资 源 简 介
Entity-Console helps you manage your data model (e.g. add, remove, or rename properties of entities), using a graphical front end, on the Google App Engine Datastore.
When developing software, we are constantly faced with ever changing requirements. These requirements can have impact on the data model of the application. The entity-console can help you manage these changes on the data model on Google App Engine.
If you are using JDO or JPA with a relational database and you need a new property on a class, which does not allow a null value, you would change your class and add a new not nullable column to your database table.
The Google App Engine Datastore does not have a schema as relational databases do. In the above-mentioned case, you have to add a property to all entities of the corresponding kind. So you have to write some code for looping trough all entities, add the new property, do some monitoring and error handling. And all this has to be done effici
