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| <h1 class="page">Bulk Load of Standalone Collections</h1> |
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| <p>The implementation of user interactions (meaning either an action invocations or a property edits) in the <a href="../../../vw/2.0.0-M3/about.html" class="page">Wicket viewer</a> is splits into two. |
| The first phase performs the actual interaction, with the results (dirtied objects) flushed to the database. |
| The second phase then renders the results of the interaction.</p> |
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| <p>When the user interaction in question is an action invocation that returns a list of objects, the resultant list is not rendered in the first phase. |
| Instead, only the IDs of the objects in the list are captured. |
| When the list is then rendered, the framework re-loads each object.</p> |
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| <p>The default implementation does this row-by-row, resulting in multiple queries against the database. |
| Setting the property:</p> |
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| <div class="listingblock"> |
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| <pre class="highlightjs highlight"><code class="language-ini hljs" data-lang="ini">isis.persistor.datanucleus.standaloneCollection.bulkLoad=true</code></pre> |
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| <p>changes to a more efficient implementation that bulk loads all the objects using a single query.</p> |
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| <p>In the future the bulkLoad implementation may be made the default.</p> |
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| <p>The implementation of parented collections does not suffer from this issue; the rendering phase runs the query to obtain the matches.</p> |
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