenerate/compare.py",
line 25, in _populate_migration_script
_produce_net_changes(autogen_context, upgrade_ops)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/autogenerate/compare.py",
line 51, in _produce_net_changes
autogen_context, upgrade_ops, schemas
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/util/langhelpers.py",
line 303, in go
fn(*arg, **kw)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/autogenerate/compare.py",
line 83, in _autogen_for_tables
autogen_context,
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/alembic/autogenerate/compare.py",
line 195, in _compare_tables
inspector.reflecttable(t, None)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/engine/reflection.py",
line 669, in reflecttable
reflection_options,
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/engine/reflection.py",
line 848, in _reflect_fk
**reflection_options
File "<string>", line 2, in __new__
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/util/deprecations.py",
line 128, in warned
return fn(*args, **kwargs)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/sql/schema.py",
line 506, in __new__
metadata._remove_table(name, schema)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/util/langhelpers.py",
line 68, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/util/compat.py",
line 153, in reraise
raise value
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/sql/schema.py",
line 501, in __new__
table._init(name, metadata, *args, **kw)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/sql/schema.py",
line 595, in _init
resolve_fks=resolve_fks,
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/sql/schema.py",
line 619, in _autoload
_extend_on=_extend_on,
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/engine/base.py",
line 1615, in run_callable
return callable_(self, *args, **kwargs)
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/engine/default.py",
line 460, in reflecttable
table, include_columns, exclude_columns, resolve_fks, **opts
File
"/home/rga/.virtualenvs/pgadmin4/lib/python3.7/site-packages/sqlalchemy/engine/reflection.py",
line 655, in reflecttable
raise exc.NoSuchTableError(table.name)
sqlalchemy.exc.NoSuchTableError: user_old

--
Best Regards,

Radoslaw Garbacz
XtremeData Incorporated