// getFResolver returns a GraphQL field resolver for REST layer field handler
func getFResolver(fieldName string, f schema.Field) graphql.FieldResolveFn {
s, serialize := f.Validator.(schema.FieldSerializer)
if !serialize && f.Handler == nil {
return nil
}
return func(rp graphql.ResolveParams) (interface{}, error) {
data, ok := rp.Source.(map[string]interface{})
if !ok {
return nil, nil
}
var err error
val := data[fieldName]
if f.Handler != nil {
val, err = f.Handler(rp.Context, val, rp.Args)
}
if err == nil && serialize {
val, err = s.Serialize(val)
}
return val, err
}
}
func getSubFieldResolver(parentField string, r *resource.Resource, f schema.Field) graphql.FieldResolveFn {
s, serialize := f.Validator.(schema.FieldSerializer)
return func(p graphql.ResolveParams) (data interface{}, err error) {
parent, ok := p.Source.(map[string]interface{})
if !ok {
return nil, nil
}
var item *resource.Item
// Get sub field resource
item, err = r.Get(p.Context, parent[parentField])
if err != nil {
return nil, err
}
data = item.Payload
if f.Handler != nil {
data, err = f.Handler(p.Context, data, p.Args)
}
if err == nil && serialize {
data, err = s.Serialize(data)
}
return data, err
}
}