models.py
class ModelA(models.Model):
name = models.CharField(max_length=40)
class ModelB(models.Model):
name = models.CharField(max_length=100)
model_c = GenericRelation("modelc")
class ModelC(models.Model):
model_a = models.ForeignKey(ModelA, on_delete=models.CASCADE)
content_type = models.ForeignKey(ContentType,
limit_choices_to={"model__in":["modelb", "modelx", "modely"]},
on_delete=models.CASCADE)
object_id = models.PositiveIntegerField()
details = GenericForeignKey("content_type","object_id")
admin.py
class AdminModelB(admin.ModelAdmin):
list_display = ("name", "model_a")
@staticmethod
def model_a(obj):
return obj.model_c.model_a # 'GenericRelatedObjectManager' object has no attribute 'model_a'
I have ModelB having GenericRelation in field model_c where ModelC contain ContentType as ForeignKey. Now I want to display ModelA.name in list_display of ModelB. I have tried like other foreignkey fields but it gives me an error 'GenericRelatedObjectManager' object has no attribute 'model_a'.
