AppEngine批量加载器和自动创建的属性值 [英] AppEngine bulk loader and automatically created property values

问题描述

在我的模型中，我有一个属性：

$ p $ created = db.DateTimeProperty（required = True，auto_now_add = True）


在数据存储中创建此类型的对象时，创建的属性自动填充。

当我使用没有此字段的表的批量加载器工具时，当我上传到AppEngine时，字段不会自动填充创建新的对象。

如何设置从批量加载器上传的新对象的创建时间？

解决方案

在bulkloader.yaml中添加如下内容：

   - property：created 
 external_name：created 
 import_transform：lambda x：datetime.datetime.utcnow（）
  

In my model I have a property:

created = db.DateTimeProperty(required=True, auto_now_add=True)

When an object of this type is created in the datastore, the created property is automatically populated.

When I use the bulk loader tool with a table which does not have this field, the field is not automatically populated when I upload to AppEngine, at which time new objects are created.

How can I make it set the created time on new objects uploaded from the bulk loader?

解决方案

Add something like the following to bulkloader.yaml:

- property: created
  external_name: created
  import_transform: "lambda x: datetime.datetime.utcnow()"

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