Querry KitType-safe query tooling for NestJS APIs.

Focused packages for parsing requests, validating field projections, resolving includes, shaping Prisma-backed responses, and removing repetitive API plumbing.

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GitHub organization

🧩 Composable packages

Install only the query utilities your API needs, with small package boundaries and framework-friendly APIs.

📦 DTO-backed behavior

Keep field selection, relation includes, validation, and response shaping aligned with your public DTO model.

🔐 Access-control ready

Keep query services CASL-agnostic while still supporting optional Prisma access filters in NestJS applications.

Repositories

Querry Kit is organized as small, focused open-source repositories. Each package handles one part of predictable query handling for NestJS APIs.

@querry-kit/nest-util

General-purpose NestJS utilities for query parsing, nested query object creation, request body normalization, object diffs, validation error mapping, and Swagger helpers.

Parse and normalize request query values
Map validation errors into stable API responses
Reuse decorators and response helpers in Nest controllers

GitHub Docs

@querry-kit/nest-prisma-query

Generic NestJS query helpers for Prisma-compatible delegates, pagination DTOs, Swagger response metadata, and optional CASL Prisma access filters.

Wrap Prisma delegates with a typed QueryService
Use pagination DTOs with class-validator, class-transformer, and Swagger
Merge app access rules with caller filters for protected reads

GitHub Docs

@querry-kit/nest-fields-query

DTO-backed field projection utilities for parsing nested fields expressions, validating projections, deriving relation includes, and shaping API responses.

Parse nested fields query expressions
Validate projections against DTO schemas
Project response objects and build relation includes

GitHub Docs