Object Mapping #265
Description
Problem
Viaduct developers need to be able to map arbitrary types (e.g. a Thrift object) to a GraphQL type.
What are we planning to do about it?
We aim to build a generic object mapping system in Viaduct Modern that can transform data from one value domain into another, given a target type. Existing use cases include:
- Output Type Mapping (would be supported in this project):
- Thrift response → GRT
- JSON response → GRT
- Input Type Mapping (to be supported in the future):
- GRT→ Thrift request
One specific case is JSON (unclear how JSON scalar type in GraphQL is represented in GRT, maybe Map?) → Thrift request.
The overarching goal is to provide a flexible interface that enables Viaduct architects to define default mappings between domains, while allowing tenants to specify custom field mappers for specialized field-level conversions.