在播放2.0時加載initial-data.yml時出現問題

我試圖在play1.2.4中將端口轉移到YABE以播放2.0.4 Java。對於我創建了一個初始data.yml並試圖Global.java加載它在播放2.0時加載initial-data.yml時出現問題

 
#Users 
users: 
    - !!models.User 
     email:  [email protected] 
     password: secret 
     fullname: Bob 
     isAdmin: true 
#Posts 

posts: 

    - !!models.Post 
     id:   1 
     title:  About the model layer 
     postedAt: 2009-06-14 
     author:  
      - !!models.User 
       email: [email protected] 
     content: > 
        The model has a central position in a Play! application. Cut....

我Global.java低於

public void onStart(Application app) { 
     InitialData.insert(app); 
    } 

    static class InitialData { 
     public static void insert(Application app) { 
      if(Ebean.find(User.class).findRowCount() == 0) { 
       Map<String, List<Object>> all = (Map<String, List<Object>>)Yaml.load("initial-data.yml"); 
       Ebean.save(all.get("users")); 
       Ebean.save(all.get("posts")); 
       Ebean.save(all.get("comments")); 
      } 
     } 
    }

加載時我收到以下錯誤

ConstructorException：null;無法爲標記構造java對象：yaml.org，2002：models.Post; exception =不能爲JavaBean = [email protected]創建property = author;有3個參數沒有合適的構造函數發現類models.User

 
org.yaml.snakeyaml.constructor.ConstructorException: null; Can't construct a java object for tag:yaml.org,2002:models.Post; exception=Cannot create property=author for [email protected]; No suitable constructor with 3 arguments found for class models.User 

    org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:333) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:183) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructSequenceStep2(BaseConstructor.java:277) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructSequence(BaseConstructor.java:248) 

    org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlSeq.construct(SafeConstructor.java:440) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:183) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:326) 

    org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:143) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:307) 

    org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:459) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:183) 

    org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:142) 

    org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:128) 

    org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:480) 

    org.yaml.snakeyaml.Yaml.load(Yaml.java:411)

任何想法，爲什麼出現這種情況？

來源

2012-10-24 Cloud

曼紐爾，感謝您的幫助。

當我稍微修改了YAML我得到它的工作，我只是刪除了「 - 」，這是在「model.class」

 
#Users 
users: 
    - !!models.User 
     email:  [email protected] 
     password: secret 
     fullname: Bob 
     isAdmin: true 
#Posts 

posts: 

    - !!models.Post 
     id:   1 
     title:  About the model layer 
     postedAt: 2009-06-14 
     author: !!models.User 
       email: [email protected] 
     content: > 
        The model has a central position in a Play! application. Cut....

任何知道前面的「 - 」代表？

來源

2012-10-25 08:13:17 Cloud

我認爲' - '說「列表中的元素」 – Maxence

我已經和YAML一起工作了一段時間，但看起來好像您在Post中重新創建了一個新用戶，而不是參考Bob。

我想嘗試這樣的事：

models.User(bob): 
    email:  [email protected] 
    password: secret 
    fullname: Bob 
    isAdmin: true 

models.Post(firstPost): 
    id:   1 
    title:  About the model layer 
    postedAt: 2009-06-14 
    author:  bob 
    content: The model has a central position in a Play! application.

來源

2012-10-25 06:15:22

在播放2.0時加載initial-data.yml時出現問題

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