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POoverwritten save method endless loop?
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copied!<p>the class:</p> <pre><code>class Operation(models.Model): related_operation = models.ForeignKey('self', null = True) __related_operation = None def __init__(self, *args, **kwargs): super(Operation, self).__init__(*args, **kwargs) self.__related_operation = self.related_operation def save(self, force_insert=False, force_update=False): if self.related_operation != self.__related_operation: del self.__related_operation super(Operation, self).save(force_insert, force_update) self.__related_operation = self.related_operation </code></pre> <p>the code:</p> <pre><code> (...) OperationFormSet = modelformset_factory(Operation, form=OperationCategoryOnlyForm) if request.method == "POST": formset = OperationFormSet(request.POST, queryset=Operation.objects.filter(category=category_id)) if formset.is_valid(): instances = formset.save(commit = False) for instance in instances: if instance.related_account is not None: related_operation = Operation() related_operation.related_operation = instance related_operation.save() instance.related_operation = related_operation instance.save() formset = OperationFormSet(queryset=Operation.objects.filter(category=category_id)) else: formset = OperationFormSet(queryset=Operation.objects.filter(category=category_id)) </code></pre> <p>and the problem:</p> <p>without the overwriting the method save everything works properly, but if i change related_operation in form, it of course makes second, third and so on related operation.</p> <p>so i decided to overwrite the save method - and add the __related_operation. During saving it checks if related_operation changes - if so - it should delete the old related_operation and than save (with creating a completely new one related_operation)... And it almost works! (the new related_operation is added to database, but it loops after save. It never ends. I don't know what it is doing. I have to restart apache to get any answer from server. Maybe it's stupid mistyping or something very complex - i'm stacked...</p> <p>(of course the operation class has more than one field e.g. related_account, so the if instance.related_account is not None: is correct)</p> <p><strong>UPDATE:</strong></p> <p>I found, that the problem is here:</p> <pre><code>def __init__(self, *args, **kwargs): super(Operation, self).__init__(*args, **kwargs) #self.__related_operation = self.related_operation </code></pre> <p>If i comment out the line above - everything goes ok - but of course it is wrong - why it blocks sth.</p>

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