Error when connecting to an LTI tool in "Student View" mode

[bermudezjd]

Error is coming from middleware. Here's the trace:

Traceback:
File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response

1.             response = middleware_method(request)
   

   File "/django-auth-lti/django_auth_lti/middleware.py" in process_request

2.             user = auth.authenticate(request=request)
   

   File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/contrib/auth/init.py" in authenticate

3.         user = backend.authenticate(**credentials)
   

   File "/django-auth-lti/django_auth_lti/backends.py" in authenticate

4.             UserModel.USERNAME_FIELD: username,
   

   File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/manager.py" in get_or_create

5.     return self.get_queryset().get_or_create(**kwargs)
   

   File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/query.py" in get_or_create

6.                 six.reraise(*exc_info)
   

   File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/query.py" in get_or_create

7.                 obj.save(force_insert=True, using=self.db)
   

   File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/base.py" in save

8.                    force_update=force_update, update_fields=update_fields)
   

   File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/base.py" in save_base

9.         updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
   

   File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/base.py" in _save_table

10.         result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/base.py" in _do_insert

11.                            using=using, raw=raw)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/manager.py" in _insert

12.     return insert_query(self.model, objs, fields, **kwargs)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/query.py" in insert_query

13. return query.get_compiler(using=using).execute_sql(return_id)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql

14.         cursor.execute(sql, params)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/backends/util.py" in execute

15.         return super(CursorDebugWrapper, self).execute(sql, params)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/backends/util.py" in execute

16.             return self.cursor.execute(sql, params)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/utils.py" in exit

17.             six.reraise(dj_exc_type, dj_exc_value, traceback)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/backends/util.py" in execute

18.             return self.cursor.execute(sql, params)
    

    File "/home/vagrant/.virtualenvs/icommons_lti_tools/local/lib/python2.7/site-packages/django/db/backends/oracle/base.py" in execute

19.         return self.cursor.execute(query, self._param_generator(params))
    

Exception Type: DatabaseError at /lti_tools/wordpress/
Exception Value: ORA-12899: value too large for column "TERMTOOL"."AUTH_USER"."USERNAME" (actual: 40, maximum: 30)