Research Log of Web Science Students

Computer Science is not simply programming

Google Database

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Problem: I’ve been wondering why only one project can be uploaded by any user. We use Google so it should scale right?

Solution: Set the ID as PRIMARY KEY, not any other entity! This ID column by Google automatically increments every time a project is “uploaded”. Coooool.

<p>&lt;span style=&quot;background-color: #ffffff; &quot;&gt; @PrimaryKey&lt;/span&gt;</p>
<p>@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)</p>
<p>private Long id;</p>

@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Long id;

Written by Daniela

October 11, 2009 at 9:47 am

Posted in ProjectriX

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