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<td class="page-title-pattern-first-line " style="padding: 0px; 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-9652" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-3eef92b3-8940-4a61-a86a-578dc5864c71" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-9652" style="color: #3b73af; text-decoration: none">HHH-9652</a>
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Issue Type:
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<td class="has-icon" style="padding: 0px; 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-bug-3eef92b3-8940-4a61-a86a-578dc5864c71" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /> Bug
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Affects Versions:
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4.3.8
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Assignee:
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Unassigned
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Components:
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core, entity-manager
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Created:
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09/Mar/2015 08:33 AM
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Environment:
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H2 In-Memory DB, as used in the Hibernate Test Suite itself
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Priority:
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="Bastian U" id="email_Bastian U" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=Bastian+U" style="color:#6c797f;; color: #3b73af; text-decoration: none">Bastian Ulke</a>
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Original Estimate:
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6h
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Remaining Estimate:
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6h
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I encountered some inconsistent behaviour of meta data validation, processed during EntityManager construction which is related to the specification of bidirectional associations. <br /> Consider following code, consisting of a 1:n-relationship between Department and Employee and a 1:1-relationship between Employee and SystemAccount.</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
<span class="code-keyword" style="color: #000091">public</span> class Department {
@OneToMany(mappedBy = <span class="code-quote" style="color: #009100">"department"</span>)
<span class="code-keyword" style="color: #000091">private</span> Set<Employee> employees;
}
@Entity
<span class="code-keyword" style="color: #000091">public</span> class Employee {
@ManyToOne
<span class="code-keyword" style="color: #000091">private</span> Department department;
@ManyToMany
<span class="code-keyword" style="color: #000091">private</span> Set<Skill> skills;
@OneToOne
<span class="code-keyword" style="color: #000091">private</span> SystemAccount account;
}
@Entity
<span class="code-keyword" style="color: #000091">public</span> class SystemAccount {
@OneToOne(mappedBy = <span class="code-quote" style="color: #009100">"account"</span>)
<span class="code-keyword" style="color: #000091">private</span> Employee employee;
}
@Entity
<span class="code-keyword" style="color: #000091">public</span> class Skill {
}
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">We agree that the associations specified are valid, right?</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Let's now change the mappedBy attribute of the @OneToOne annotation of SystemAccount.employee from "account" to "skills". Apart from the fact that the referred entity's types are inconsistent, the EM construction throws the following exception:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Unable to build Hibernate SessionFactory: Referenced property not a (One|Many)ToOne: p.Employee.skills in mappedBy of p.SystemAccount.employee
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I am very happy with this message, since the inverse side of a @OneToOne association should be a @OneToOne association or at most a @ManyToOne association.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Instead of this change, let's now change the mappedBy-attribute of the @OneToMany association of Department.employees from "department" to "skills". From my point of view, the situation is very similar to the first change: We have a mappedBy-attribute of a @OneTo... association end referring to a field, annotated with one of the @...ToMany associations. However, the entity manager can be constructed successfully without throwing any exception or warning.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Running through the 12 possible constellations, I get the following results (The lines representing a field having the specified annotation including a mappedBy attribute, the columns representing the annotation of the targeted field):</p>
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<th class="confluenceTh" style="border: 1px solid #ccc; background: #f5f5f5; padding: 3px 4px 3px 4px; text-align: center; font: bold 14px/20px Arial, sans-serif">
@OneToOne
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<th class="confluenceTh" style="border: 1px solid #ccc; background: #f5f5f5; padding: 3px 4px 3px 4px; text-align: center; font: bold 14px/20px Arial, sans-serif">
@ManyToOne
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<th class="confluenceTh" style="border: 1px solid #ccc; background: #f5f5f5; padding: 3px 4px 3px 4px; text-align: center; font: bold 14px/20px Arial, sans-serif">
@OneToMany
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<th class="confluenceTh" style="border: 1px solid #ccc; background: #f5f5f5; padding: 3px 4px 3px 4px; text-align: center; font: bold 14px/20px Arial, sans-serif">
@ManyToMany
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</th>
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<th class="confluenceTh" style="border: 1px solid #ccc; background: #f5f5f5; padding: 3px 4px 3px 4px; text-align: center; font: bold 14px/20px Arial, sans-serif">
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
@OneToOne
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
OK
</td>
<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
OK
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
rejected
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
rejected
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
@OneToMany
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
OK
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
OK
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif"> <font color="red">not rejected</font>
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif"> <font color="red">not rejected</font>
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@ManyToMany
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif"> <font color="red">not rejected</font>
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif"> <font color="red">not rejected</font>
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
OK
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<td class="confluenceTd" style="padding: 0px; border-collapse: collapse; border: 1px solid #ccc; padding: 3px 4px 3px 4px; font: normal 14px/20px Arial, sans-serif">
OK
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">There are four cases which, from my point of view, should be rejected but which are accepted by Hibernate. Is there a reason for this?</p>
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