Intial Server run is throwing TypeError: cannot unpack non-iterable EnumChoices object

1. Just pulled a repo & installed requirements.txt in virtualenv
2. gettting below error when I’m starting the app

### The Error:

Traceback (most recent call last): File "/Users/tusharniras/Desktop/sanbox/flask-admin/examples/sqla/run_server.py", line 1, in <module> from admin import app File "/Users/tusharniras/Desktop/sanbox/flask-admin/examples/sqla/admin/__init__.py", line 24, in <module> import admin.main File "/Users/tusharniras/Desktop/sanbox/flask-admin/examples/sqla/admin/main.py", line 248, in <module> admin.add_view(UserAdmin(User, db.session)) File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/contrib/sqla/view.py", line 327, in __init__ super(ModelView, self).__init__(model, name, category, endpoint, url, static_folder, File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/model/base.py", line 818, in __init__ self._refresh_cache() File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/model/base.py", line 910, in _refresh_cache self._refresh_forms_cache() File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/model/base.py", line 835, in _refresh_forms_cache self._create_form_class = self.get_create_form() File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/model/base.py", line 1291, in get_create_form return self.get_form() File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/model/base.py", line 1248, in get_form return self.scaffold_form() File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/contrib/sqla/view.py", line 745, in scaffold_form form_class = form.get_form(self.model, converter, File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py", line 552, in get_form field = converter.convert(model, mapper, name, prop, field_args.get(name), hidden_pk) File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py", line 263, in convert return converter(model=model, mapper=mapper, prop=prop, File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py", line 307, in convert_choice_type accepted_values = [key for key, val in available_choices] File "/Users/tusharniras/Desktop/sanbox/flask-admin/venv/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py", line 307, in <listcomp> accepted_values = [key for key, val in available_choices] TypeError: cannot unpack non-iterable EnumChoices object

[mihemihe]

Same error here after tried two times from scratch. To reproduce the issue:

virtualenv env -p python3 source env/bin/activate pip install -r examples/sqla/requirements.txt python3 examples/sqla/run_server.py

Traceback (most recent call last): File “/home/mihe/fa/flask-admin/examples/sqla/run_server.py”, line 1, in <module> from admin import app File “/home/mihe/fa/flask-admin/examples/sqla/admin/init.py”, line 24, in <module> import admin.main File “/home/mihe/fa/flask-admin/examples/sqla/admin/main.py”, line 248, in <module> admin.add_view(UserAdmin(User, db.session)) File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/contrib/sqla/view.py”, line 327, in init super(ModelView, self).init(model, name, category, endpoint, url, static_folder, File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/model/base.py”, line 818, in init self._refresh_cache() File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/model/base.py”, line 910, in _refresh_cache self._refresh_forms_cache() File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/model/base.py”, line 835, in _refresh_forms_cache self._create_form_class = self.get_create_form() File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/model/base.py”, line 1291, in get_create_form return self.get_form() File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/model/base.py”, line 1248, in get_form return self.scaffold_form() File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/contrib/sqla/view.py”, line 745, in scaffold_form form_class = form.get_form(self.model, converter, File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py”, line 552, in get_form field = converter.convert(model, mapper, name, prop, field_args.get(name), hidden_pk) File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py”, line 263, in convert return converter(model=model, mapper=mapper, prop=prop, File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py”, line 307, in convert_choice_type accepted_values = [key for key, val in available_choices] File “/home/mihe/fa/flask-admin/env/lib/python3.9/site-packages/flask_admin/contrib/sqla/form.py”, line 307, in <listcomp> accepted_values = [key for key, val in available_choices] TypeError: cannot unpack non-iterable EnumChoices object

[Ma27]

It seems as the issue gets fixed by downgrading SQLAlchemy-Utils to 0.36.