GraphQL lets a client choose a response shape from a typed schema, but schema syntax does not price the work or authorize private objects. This track follows a case-review query that joins cases, assignees, and activity. It covers schema and nullability, resolver batching, query admission, and mutation error states. A deployment needs a chosen server implementation and database layer; the lessons focus on contracts that remain important across libraries. The same object authorization rule applies whether a case is reached from a root field or through a nested relation.
Topics in this track
- GraphQL Schema Nullability and Evolution — Design fields whose absence and failure behavior can change without breaking existing clients.
- GraphQL Resolver Batching and Tenant Scope — Prevent nested field fan-out while keeping request-local caches inside one actor and tenant boundary.
- GraphQL Operation Cost and Admission — Bound depth, breadth, list sizes, and resolver work before executing a client-selected query.
- GraphQL Mutation Errors and Pagination Contracts — Make writes idempotent where needed and distinguish expected outcomes from execution failures.
Prerequisite paths
Backend and API Systems; API Evolution and Compatibility Windows.
Neighbor track
Feature Release and Experiment Controls.
Practice path
Build Project: tenant-safe GraphQL case API and check decisions in Web Development: release and GraphQL decisions quiz.