Flask-Admin sqlalchemy.exc.ProgrammingError无法打印的ProgrammingError对象

如何解决Flask-Admin sqlalchemy.exc.ProgrammingError无法打印的ProgrammingError对象

我用flask项目开发我的应用程序，并与Flask-Admin合作。 当尝试使用“ QuerySelectField”时，出现了sqlalchemy.exc.ProgrammingError错误： sqlalchemy.exc.ProgrammingError：

from wtforms.ext.sqlalchemy.fields import QuerySelectField
from flask_admin.contrib.sqla import ModelView

class Collegue(ModelView):
    ....

    form_extra_fields ={
      ...
      # I've got error when this is abled
      "member_id": QuerySelectField(_('Member'),query_factory=lambda: Member.query.all(),get_label='name',get_pk=lambda x: x.id),..
    }

    ####
    # Help into or outside create_view()
    ####
    @expose('/new',method=('GET','POST'))
    def create_view(self):
      """
        What can i'll do here or outside to fix
        sqlalchemy.exc.ProgrammingError: <unprintable ProgrammingError object> ???
      """
      pass

谢谢