Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/courses/teacher/classroom/

Django Version: 2.0.1
Python Version: 3.6.2
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'courses']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\backends\mysql\base.py" in execute
  71.             return self.cursor.execute(query, args)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\MySQLdb\cursors.py" in execute
  250.             self.errorhandler(self, exc, value)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\MySQLdb\connections.py" in defaulterrorhandler
  50.         raise errorvalue

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\MySQLdb\cursors.py" in execute
  247.             res = self._query(query)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\MySQLdb\cursors.py" in _query
  411.         rowcount = self._do_query(q)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\MySQLdb\cursors.py" in _do_query
  374.         db.query(q)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\MySQLdb\connections.py" in query
  292.             _mysql.connection.query(self, query)

During handling of the above exception ((1048, "Column 'lecture_id' cannot be null")), another exception occurred:

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\core\handlers\exception.py" in inner
  35.             response = get_response(request)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\core\handlers\base.py" in _get_response
  128.                 response = self.process_exception_by_middleware(e, request)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\core\handlers\base.py" in _get_response
  126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\eve\courses\views.py" in classroom
  97.             form2.save()

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\forms\models.py" in save
  456.             self.instance.save()

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\models\base.py" in save
  729.                        force_update=force_update, update_fields=update_fields)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\models\base.py" in save_base
  759.             updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\models\base.py" in _save_table
  842.             result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\models\base.py" in _do_insert
  880.                                using=using, raw=raw)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\models\manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\models\query.py" in _insert
  1125.         return query.get_compiler(using=using).execute_sql(return_id)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
  1281.                 cursor.execute(sql, params)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\backends\utils.py" in execute
  100.             return super().execute(sql, params)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\backends\utils.py" in execute
  68.         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\backends\utils.py" in _execute_with_wrappers
  77.         return executor(sql, params, many, context)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\backends\utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "C:\Users\danny\Desktop\Projects\bachelor_thesis\lib\site-packages\django\db\backends\mysql\base.py" in execute
  76.                 raise utils.IntegrityError(*tuple(e.args))

Exception Type: IntegrityError at /courses/teacher/classroom/
Exception Value: (1048, "Column 'lecture_id' cannot be null")