Method resolveCustomFields

query/outputnode_graphql.go:705–723

resolveCustomFields resolves fields with custom directive. Here is the rough algorithm that it follows. queryUser { name @custom age school { name children class @custom { name numChildren } } cars @custom { name } } For fields with @custom directive 1. There w

(childFields []gqlSchema.Field,
	parentNodeHeads []fastJsonNode)

// For fields without custom directive we recursively call resolveCustomFields and let it do the
// work.
func (genc *graphQLEncoder) resolveCustomFields(childFields []gqlSchema.Field,
	parentNodeHeads []fastJsonNode) {
	wg := &sync.WaitGroup{}
	for _, childField := range childFields {
		if childField.Skip() || !childField.Include() {
			continue
		}

		if childField.IsCustomHTTP() {
			wg.Add(1)
			go genc.resolveCustomField(childField, parentNodeHeads, wg)
		} else if childField.HasCustomHTTPChild() {
			wg.Add(1)
			go genc.resolveNestedFields(childField, parentNodeHeads, wg)
		}
	}
	// wait for all the goroutines to finish
	wg.Wait()
}

// resolveCustomField resolves the @custom childField by making an external HTTP request and then
// updates the fastJson tree with results of that HTTP request.