old_contents: # Generated by Django 3.2.6 on 2021-09-09 12:58
  
  from django.db import migrations, models
  
  
  def set_is_gift_card_field(apps, schema_editor):
      OrderLine = apps.get_model("order", "OrderLine")
      for line in OrderLine.objects.iterator():
          line.is_gift_card = (
              line.variant and line.variant.product.product_type.kind == "gift_card"
          )
          line.save()
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ("order", "0118_auto_20210913_0731"),
          ("product", "0148_producttype_type"),
      ]
  
      operations = [
          migrations.AddField(
              model_name="orderline",
              name="is_gift_card",
              field=models.BooleanField(null=True),
          ),
          migrations.RunPython(set_is_gift_card_field, migrations.RunPython.noop),
          migrations.AlterField(
              model_name="orderline",
              name="is_gift_card",
              field=models.BooleanField(),
          ),
      ]
  
new_contents: # Generated by Django 3.2.6 on 2021-09-09 12:58
  
  from django.db import migrations, models
  
  
  def set_is_gift_card_field(apps, schema_editor):
      OrderLine = apps.get_model("order", "OrderLine")
      for line in OrderLine.objects.prefetch_related(
          "variant__product__product_type"
      ).iterator():
          line.is_gift_card = (
              bool(line.variant) and line.variant.product.product_type.kind == "gift_card"
          )
          line.save(update_fields=["is_gift_card"])
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ("order", "0118_auto_20210913_0731"),
          ("product", "0148_producttype_type"),
      ]
  
      operations = [
          migrations.AddField(
              model_name="orderline",
              name="is_gift_card",
              field=models.BooleanField(null=True),
          ),
          migrations.RunPython(set_is_gift_card_field, migrations.RunPython.noop),
          migrations.AlterField(
              model_name="orderline",
              name="is_gift_card",
              field=models.BooleanField(),
          ),
      ]
  
subject: Fix orderline is_gift_card mutation (#8150)