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Fix crash in PostSearchViewModel #23247

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May 23, 2024
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Original file line number Diff line number Diff line change
Expand Up @@ -81,7 +81,9 @@ final class PostSearchService {
offset += posts.count
hasMore = !posts.isEmpty

let newPosts = posts.filter { !postIDs.contains($0.objectID) }
let newPosts = posts
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The existing defensive code was not enough to protected from the scenario when there are duplicated within a single response (posts). This is what I assume is causing the crash.

.deduplicated(by: \.objectID)
.filter { !postIDs.contains($0.objectID) }
postIDs.formUnion(newPosts.map(\.objectID))
self.delegate?.service(self, didAppendPosts: newPosts)
case .failure(let error):
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