在django中将字段从一个模型复制到另一个模型的函数

source_instance = SourceModel.objects.first()
target_instance.field1 = source_instance.field1

class SourceModel(models.Model):
    field1 = models.CharField(max_length=100)
    field2 = models.IntegerField()

class TargetModel(models.Model):
    field1 = models.CharField(max_length=100)
    field2 = models.IntegerField()

def copy_fields_from_source_model():
    source_instance = SourceModel.objects.first()
    target_instance = TargetModel.objects.first()
    
    target_instance.field1 = source_instance.field1
    target_instance.field2 = source_instance.field2
    
    target_instance.save()