clojurescript - Om/Clojurescript：呈现重置应用程序状态的问题

Question

一旦此小部件所需的数据到达，我正在尝试使用 om 显示组件。我想出了以下（大致）：

(def data (atom     {}))                                                               

(go (let [response (<! (http/get "../rest/ds" ))]                               
  (reset! data (:result (:body response)))))

(om/root
  (fn [app owner]                                                                  
    (reify
     om/IInitState
     (init-state [_]
       (prn "(1) returning initial state now")
       {:text "Hello world!"})
     om/IRenderState 
     (render-state [this state]                                                   
        (prn state) ; <-- here: not the state that I reset! before but the original state
        (do-something ...))))                                                  
  data
  {:target (. js/document (getElementById "app"))})

尽管似乎触发了重新渲染，但state内部似乎render-state从来都不是我设置的。reset!我在这里用错了吗？当直接访问它时@data，render-state它会显示我设置的正确值reset!。

Answer 1

中的状态(prn state)是组件状态。atomdata是应用程序状态，在您的组件中您已调用app.

(om/root
  (fn [app owner]  ; <- `app` is the application state                                                              
    (reify
     om/IInitState
     (init-state [_]
       (prn "(1) returning initial state now")
       {:text "Hello world!"})
     om/IRenderState 
     (render-state [this state]                                                   
        (prn app) ; <- refer to application state instead
        (do-something ...))))                          
  data
  {:target (. js/document (getElementById "app"))})