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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/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-12458" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-bb7d50b4-c270-44c9-a847-45e6a3aa50b3" height="16" width="16" border="0" align="absmiddle" alt="New Feature" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-12458" style="color: #3b73af; text-decoration: none">HHH-12458</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/HHH-12458" style="color: #3b73af; text-decoration: none">Use a SuperClass as target entity in a @OneToMany relationship</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-bb7d50b4-c270-44c9-a847-45e6a3aa50b3" height="16" width="16" border="0" align="absmiddle" alt="New Feature" style="vertical-align: text-bottom"> New Feature </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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<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"> 04/Apr/2018 00:19 AM </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-954a5c08-a272-4973-8d66-f4e23e148535" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </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"> <a class="user-hover" rel="alex.tomasello" id="email_alex.tomasello" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=alex.tomasello" style="color:#6c797f;; color: #3b73af; text-decoration: none">Alex Tomasello</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">HI there, <br> supposing to have an abstract SuperClass, with a single table inheritance, like this:</p>
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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">
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorFormula(<span class="code-quote" style="color: #009100">"..."</span>)
@Table(name = <span class="code-quote" style="color: #009100">"groups"</span>)
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">abstract</span> <span class="code-keyword" style="color: #000091">class </span>AbstractGroup<H <span class="code-keyword" style="color: #000091">extends</span> AbstractGroup<H>> <span class="code-keyword" style="color: #000091">implements</span> Serializable {
@ManyToOne
@JoinColumn(name = <span class="code-quote" style="color: #009100">"parent_groupid"</span>, referencedColumnName = <span class="code-quote" style="color: #009100">"groupid"</span>)
<span class="code-keyword" style="color: #000091">private</span> H parent;
}
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">You can receive this error message:</p>
<div class="preformatted 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">
<div class="preformattedContent panelContent" style="padding: 9px 12px">
<pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">Property entity.AbstractGroup.parent has an unbound type and no explicit target entity. Resolve this Generic usage issue or set an explicit target attribute (eg @OneToMany(target=) or use an explicit @Type.
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I think that you could accept target type as an instance of AbstractGroup, because you're using inheritance on a single table, so you could know which is the right class.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">What do you think about this?</p> </td>
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