> The main problem GraphQL tries to solve is overfetching. My issue with this article is that, as someone who is a GraphQL fan, that is far from what I see as its primary benefit, and so the rest of the article feels like a strawman to me. TBH I see the biggest benefits of GraphQL are that it (a) forces a much tighter contract around endpoint and object definition with its type system, and (b) schema evolution is muc…
If you generate TypeScript types from OpenAPI specs then you get contracts for both directions. There is no problem here for GraphQL to solve.
But OpenAPI is verbose to the point of absurdity. You can't feasibly write it by hand. So you can't do schema first development. You need an open API compatible lib for authoring your API, you need some tooling to generate the schema from the code, then you need another tool to generate types from the schema. Each step tends to implement the spec to varying degrees, creating gaps in types, or just outright failing.
Fwiw I tried many, many tools to generate the typescript from the schema. Most resulted in horrendous, bloated code. The official generators especially. Many others just choked on a complex schema, or used basic string concatenation to output the typescript leading to invalid code. Additionally the cost of the generated code scales with the schema size, which can mean shipping huge chunks of code to the client as your API evolves
The tool I will wholeheartedly recommend (and which I am unaffiliated beside making a few PRs) is openapi-ts. It is fast and correct, and you pay a fixed cost - there's a fetch wrapper for runtime and everything else exists at the type level.
I was kinda surprised how bad a lot of the tooling was considering how mature OpenAPI is. Perhaps it's advanced in the last year or so, when I stopped working on the project where I had to do this.