Update Material model

apps/course/migrations/0026_auto_20180208_1053.py

@@ -0,0 +1,24 @@
+# Generated by Django 2.0.2 on 2018-02-08 10:53
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('course', '0025_course_gallery'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='course',
+            name='price',
+            field=models.DecimalField(blank=True, decimal_places=2, help_text='Если цена не выставлена, то курс бесплатный', max_digits=10, null=True, verbose_name='Цена курса'),
+        ),
+        migrations.AlterField(
+            model_name='material',
+            name='cover',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='material_covers', to='content.ImageObject', verbose_name='Обложка материала'),
+        ),
+    ]

apps/course/models.py

@@ -128,7 +128,11 @@ class Lesson(models.Model):
 
 class Material(models.Model):
     title = models.CharField('Название материала', max_length=100)
-    cover = models.ImageField('Фон материала', upload_to='materials')
+    cover = models.ForeignKey(
+        ImageObject, related_name='material_covers',
+        verbose_name='Обложка материала', on_delete=models.CASCADE,
+        null=True, blank=True,
+    )
     short_description = models.TextField('Краткое описание материала')
 
     created_at = models.DateTimeField(auto_now_add=True)