Review Snippets and AggregateRating: Whose Reviews Count? The Self-Serving Review Rule, Rating Math and Risks
Only reviews that are visible on the page, come from users and belong to the reviewed item are eligible for star ratings; a store writing its own rating into Organization runs into the self-serving rule. We filter Bookstore's book reviews through moderation, get the average from one query that EF Core translates to SQL, round it once, and keep page and markup identical with tests.
15 Nov 2026
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10 min
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