Show category if his have course

apps/course/migrations/0037_auto_20180507_1422.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.0.4 on 2018-05-07 14:22
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('course', '0036_auto_20180426_1256'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='course',
+            name='category',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='courses', to='course.Category'),
+        ),
+    ]

apps/course/models.py

@@ -77,7 +77,7 @@ class Course(BaseModel, DeactivatedMixin):
         'Отложенный запуск курса', help_text='Заполнить если курс отложенный',
         null=True, blank=True, validators=[deferred_start_at_validator],
     )
-    category = models.ForeignKey('Category', null=True, blank=True, on_delete=models.PROTECT)
+    category = models.ForeignKey('Category', null=True, blank=True, on_delete=models.PROTECT, related_name='courses')
     duration = models.IntegerField('Продолжительность курса', default=0)
     is_featured = models.BooleanField(default=False)
     status = models.PositiveSmallIntegerField(

apps/course/templatetags/lilcity_category.py

@@ -1,6 +1,6 @@
 from django import template
 
-from ..models import Category
+from ..models import Category, Course
 
 register = template.Library()
 
@@ -8,7 +8,7 @@ register = template.Library()
 @register.inclusion_tag('course/inclusion/category_items.html')
 def category_items(category=None):
     return {
-        "category_items": Category.objects.all(),
+        'category_items': Category.objects.filter(courses__status=Course.PUBLISHED).exclude(courses=None),
         'category': category,
     }
 
@@ -16,6 +16,6 @@ def category_items(category=None):
 @register.inclusion_tag('course/inclusion/category_menu_items.html')
 def category_menu_items(category=None):
     return {
-        "category_items": Category.objects.all(),
+        'category_items': Category.objects.filter(courses__status=Course.PUBLISHED).exclude(courses=None),
         'category': category,
     }