Lifetimes not supported in derive(GraphQLObject)

[djc]

The Diesel tutorial seems to advocate (somewhat sensibly) that an insertion type (like NewHuman) contains the human's name as a reference (&'str). This of course means the containing struct gains a lifetime annotation. When I tried to derive(GraphQLObject) on such a struct, I got errors:

error[E0106]: missing lifetime specifier
   --> src/models.rs:293:10
    |
293 | #[derive(GraphQLInputObject, Insertable)]
    |          ^^^^^^^^^^^^^^^^^^ expected lifetime parameter

error[E0261]: use of undeclared lifetime name `'a`
   --> src/models.rs:293:10
    |
293 | #[derive(GraphQLInputObject, Insertable)]
    |          ^^^^^^^^^^^^^^^^^^ undeclared lifetime