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Developer tools · #doctrine
Learn how to set up, create, run, and roll back Doctrine Migrations for reliable database schema management. Includes a concrete example, configuration snippets, and verification steps.
Your entity vanishes after flush() with no error. This guide walks through the five most common Doctrine ORM causes—missing identifier strategies, uncommitted transactions, absent cascade persist, detached proxies, and swallowed exceptions—with ordered checks and fixes.
Doctrine's second-level cache shares serialized entity data across EntityManager instances. This guide covers configuration, mapping, verification, and common pitfalls.
Stop memory leaks and N+1 queries in Doctrine ORM. Learn how to combine the Paginator tool with array hydration for high-performance, read-heavy listings.
Prevent data loss in concurrent environments using Doctrine ORM's optimistic locking. Learn to implement @Version, handle lock exceptions, and identify when to switch to pessimistic locking.
When page load times spike due to repeated SELECTs, Doctrine’s lazy‑loading can create an N+1 problem. This guide walks through spotting the pattern, checking mappings, and applying fetch joins or eager loading to eliminate the extra queries.
Fetch-joining a to-many collection and paginating with setMaxResults truncates rows, not entities. Here is the Paginator-based design, its trust boundary, and when to switch to keyset paging.
Stop slow database scans in Doctrine ORM. Learn when to use setFirstResult vs. cursor-based pagination and how to avoid result inflation when using joins.
Learn how to paginate large result sets using Doctrine ORM's QueryBuilder, tune hydration, avoid N+1 queries, and verify performance with simple tests.
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