Channel Indexes contain non-channel Web Pages after they are Published

[bluemodus-gshepherd]

Describe the bug
When publishing a Web Page under a specific channel, that Web Page appears in search indexes not designated for the channel the Web Page was published under.

Search indexes appropriately exclude the Web Page when manually rebuilding the index (Development -> Search -> Rebuild).

To Reproduce
Steps to reproduce the behavior:

1. Confirm you have configured at least 2 channels, Channel A and Channel B, for your instance.
2. Confirm you have a search index configured for Channel A.
3. Create and/or Publish a Web Page for Channel B
4. Perform a Search against the search index
5. See the Web Page published on Channel B appear in the results for Channel A

Expected behavior
The Web Page published in Channel B does not appear in the results for a search index configured for Channel A.

Screenshots

Library Version
Library Version
Kentico.Xperience.Lucene 7.0.0
Lucene.Net 4.8.0-beta00016

Desktop (please complete the following information):

• N/A

Smartphone (please complete the following information):

• N/A

Additional context
From my testing I didn't see a place where the Index's channel was compared against the IndexEventWebPageItemModel.WebsiteChannelName.

DefaultLuceneTaskLogger has a condition to see if the Web Page can be indexed by a specific index name (IndexedItemModelExtensions.IsIndexedByIndex(...)), but this always returned true and therefore did not prevent the item from being indexed. The method has access to both a retrieved index and the IndexEventWebPageItemModel channel names to compare and seemed like an adequate spot.

Our workaround was to configure a hard-coded string with the site code name and check it within a Custom Indexing strategy that we configured on the Index.

[liparova]

Thank you for bringing this to our attention. We will investigate and keep you informed of our progress.

[bkapustik]

Fixed in pr #71