2012-06-27 65 views
2

因此,我試圖用父級使用批量加載程序創建實體。使用批量加載程序上傳實體與父母

我有一個客戶端實體:

class Client(db.Model): 
    identifier = db.StringProperty() 
    www_ip = db.StringProperty() 
    local_ip = db.StringProperty() 
    status=db.BooleanProperty() 

我想創建一個數據entiy爲客戶的孩子。

class Data(db.Model): 
    songscount = db.IntegerProperty() 
    nextorder = db.IntegerProperty(default=1) 
    players = db.ListProperty(str) 
    previousplayer = db.StringProperty() 

存在客戶實體。 Data.yaml是(無前同步碼):

transformers: 
- kind: Data 
    connector: csv 
    connector_options: 
    # TODO: Add connector options here--these are specific to each connector. 
    property_map: 
    - property: __key__ 
     external_name: key 
     import_transform: transform.create_deep_key(('Client', '__key__'), ('Data', transform.CURRENT_PROPERTY)) 
     export_transform: transform.key_id_or_name_as_string 

    - property: nextorder 
     external_name: nextorder 
     import_transform: transform.none_if_empty(int) 

    - property: players 
     external_name: players 
     import_transform: transform.none_if_empty(users.User) # Assumes email address 

    - property: previousplayer 
     external_name: previousplayer 
     import_transform: transform.none_if_empty(users.User) # Assumes email address 

    - property: songscount 
     external_name: songscount 
     import_transform: transform.none_if_empty(int) 

我明白,無論是transform.create_foreign_key或transform.create_deep_key需要被使用。我不明白的是如何通知我的客戶實體(即父母)。

我發現一個這樣的問題,討論How to set parent for datastrore entity during bulkloading data by appcfg.py on Google App Engine?,但'代碼配置'已被棄用。

感謝

回答

2

老問題,但以供將來參考,似乎答案就在這裏:

- property: __key__ 
     external_name: key 
     import_transform: transform.create_deep_key(('clientKey‘, ‘clientKey‘),(’key‘, transform.CURRENT_PROPERTY)) 
     export: 
     - external_name: clientKey 
     export_transform: transform.key_id_or_name_as_string_n(0) 
     - external_name: key 
     export_transform: transform.key_id_or_name_as_string_n(1) 

(改編自http://longsystemit.com/javablog/?p=23