Created
October 7, 2016 22:13
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Ответ на тестовое задание https://gist.github.com/dmitry-mukhin/fbc28d3b75605d4dd528
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# coding: utf-8 | |
# Ответ на https://gist.github.com/dmitry-mukhin/fbc28d3b75605d4dd528 | |
from collections import defaultdict | |
from django.db import models | |
class Item(models.Model): | |
# ..... | |
def get_options_new(self): | |
''' | |
Суть оригинального метода сводится к получению | |
списка опций, сгруппированных по темам, | |
причем если ItemOption.item не равно текущему value | |
берется как None | |
''' | |
qs = ItemOption.objects.select_related('option', 'option__topic') | |
topics = defaultdict(set) | |
for item_option in qs: | |
value = ( | |
item_option.value | |
if item_option.item_id == self.pk else None | |
) | |
topics[item_option.option.topic.name].add( | |
(item_option.option.title, value, ) | |
) | |
result = [] | |
for topic, options in topics.iteritems(): | |
result.append(dict( | |
name=topic, | |
options=[{'title': i[0], 'value': i[1]} for i in options] | |
)) | |
return result | |
class Topic(models.Model): | |
name = models.CharField(max_length=255) | |
class Option(models.Model): | |
topic = models.ForeignKey(Topic) | |
title = models.CharField(max_length=255) | |
class ItemOption(models.Model): | |
item = models.ForeignKey(Item) | |
option = models.ForeignKey(Option) | |
value = models.CharField(max_length=20) |
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