GraphQL Tutorial

A query language for your API GraphQL is a query language for APIs, created at Facebook. Instead of many fixed endpoints that each return a fixed shape, GraphQL exposes a single ...

Schema first Every GraphQL API is defined by a strongly-typed schema that describes what data exists and what operations are allowed. The schema is the contract between client and ...

What a resolver is The schema says what is available; resolvers say how to fetch it. A resolver is a function attached to a field that returns that field's value – from a ...

Arguments Fields can take arguments to filter or shape results: Variables Hard-coding values into a query string is fragile. Declare variables and pass them separately – the query ...

Add the starter Spring for GraphQL auto-configures a single endpoint at /graphql and, in development, a browser IDE (GraphiQL) to explore your API. Define the schema Put the ...

Pagination Never return an unbounded list. The community standard is cursor-based (connection) pagination , which returns edges plus page info and handles large, changing datasets ...