Fix failing queries with nested filters that require channel slug

saleor/graphql/core/fields.py

@@ -175,6 +175,10 @@ def connection_resolver(
             cls.resolve_connection, connection, args, max_limit=max_limit
         )
 
+        # for nested filters get channel from ChannelContext object
+        if "channel" not in args and hasattr(root, "channel_slug"):
+            args["channel"] = root.channel_slug
+
         iterable = cls.filter_iterable(
             iterable, filterset_class, filters_name, info, **args
         )

saleor/graphql/product/tests/test_collection.py

@@ -314,7 +314,7 @@ def test_collections_query_as_staff_without_channel(
 
 
 def test_filter_collection_products(
-    user_api_client, product_list, published_collection, channel_USD
+    user_api_client, product_list, published_collection, channel_USD, channel_PLN
 ):
     # given
     query = GET_FILTERED_PRODUCTS_COLLECTION_QUERY
@@ -340,6 +340,39 @@ def test_filter_collection_products(
     assert product_data["id"] == graphene.Node.to_global_id("Product", product.pk)
 
 
+def test_filter_collection_published_products(
+    user_api_client, product_list, published_collection, channel_USD, channel_PLN
+):
+    # given
+    query = GET_FILTERED_PRODUCTS_COLLECTION_QUERY
+
+    for product in product_list:
+        published_collection.products.add(product)
+
+    product = product_list[0]
+    listing = product.channel_listings.first()
+    listing.is_published = False
+    listing.save(update_fields=["is_published"])
+
+    product_id = graphene.Node.to_global_id("Product", product.id)
+
+    variables = {
+        "id": graphene.Node.to_global_id("Collection", published_collection.pk),
+        "filters": {"isPublished": True},
+        "channel": channel_USD.slug,
+    }
+
+    # when
+    response = user_api_client.post_graphql(query, variables)
+
+    # then
+    content = get_graphql_content(response)
+    products = content["data"]["collection"]["products"]["edges"]
+
+    assert len(products) == len(product_list) - 1
+    assert product_id not in {node["node"]["id"] for node in products}
+
+
 def test_filter_collection_products_by_multiple_attributes(
     user_api_client,
     published_collection,