具有动态TextProperty的NDB Expando模型? [英] NDB Expando Model with dynamic TextProperty?

问题描述

我正在尝试:

MyModel({'text': db.Text('text longer than 500 byets')})

但是得到:

BadValueError: Indexed value fb_education must be at most 500 bytes

我认为这只是旧数据库api对这一问题的影响.

I'm thinking this is just a carry over from this issue with the old db api.

https://groups.google.com/forum/?fromgroups#！topic/google-appengine/wLAwrjtsuks

推荐答案

首先动态创建实体:

 kindOfEntity = "MyTable"
class DynamicEntity(ndb.Expando):
     @classmethod
     def _get_kind(cls):
        return kindOfEntity

然后按如下所示动态/动态分配文本属性，如下所示

then after to assign Text Properties run time/dynamically as shown below

dbObject = DynamicEntity()
key = "studentName"
value = "Vijay Kumbhani"
textProperties = ndb.TextProperty(key)
dbObject._properties[key] = {}
dbObject._values[key] = {}
dbObject._properties[key] = textProperties 
dbObject._values[key] = value
dbObject.put()

然后在为关键属性分配了文本属性之后

then after key properties assign with Text properties

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