Zystkmt

My views.py and models.py are as below:

views.py:

import calendar

from flask_appbuilder import ModelView

from flask_appbuilder.models.sqla.interface import SQLAInterface

from flask_appbuilder.charts.views import GroupByChartView

from flask_appbuilder.models.group import aggregate_count

from flask_appbuilder.widgets import FormHorizontalWidget, FormInlineWidget, FormVerticalWidget

from flask_babel import lazy_gettext as _



from app import db, appbuilder

from .models import DB, Table



class tableModelView(ModelView):

    datamodel = SQLAInterface(Table)

    list_columns = ['table_group.table_db_name', 'table_name', 'ddl']

    base_order = ['table_group.table_db_name', 'asc']

    show_fieldsets = [

            ('Summary', {'fields' : list_columns})

        ]

    add_fieldsets = [

            ('Summary', {'fields' : list_columns})

        ]

    edit_fieldsets = [

            ('Summary', {'fields' : list_columns})

        ]



class GroupModelView(ModelView):

    datamodel = SQLAInterface(DB)

    related_views = [tableModelView]





db.create_all()

appbuilder.add_view(GroupModelView, "List DBs",

                    icon="fa-folder-open-o", category="DB", category_icon='fa-envelope')

appbuilder.add_separator("Table")

appbuilder.add_view(tableModelView, "List Tables",

                    icon="fa-folder-open-o", category="Table", category_icon='fa-envelope')

models.py:

import datetime

from sqlalchemy import Column, Integer, String, ForeignKey, Date

from sqlalchemy.orm import relationship

from flask_appbuilder import Model



mindate = datetime.date(datetime.MINYEAR, 1, 1)



class DB(Model):

    db_name = Column(String(50), unique=True, primary_key=True, nullable=False)



    def __repr__(self):

        return self.name



class Table(Model):

    table_name = Column(String(100), primary_key=True)

    ddl = Column(String(16384), unique=True)



    table_db_name = Column(Integer, ForeignKey(DB.db_name), nullable=False)

    table_group = relationship("DB")



    def __repr__(self):

        return self.name

However, when I run it, it has this error:

Traceback (most recent call last):

  File "run.py", line 1, in <module>

    from app import app

  File "/Users/x0m00jk/Platform-Manager/app/__init__.py", line 28, in <module>

    from app import models, views

  File "/Users/x0m00jk/Platform-Manager/app/views.py", line 56, in <module>

    icon="fa-folder-open-o", category="DB", category_icon='fa-envelope')

  File "/usr/local/lib/python2.7/site-packages/flask_appbuilder/base.py", line 351, in add_view

    baseview = self._check_and_init(baseview)

  File "/usr/local/lib/python2.7/site-packages/flask_appbuilder/base.py", line 303, in _check_and_init

    baseview = baseview()

  File "/usr/local/lib/python2.7/site-packages/flask_appbuilder/views.py", line 451, in __init__

    super(ModelView, self).__init__(**kwargs)

  File "/usr/local/lib/python2.7/site-packages/flask_appbuilder/baseviews.py", line 631, in __init__

    super(BaseCRUDView, self).__init__(**kwargs)

  File "/usr/local/lib/python2.7/site-packages/flask_appbuilder/baseviews.py", line 398, in __init__

    self._init_properties()

  File "/usr/local/lib/python2.7/site-packages/flask_appbuilder/baseviews.py", line 696, in _init_properties

    self.list_columns = self.list_columns or [list_cols[0]]

IndexError: list index out of range