I had the same problem...
在 2013年8月21日星期三UTC+8上午11时59分22秒，JP TONG写道：
>
> I replace DB with NDB, but template use NDB KeyProperty no work,
>
> old DB models
>
> class Jword(db.Model):
> fjword = db.StringProperty(required=True) #单词
> fpronunciation = db.StringProperty() #读音
> fcword = db.StringProperty() #中文词义
>
> class Nword(db.Model):
> fjword=db.ReferenceProperty(Jword)
> fdate=db.DateProperty(auto_now=True)
> flevnum=db.IntegerProperty()
>
> NDB models
>
> class Jword(ndb.Model):
> fjword = ndb.StringProperty(required=True) #单词
> fpronunciation = ndb.StringProperty() #读音
> fcword = ndb.StringProperty() #中文词义
>
> class Nword(ndb.Model):
> fjword=ndb.KeyProperty(kind=Jword)
> fdate=ndb.DateProperty(auto_now=True)
> flevnum=ndb.IntegerProperty()
>
> template code
>
> {% for nword in newword %}
> {# Each "nword" is a newword model object. #}
> {{ nword.full_name|upper }}
>
> <tr>
> <td><input type="checkbox" name="pitem" value="{{nword.key}}"
> class="selrow"/></td>
> <td>{{nword.fjword.fjword}}</td>
> <td>{{nword.fjword.fpronunciation}}</td>
> <td>{{nword.fjword.fcword}}</td>
> <td>{{nword.flevnum}}</td>
> <td>{{nword.fdate}}</td>
> </tr>
> {% endfor %}
> --
>
> {{nword.fjword.fjword}} DB disply well, but NDB not display.
>
> Thank.
>
> ---------------------------------
> Sunny
>
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