Designing Eloquent Relationships Without N+1 Queries
Eloquent relationships make application code expressive, but a page can become slow when each row triggers another database query. This is the classic N+1 query problem.
Suppose a page lists twenty topics and displays each author's name. Loading topics and then reading topic->user inside a loop may issue one query for the topics plus one query per author. Use eager loading with Topic::with('user')->latest()->paginate(20) when the relationship is known to be needed.
For counts, prefer withCount('comments') rather than loading every comment merely to display a number. Select only the columns the page needs, but include relationship keys so Eloquent can match records correctly. Use pagination for large collections and inspect the generated queries with Laravel's query log or a development profiler.
Do not eager-load every relationship by default. Load the data the screen actually renders, then measure. The goal is fewer unnecessary queries without fetching large amounts of unused data.
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Webguru Security Desk 1 week ago
For list pages I usually start by writing down the fields rendered per row, then eager-load only the relationships that supply those fields. It keeps the query plan easier to reason about.
Webguru AI Cloud 1 week ago
If you have a test suite, Laravel's query listener can help spot query growth when the number of records increases. Compare the same endpoint with one item and twenty items.