Passing preloadedRequests to prepareData for queries with aliased parameterized fields

[edorainos]

Related to #50

Passing preexisting query-payload pairs to prepareData() is messy when the query contains aliased parameterized fields, because Relay modifies the field names to prevent name collisions. To make a preexisting query-response pair for a query containing aliased parameterized fields, I need to use a Relay internal function generateRQLFieldAlias() to produce a valid response. This what I’m doing:

Example query:

const examsQueryNode = Relay.QL`
query ExamsRoute {
    exams {
        SPRING2017: examAverage(term: "SPRING2017")
    }
}
`;

Function to generate response for query-response pair:

import generateRQLFieldAlias from 'react-relay/lib/generateRQLFieldAlias';

function createResponse( examsData ) {
    const preloadedResponse = { exams: {} };
    preloadedResponse.exams[generateRQLFieldAlias('examAverage.SPRING2017.term(SPRING2017)')] = examsData.SPRING2017;
    return preloadedResponse;
}

Does it seem reasonable to submit a pull request to Relay to make a public interface to the generatedRQLFieldAlias() function for this purpose?