new_contents: # Generated by Django 2.0.7 on 2018-07-11 07:51
  
  from django.conf import settings
  from django.db import migrations, models
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          migrations.swappable_dependency(settings.AUTH_USER_MODEL),
          ('problem', '0006_auto_20180703_1701'),
      ]
  
      operations = [
          migrations.CreateModel(
              name='ProblemQuestion',
              fields=[
                  ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                  ('question', models.TextField()),
                  ('answer', models.TextField(blank=True)),
                  ('datetime', models.DateTimeField(auto_now_add=True)),
                  ('problem_instance', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='problem.ProblemInstance')),
                  ('user', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL)),
              ],
              options={
                  'verbose_name': '문제 Q&A',
                  'verbose_name_plural': '문제 Q&A들',
              },
          ),
          migrations.AlterField(
              model_name='problemauthlog',
              name='datetime',
              field=models.DateTimeField(auto_now_add=True),
          ),
      ]
  
subject: Add migration files for ProblemQuestion