text: # Generated by Django 3.1 on 2020-08-12 12:11
  
  from django.db import migrations, models
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      initial = True
  
      dependencies = [
          ('challenge', '0001_initial'),
          ('announcement', '0001_initial'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='announcement',
              name='challenge',
              field=models.ForeignKey(blank=True, help_text='为空则为一般公告', null=True, on_delete=django.db.models.deletion.CASCADE, to='challenge.challenge'),
          ),
      ]
  