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250 lines
7.8 KiB
250 lines
7.8 KiB
import arrow
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from uuid import uuid4
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from django.db import models
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from django.core.exceptions import ValidationError
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from django.utils import timezone
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from django.utils.text import slugify
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from django.utils.timezone import now
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from django.contrib.auth import get_user_model
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from django.urls import reverse_lazy
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from polymorphic_tree.models import PolymorphicMPTTModel, PolymorphicTreeForeignKey
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from project.mixins import BaseModel, DeactivatedMixin
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from .manager import CategoryQuerySet
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from apps.content.models import ImageObject, Gallery, Video
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User = get_user_model()
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class Like(models.Model):
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user = models.ForeignKey(User, on_delete=models.CASCADE)
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created_at = models.DateTimeField(auto_now_add=True)
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update_at = models.DateTimeField(auto_now=True)
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def default_slug():
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return str(uuid4())
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def deferred_start_at_validator(value):
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if value < now():
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raise ValidationError(
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'Дата и время начала курса не может быть меньше текущих.',
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)
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class Course(BaseModel, DeactivatedMixin):
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DRAFT = 0
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PENDING = 1
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PUBLISHED = 2
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ARCHIVED = 3
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DENIED = 4
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STATUS_CHOICES = (
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(DRAFT, 'Draft'),
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(PENDING, 'Pending'),
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(PUBLISHED, 'Published'),
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(ARCHIVED, 'Archived'),
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(DENIED, 'Denied')
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)
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slug = models.SlugField(
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allow_unicode=True, null=True, blank=True,
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max_length=100, unique=True, db_index=True,
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)
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author = models.ForeignKey(
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User, on_delete=models.SET_NULL, null=True, blank=True
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)
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title = models.CharField('Название курса', default='', max_length=100, db_index=True)
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short_description = models.TextField(
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'Краткое описание курса', default='', db_index=True
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)
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from_author = models.TextField(
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'От автора', default='', null=True, blank=True
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)
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cover = models.ForeignKey(
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ImageObject, related_name='course_covers',
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verbose_name='Обложка курса', on_delete=models.CASCADE,
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null=True, blank=True,
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)
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price = models.DecimalField(
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'Цена курса', help_text='Если цена не выставлена, то курс бесплатный',
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max_digits=10, decimal_places=2, null=True, blank=True
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)
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is_infinite = models.BooleanField(default=False)
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deferred_start_at = models.DateTimeField(
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'Отложенный запуск курса', help_text='Заполнить если курс отложенный',
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null=True, blank=True, validators=[deferred_start_at_validator],
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)
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category = models.ForeignKey('Category', null=True, blank=True, on_delete=models.PROTECT)
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duration = models.IntegerField('Продолжительность курса', default=0)
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is_featured = models.BooleanField(default=False)
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status = models.PositiveSmallIntegerField(
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'Статус', default=DRAFT, choices=STATUS_CHOICES
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)
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likes = models.ManyToManyField(Like, blank=True)
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materials = models.ManyToManyField('Material', blank=True)
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gallery = models.ForeignKey(
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Gallery, verbose_name='Галерея работ',
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on_delete=models.CASCADE, null=True, blank=True,
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related_name='results_gallery',
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)
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created_at = models.DateTimeField(auto_now_add=True)
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update_at = models.DateTimeField(auto_now=True)
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class Meta:
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verbose_name = 'Курс'
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verbose_name_plural = 'Курсы'
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ordering = ['-created_at']
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def __str__(self):
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return str(self.id) + ' ' + self.title
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# def save(self, *args, **kwargs):
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# if not self.slug:
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# self.slug = slugify(
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# self.title[:90],
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# allow_unicode=True
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# )
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# if Course.objects.filter(slug=self.slug).exclude(id=self.id).exists():
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# self.slug += '_' + str(uuid4())[:6]
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# return super().save()
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@property
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def url(self):
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return self.get_absolute_url()
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def get_absolute_url(self):
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return reverse_lazy('course', args=[self.id])
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@property
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def is_free(self):
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if self.price:
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return False
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return True
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@property
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def deferred_start_at_humanize(self):
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return arrow.get(self.deferred_start_at).humanize(locale='ru')
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@property
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def created_at_humanize(self):
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return arrow.get(self.created_at).humanize(locale='ru')
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@property
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def is_deferred_start(self):
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if not self.deferred_start_at:
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return False
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if timezone.now() < self.deferred_start_at:
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return True
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return False
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@property
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def count_videos_in_lessons(self):
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return Video.objects.filter(lesson__in=self.lessons.all()).count()
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class Category(models.Model):
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title = models.CharField('Название категории', max_length=100)
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def __str__(self):
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return self.title
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class Meta:
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verbose_name = 'Категория'
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verbose_name_plural = 'Категории'
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ordering = ['title']
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class Lesson(BaseModel, DeactivatedMixin):
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title = models.CharField('Название урока', max_length=100)
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short_description = models.TextField('Краткое описание урока')
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course = models.ForeignKey(
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Course, on_delete=models.CASCADE, related_name='lessons'
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)
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cover = models.ForeignKey(
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ImageObject, related_name='lesson_covers',
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verbose_name='Обложка урока', on_delete=models.CASCADE,
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null=True, blank=True,
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)
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created_at = models.DateTimeField(auto_now_add=True)
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update_at = models.DateTimeField(auto_now=True)
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def __str__(self):
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return self.title
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class Meta:
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verbose_name = 'Урок'
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verbose_name_plural = 'Уроки'
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ordering = ('title',)
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class Material(models.Model):
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title = models.CharField('Название материала', max_length=100)
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cover = models.ForeignKey(
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ImageObject, related_name='material_covers',
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verbose_name='Обложка материала', on_delete=models.CASCADE,
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null=True, blank=True,
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)
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short_description = models.TextField('Краткое описание материала')
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created_at = models.DateTimeField(auto_now_add=True)
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update_at = models.DateTimeField(auto_now=True)
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def __str__(self):
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return self.title
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class Meta:
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verbose_name = 'Материал'
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verbose_name_plural = 'Материалы'
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ordering = ('title',)
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class Comment(PolymorphicMPTTModel, DeactivatedMixin):
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content = models.TextField('Текст комментария', default='')
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author = models.ForeignKey(User, on_delete=models.CASCADE)
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parent = PolymorphicTreeForeignKey(
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'self', null=True, blank=True, related_name='children',
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db_index=True, on_delete=models.PROTECT
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)
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created_at = models.DateTimeField(auto_now_add=True)
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update_at = models.DateTimeField(auto_now=True)
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@property
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def created_at_humanize(self):
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return arrow.get(self.created_at).humanize(locale='ru')
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def __str__(self):
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return self.content
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class Meta:
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ordering = ('-created_at',)
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class MPTTMeta:
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order_insertion_by = ['-created_at']
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class CourseComment(Comment):
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course = models.ForeignKey(
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Course, on_delete=models.CASCADE, related_name='comments'
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)
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class Meta(Comment.Meta):
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verbose_name = 'Комментарий курса'
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verbose_name_plural = 'Комментарии курсов'
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class LessonComment(Comment):
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lesson = models.ForeignKey(
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Lesson, on_delete=models.CASCADE, related_name='comments'
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)
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class Meta(Comment.Meta):
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verbose_name = 'Комментарий урока'
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verbose_name_plural = 'Комментарии уроков'
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