import django.db.models.deletion from django.db import migrations, models class Migration(migrations.Migration): dependencies = [ ('materials', '0005_material_seed_type'), ('plans', '0007_ricetransplantplan_seedling_boxes_per_tan'), ] operations = [ migrations.AddField( model_name='variety', name='seed_material', field=models.ForeignKey( blank=True, limit_choices_to={'material_type': 'seed'}, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='varieties', to='materials.material', verbose_name='種子在庫資材', ), ), ]