如何将Google App Engine数据存储区中的数据写入com.google.appengine.api.datastore.Text

Question

I have persistent object, with a string property that often is over 500 charachters. Google App Engine says I need to save it as a com.google.appengine.api.datastore.Text.

How do I either convert a String type to a com.google.appengine.api.datastore.Text type so I can use a setMethod() on the property, or otherwise get my long sting data into that persistent value?

Answer 1

setMethod(new Text(longStringValue));

String value = text.getValue();

If you are trying to update an existing String column to Text, then I am not sure if that is supported. You can try to change the column type from String to Text and see if it still loads (I can imagine that this might work, please let us know if it does). If not, you need to add a new column and have your application merge them appropriately.

Answer 2

要将字符串类型转换为我使用的com.google.appengine.api.datastore.Text类型

Text myText = new Text(myString);