When bringing a REST API into a schema using @rest the response may need to be transformed to align with the GraphQL type used the field's type.
For more on what transforms is and how it operates within the custom @rest directive, see our documentation.
- filter shows how the response of a REST API can be filtered
- combineintostring shows how a new field in the return type can be created by concatenating some other fields (like address parts into one address)
- jsonobjectToJsonarray shows how an array of data (say coords) can be converted into an object,
{"lat":, "lon",..}so that it can be fed into some other system that requires data to be expressed that way - jsonobjectToJsonarray shows how an object (typically where each key is an id of a record) can be converted into an array (e.g.,
{"1":{"name": "john"}, "2": "jane"}can be converted to[{"id":"1", "name": "john"}, {"id":"2", name: "jane"}]), so that it can then behave well for GraphQL processing.