Workaround for the problem with infinite auto-pagination when has offset parameter

shop/cascade/catalog.py

@@ -57,7 +57,16 @@ def get_render_template(self, context, instance, placeholder):
         return select_template(templates)
 
     def render(self, context, instance, placeholder):
-        context['pagination'] = instance.glossary.get('pagination', 'paginator')
+        try:
+            paginator = context['paginator']
+        except KeyError:
+            paginator = False
+        if paginator and paginator.get_offset(paginator.request) > 0:
+            pagination = 'paginator'
+        else:
+            pagination = instance.glossary.get('pagination', 'paginator')
+
+        context['pagination'] = pagination
         return context
 
     @classmethod

shop/static/shop/js/catalog.js

@@ -124,6 +124,8 @@ djangoShopModule.controller('CatalogListController', ['$log', '$scope', '$http',
 	this.loadProducts = function(config) {
 		if ($scope.isLoading || fetchURL === null)
 			return;
+
+		config = this.deleteExistedSearchParams(config);
 		$scope.isLoading = true;
 		$http.get(fetchURL, config).then(function(response) {
 			fetchURL = response.data.next;
@@ -136,6 +138,19 @@ djangoShopModule.controller('CatalogListController', ['$log', '$scope', '$http',
 		});
 	};
 
+	this.deleteExistedSearchParams = function (config) {
+		if (typeof URLSearchParams !== 'undefined') {
+			let searchParams =  new URLSearchParams(fetchURL.substring(fetchURL.indexOf('?')));
+			for (let key in config.params) {
+				if (searchParams.has(key)) {
+					delete config.params[key];
+				}
+			}
+		}
+
+		return config;
+	};
+
 	this.resetProductsList = function() {
 		fetchURL = djangoShop.getLocationPath();
 		$scope.catalog.products = [];

tests/test_cascade_plugins.py

@@ -0,0 +1,42 @@
+from django.test import TestCase
+from cms.api import add_plugin
+from cms.models import Placeholder
+from shop.cascade.catalog import ShopCatalogPlugin
+from rest_framework.pagination import LimitOffsetPagination
+from unittest.mock import MagicMock
+
+
+def get_plugin_model_instance():
+    placeholder = Placeholder.objects.create(slot='test')
+    model_instance = add_plugin(
+        placeholder,
+        ShopCatalogPlugin,
+        'en',
+    )
+    return model_instance
+
+
+class ShopCatalogPluginTests(TestCase):
+    def test_plugin_context_with_auto_pagination(self):
+        model_instance = get_plugin_model_instance()
+        plugin_instance = model_instance.get_plugin_class_instance()
+        model_instance.glossary['pagination'] = 'auto'
+        context = plugin_instance.render({}, model_instance, None)
+        self.assertIn('pagination', context)
+        self.assertEqual(context['pagination'], 'auto')
+
+    def test_plugin_context_will_return_pagination_with_offset_when_pagination_is_auto(self):
+        model_instance = get_plugin_model_instance()
+        plugin_instance = model_instance.get_plugin_class_instance()
+        model_instance.glossary['pagination'] = 'auto'
+        pagination = LimitOffsetPagination()
+        pagination.request = 123
+        pagination.get_offset = MagicMock(return_value=1)
+
+        context = plugin_instance.render({
+            'paginator': pagination
+        }, model_instance, None)
+
+        pagination.get_offset.assert_called_with(123)
+        self.assertIn('pagination', context)
+        self.assertEqual(context['pagination'], 'paginator')