LIL-595 Сортировка при выводе курсов на сайте

apps/course/models.py

@@ -1,4 +1,5 @@
 import arrow
+from random import shuffle
 from uuid import uuid4
 from django.db import models
 from django.core.exceptions import ValidationError
@@ -148,6 +149,24 @@ class Course(BaseModel, DeactivatedMixin):
     def count_videos_in_lessons(self):
         return Video.objects.filter(lesson__in=self.lessons.all()).count()
 
+    @classmethod
+    def shuffle(cls, qs, order_is_featured = True):
+        if order_is_featured:
+            featured = []
+            other = []
+            for c in list(qs):
+                if c.is_featured:
+                    featured.append(c)
+                else:
+                    other.append(c)
+            shuffle(featured)
+            shuffle(other)
+            return featured + other
+        else:
+            all = list(qs)
+            shuffle(all)
+            return all
+
 
 class Category(models.Model):
     title = models.CharField('Название категории', max_length=100)

apps/course/views.py

@@ -1,4 +1,3 @@
-from random import shuffle
 from paymentwall import Pingback
 
 from django.contrib.auth import get_user_model
@@ -276,19 +275,7 @@ class CoursesView(ListView):
         context = super().get_context_data()
         filtered = CourseFilter(self.request.GET)
         context.update(filtered.data)
-        # Иммитация order_by('?'), чтобы можно было использовать пагинацию
-        # если что, сделать свой QuerySet для Course с методом, который возвращает такой список
-        course_items = context.get('course_items')
-        featured = []
-        other = []
-        for ci in course_items:
-            if ci.is_featured:
-                featured.append(ci)
-            else:
-                other.append(ci)
-        shuffle(featured)
-        shuffle(other)
-        context['course_items'] = featured + other
+        context['course_items'] = Course.shuffle(context.get('course_items'))
         return context
 
     def get_template_names(self):

project/views.py

@@ -74,7 +74,7 @@ class IndexView(TemplateView):
             'online': online,
             'online_coming_soon': online_coming_soon,
             'school_schedule': school_schedule,
-            'course_items': Course.objects.filter(status=Course.PUBLISHED)[:6],
+            'course_items': Course.shuffle(Course.objects.filter(status=Course.PUBLISHED)[:6]),
             'is_purchased': school_payment_exists,
             'min_school_price': SchoolSchedule.objects.aggregate(Min('month_price'))['month_price__min'],
             'school_schedules': SchoolSchedule.objects.all(),