nested-resolvers?.clj

(def my-games {
               "game1" {:key "gamey-1" :name "hello-game" :created 2017 :sub-game ["foo1" "bar2"]}
               "game2" {:key "gamey-2" :name "goodbye-game" :created 2019 :sub-game ["bar3" "baz8"]}
               })

(def my-sub-games {
                   "foo1" {:name "foo game 1"}
                   "bar2" {:name "bar game 2"}
                   "bar3" {:name "bar game 3"}
                   "baz8" {:name "baz game 8"}
                   })


(def testy-schema
  '{:objects
    {:Sub-Games {:description "a sub game check of nested resolvers"
                 :fields {:name {:type (non-null String)}}}

     :Game {:description "A game object"
           :fields {:key {:type (non-null String)
                          :description "Unique identifier for this game"}
                    :created {:type Int}
                    :name {:type (non-null String)}
                    :subgame {:type (list :Sub-Games)
                              :resolve :sub-game-resolver}}}}
   :queries
   {:game {:type :Game
           :description "Retrieve a single Game by its name"
           :args {:name {:type (non-null String)
                         :description "Unique name for game."}}
           :resolve :game-resolver}}})

(defn game-resolver-func [app-context-map field-args outer-field-resolved-val]
;; in this case outer-field-resolved-val is nil
  (get my-games (:name field-args)))

(defn sub-game-resolver-func [app-context-map field-args outer-field-resolved-val]
;; here outer-field-resolved-val is the map returned from game-resolve-func
  (map #(get my-sub-games %) (:sub-game cont-field-resolved-val)))

(defn compiled-schema
  []
  (-> testy-schema
      (attach-resolvers {:game-resolver game-resolver-func
                         :sub-game-resolver sub-game-resolver-func})
      schema/compile))


;;query 
{ game(name: "game1") {
    key 
    created 
    subgame {
        name
        }
    }
}

;; output
{:data #ordered/map ([:game #ordered/map 
                      ([:key "gamey-1"] 
                       [:created 2017] 
                       [:subgame (#ordered/map 
                                   ([:name "foo game 1"]) 
                                   #ordered/map 
                                   ([:name "bar game 2"]))])])}