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    <p>Update: According to the <a href="https://code.google.com/p/googleappengine/issues/detail?id=9634" rel="nofollow">GAE issue tracker</a>, this has been fixed in version 1.9.7. For earlier versions, see below.</p> <hr> <p>Hibernate Validator 5.x makes use of the <a href="https://docs.jboss.org/hibernate/stable/validator/reference/en-US/html_single/#validator-gettingstarted-uel" rel="nofollow">Unified Expression Language</a>. In particular, it uses a static API method that looks up an implementation of <code>ExpressionFactory</code>. A <a href="https://code.google.com/p/googleappengine/issues/detail?id=9634" rel="nofollow">bug</a> in App Engine 1.9.4 and earlier, however, seems to prevent the use of any expression factory implementation <strong>in production only</strong>.</p> <p>Until this is fixed, there are two workarounds:</p> <ol> <li><p>If you don't need the Bean Validation 1.1 features, fall back to Hibernate Validator 4.3.1.Final. I have successfully tested this.</p> <pre><code>&lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate-validator&lt;/artifactId&gt; &lt;version&gt;4.3.1.Final&lt;/version&gt; &lt;/dependency&gt; </code></pre></li> <li><p>If you need Bean Validation 1.1, there have been <a href="https://code.google.com/p/googleappengine/issues/detail?id=9634#c13" rel="nofollow">reports</a> to make this work with a repository snapshot of Apache BVal. I haven't tested this.</p></li> </ol> <hr> <p>Update note: Specifying the expression language implementation as stated in my earlier response (Glassfish EL or JUEL) works fine in development and also in certain production use cases, but will still fail for some validations.</p>
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    1. POApp Engine: jar in WEB-INF/lib but still getting java.lang.ClassNotFoundException
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    1. USDavid Geiger
    1. USDavid Geiger
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    1. COThanks, David. However, I had tried both of those options already - the jar mentioned in the question is the snapshot jar that should work on GAE. The strange thing was that both solutions worked on my dev server, but neither worked for me on GAE. Thankfully, BVal was a suitable replacement and included the same @Email tag as Hibernate.
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      1. USsbsmith
    2. COIf you go for using the Glassfish reference implementation you only need the glassfish dep. In that case the javax.el:javax.el-api dep is not needed.
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      1. USMarcel Overdijk
 

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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