courses pricing updated with only hving rub pricings

apps/course/models/course.py

@@ -417,24 +417,17 @@ class Course(models.Model):
         return self.__class__.recalculate_lessons_count_for_course(self.pk)
 
     def get_currency_for_language(self, lang):
-        normalized = (lang or 'en').lower()
-        if normalized.startswith('ru'):
-            return CURRENCY_RUB
-        return CURRENCY_USD
+        return CURRENCY_RUB
 
     def get_price_for_language(self, lang):
         if self.is_free:
             return Decimal('0.00')
-        if self.get_currency_for_language(lang) == CURRENCY_RUB:
-            return Decimal(self.price_rub or 0)
-        return Decimal(self.price or 0)
+        return Decimal(self.price_rub or 0)
 
     def get_final_price_for_language(self, lang):
         if self.is_free:
             return Decimal('0.00')
-        if self.get_currency_for_language(lang) == CURRENCY_RUB:
-            return Decimal(self.final_price_rub or 0)
-        return Decimal(self.final_price or 0)
+        return Decimal(self.final_price_rub or 0)
 
 
     def save(self, *args, **kwargs):

apps/course/serializers/admin.py

@@ -146,10 +146,8 @@ class AdminCourseListSerializer(serializers.ModelSerializer):
             'lessons_count',
             'status',
             'is_free',
-            'price',
             'price_rub',
             'discount_percentage',
-            'final_price',
             'final_price_rub',
             'participant_count',
             'created_at'
@@ -220,10 +218,8 @@ class AdminCourseDetailSerializer(serializers.ModelSerializer):
             'short_description',
             'status',
             'is_free',
-            'price',
             'price_rub',
             'discount_percentage',
-            'final_price',
             'final_price_rub',
             'is_group_chat_locked',
             'is_professor_chat_locked',
@@ -233,7 +229,7 @@ class AdminCourseDetailSerializer(serializers.ModelSerializer):
             'created_at',
             'updated_at'
         ]
-        read_only_fields = ['id', 'final_price', 'final_price_rub', 'created_at', 'updated_at']
+        read_only_fields = ['id', 'final_price_rub', 'created_at', 'updated_at']
 
     def get_professor_name(self, obj):
         return ", ".join([p.fullname for p in obj.professors.all()])

apps/course/views/course.py

@@ -176,7 +176,7 @@ class CourseListAPIView(ListAPIView):
         if is_free := filters.get('is_free'):
             is_free = is_free.lower() == 'true'
             queryset = queryset.filter(
-                Q(is_free=is_free) | Q(price=0) if is_free else Q(is_free=False, price__gt=0)
+                Q(is_free=is_free) | Q(price_rub=0) if is_free else Q(is_free=False, price_rub__gt=0)
             )
         if is_online := filters.get('is_online'):
             is_online = is_online.lower() == 'true'