"""

Tests for the order_with_respect_to Meta attribute.

"""

from django.db import models

class Question(models.Model):

    text = models.CharField(max_length=200)

class Answer(models.Model):

    text = models.CharField(max_length=200)

    question = models.ForeignKey(Question, models.CASCADE)

    class Meta:

        order_with_respect_to = "question"

    def __str__(self):

        return self.text

class Post(models.Model):

    title = models.CharField(max_length=200)

    parent = models.ForeignKey(

        "self", models.SET_NULL, related_name="children", null=True

    )

    class Meta:

        order_with_respect_to = "parent"

    def __str__(self):

        return self.title

# order_with_respect_to points to a model with a OneToOneField primary key.

class Entity(models.Model):

    pass

class Dimension(models.Model):

    entity = models.OneToOneField("Entity", primary_key=True, on_delete=models.CASCADE)

class Component(models.Model):

    dimension = models.ForeignKey("Dimension", on_delete=models.CASCADE)

    class Meta:

        order_with_respect_to = "dimension"