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107 lines
3.7 KiB
Python
107 lines
3.7 KiB
Python
from __future__ import unicode_literals
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from operator import attrgetter
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from django.test import TestCase
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from django.db import models
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from .models import Post, Question, Answer
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class OrderWithRespectToTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.q1 = Question.objects.create(text="Which Beatle starts with the letter 'R'?")
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Answer.objects.create(text="John", question=cls.q1)
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Answer.objects.create(text="Paul", question=cls.q1)
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Answer.objects.create(text="George", question=cls.q1)
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Answer.objects.create(text="Ringo", question=cls.q1)
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def test_default_to_insertion_order(self):
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# Answers will always be ordered in the order they were inserted.
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self.assertQuerysetEqual(
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self.q1.answer_set.all(), [
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"John", "Paul", "George", "Ringo",
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],
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attrgetter("text"),
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)
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def test_previous_and_next_in_order(self):
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# We can retrieve the answers related to a particular object, in the
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# order they were created, once we have a particular object.
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a1 = Answer.objects.filter(question=self.q1)[0]
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self.assertEqual(a1.text, "John")
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self.assertEqual(a1.get_next_in_order().text, "Paul")
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a2 = list(Answer.objects.filter(question=self.q1))[-1]
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self.assertEqual(a2.text, "Ringo")
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self.assertEqual(a2.get_previous_in_order().text, "George")
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def test_item_ordering(self):
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# We can retrieve the ordering of the queryset from a particular item.
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a1 = Answer.objects.filter(question=self.q1)[1]
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id_list = [o.pk for o in self.q1.answer_set.all()]
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self.assertEqual(a1.question.get_answer_order(), id_list)
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# It doesn't matter which answer we use to check the order, it will
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# always be the same.
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a2 = Answer.objects.create(text="Number five", question=self.q1)
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self.assertEqual(
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a1.question.get_answer_order(), a2.question.get_answer_order()
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)
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def test_change_ordering(self):
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# The ordering can be altered
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a = Answer.objects.create(text="Number five", question=self.q1)
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# Swap the last two items in the order list
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id_list = [o.pk for o in self.q1.answer_set.all()]
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x = id_list.pop()
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id_list.insert(-1, x)
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# By default, the ordering is different from the swapped version
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self.assertNotEqual(a.question.get_answer_order(), id_list)
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# Change the ordering to the swapped version -
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# this changes the ordering of the queryset.
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a.question.set_answer_order(id_list)
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self.assertQuerysetEqual(
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self.q1.answer_set.all(), [
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"John", "Paul", "George", "Number five", "Ringo"
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],
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attrgetter("text")
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)
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class OrderWithRespectToTests2(TestCase):
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def test_recursive_ordering(self):
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p1 = Post.objects.create(title='1')
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p2 = Post.objects.create(title='2')
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p1_1 = Post.objects.create(title="1.1", parent=p1)
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p1_2 = Post.objects.create(title="1.2", parent=p1)
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Post.objects.create(title="2.1", parent=p2)
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p1_3 = Post.objects.create(title="1.3", parent=p1)
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self.assertEqual(p1.get_post_order(), [p1_1.pk, p1_2.pk, p1_3.pk])
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def test_duplicate_order_field(self):
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class Bar(models.Model):
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pass
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class Foo(models.Model):
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bar = models.ForeignKey(Bar)
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order = models.OrderWrt()
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class Meta:
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order_with_respect_to = 'bar'
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count = 0
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for field in Foo._meta.local_fields:
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if isinstance(field, models.OrderWrt):
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count += 1
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self.assertEqual(count, 1)
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