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doctrine-batch-processing

Skill2 starsChanged 6 months agoMITView on GitHub

Process large-volume Doctrine datasets (million-row imports, mass updates, ETL) without memory blowup. Use `toIterable()` + `EntityManager::clear()` per batch, partial hydration with DQL projection (`NEW App\Dto\X(...)`), `HINT_READ_ONLY` when entities aren't mutated, `MEMORY_PEAK_USAGE` tracking. Trigger on "iterate over all entities", "import N rows", "mass update", "fix memory limit exceeded", or "OOM on Doctrine query".

The file

We split this skill into the rules it gives an agent

4 rules. About 0 are common, 4 are distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈4

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Verify lifecycle behavior with targeted tests.

    line 24
  2. Distinctive:

    Keep owning/inverse sides coherent.

    line 27
  3. Distinctive:

    Avoid destructive migration jumps in one release.

    line 28
  4. Distinctive:

    Use this file for execution posture and risk controls.

    line 32

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Doctrine Batch Processing (Symfony)

Use when

  • Designing entity relations or schema evolution.
  • Improving Doctrine correctness/performance.

Default workflow

  1. Model ownership/cardinality and transactional boundaries.
  2. Apply mapping/schema changes with migration safety.
  3. Tune fetch/query behavior for hot paths.
  4. Verify lifecycle behavior with targeted tests.

Guardrails

  • Keep owning/inverse sides coherent.
  • Avoid destructive migration jumps in one release.
  • Eliminate accidental N+1 and over-fetching.

Progressive disclosure

  • Use this file for execution posture and risk controls.
  • Open references when deep implementation details are needed.

Output contract

  • Entity/migration changes.
  • Integrity and performance decisions.
  • Validation outcomes and rollback notes.

References

  • reference.md
  • docs/complexity-tiers.md

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