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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HSEARCH" style="color: #3b73af; text-decoration: none">Hibernate Search</a> / <a href="https://hibernate.atlassian.net/browse/HSEARCH-2448" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-689c03da-a6e0-45df-a3ed-c53e3afeb8a3" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-2448" style="color: #3b73af; text-decoration: none">HSEARCH-2448</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-2448" style="color: #3b73af; text-decoration: none">Throw exception with clear messages when there are field type conflicts with Elasticsearch</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-689c03da-a6e0-45df-a3ed-c53e3afeb8a3" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"> Improvement </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.6.0.Beta3 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> elasticsearch </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 03/Nov/2016 07:57 AM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Fix Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.6.0.CR1 </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-a94f359d-3c32-4dcd-831f-606bc0c8ffc7" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="yrodiere" id="email_yrodiere" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=yrodiere" style="color:#6c797f;; color: #3b73af; text-decoration: none">Yoann Rodière</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">With the Lucene backend, we used to allow using a specific path as both a composite object and a concrete object (string, long, etc). For instance, if we have something like this:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
myComposite.leaf=foo
myComposite=bar
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Then <tt>myComposite</tt> may hold both a concrete value ("bar") <b>and</b> sub-fields (<tt>myComposite.leaf</tt>).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">A concrete case when this could happen is when you have a property annotated with both <tt>@Field</tt> and <tt>@IndexedEmbedded</tt>:</p>
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@IndexedEmbedded(prefix = <span class="code-quote" style="color: #009100">"myComposite."</span>)
@Field(name = <span class="code-quote" style="color: #009100">"myComposite"</span>)
<span class="code-keyword" style="color: #000091">private</span> MyComposite myComposite;
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This works alright with Lucene, because there is no such thing as a composite object: the data is flattened and stored as a big bag of key/value pairs.<br> But with Elasticsearch, this is not the case, at least not when interacting through the APIs: composite object have dedicated types (the <tt>object</tt> and <tt>nested</tt> datatypes), and those do not allow storing concrete values (only sub-fields).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Currently though, we do not check for such cases, and when an error happens, it's rather cryptic because it comes from Elasticsearch and does not have much context.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">We should make sure that we throw clear exceptions:</p>
<ul>
<li>when generating the mapping, we should throw an exception with a clear message when an ES property has multiple types (object and something else). Currently, the last encountered wins, and we may end up with properties with the <tt>long</tt> datatype (for instance) that also have their own properties, which will make ES cry.</li>
<li>when mapping generation is disabled, we should make sure to throw an exception anyway. We may do this at runtime (when using conflicting fields in projections, sorts or queries) or when boostrapping, whichever is easier.</li>
</ul> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The limitations have already been documented as part of <span class="jira-issue-macro" data-jira-key="HSEARCH-2396">
<!-- replace the span with an AUI template --> <a href="https://hibernate.atlassian.net/browse/HSEARCH-2396" class="jira-issue-macro-key issue-link" title="Support custom field bridges with the Elasticsearch backend (for EmbeddedIds for instance)" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12151&avatarType=issuetype"> HSEARCH-2396 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-current jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Pull Request Sent</span> </span> .</p> </td>
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