During query execution, you can add to the response’s "extensions" => { ... } Hash. By default, no "extensions" key is present in the result, but if you call the method below, it will be present with the given values.
To add to "extensions", call context.response_extensions[key] = value during execution. For example:
field :to_dos, [ToDo]
def to_dos
warnings = context.response_extensions["warnings"] ||= []
warnings << "To-Dos will be disabled on Jan. 31, 2022."
context[:current_user].deprecated_to_dos
end
That would add to the final query response:
{
"data" => { ... },
"extensions" => {
"warnings" => ["To-Dos will be disabled on Jan. 31, 2022"],
},
}
Values written to context.response_extensions are added to the GraphQL response verbatim.