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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-10260" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-b4dfb3f3-dc3d-4f6b-a769-8ed4ab6ebd0d" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-10260" style="color: #3b73af; text-decoration: none">HHH-10260</a>
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<td style="vertical-align: top;; padding: 0px; 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-10260" style="color: #3b73af; text-decoration: none">Many-To-Many Relation RepeatedColumn error</a> </span>
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hibernate-core
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05/Nov/2015 14:56 PM
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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="sdinasa" id="email_sdinasa" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=sdinasa" style="color:#6c797f;; color: #3b73af; text-decoration: none">srujana</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I have three tables like this<br /> Table1 Student<br /> DepID --pk<br /> StudentID --pk<br /> StudentName<br /> StudentEmail</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Table 2 LinkStudentCourses<br /> DepID--pk<br /> StudentID--pk<br /> CourseID--pk</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Table3 Courses<br /> 1.DepID--pk<br /> 2.CourseID--pk<br /> 3.CourseName<br /> 4.CourseLevel</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">My requirement is to get all the courses enrolled by student, I mean getting all the corresponding data from courses table based on studentID form student table</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">So my approach here is using many-to-many relation<br /> I have three different classes and xml mappings<br /> here is how I linked them through many-to many in Student xml file</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><class name="com.syn.model.Student" table="Student" entity-name="student_courses"><br /> <composite-id name="id" class="com.syn.model.StudentId"><br /> <key-property name = "depID" column="DepID" /><br /> <key-property name = "studentID" column="StudentID" /> <br /> </composite-id><br /> <property name="studentName" column="StudentName" /><br /> <property name="studentEmail" column="StudentEmail" /> <br /> <set name="studentCourses" table="LinkStudentCourses" inverse="true"><br /> <key not-null="true" update="false" ><br /> <column name="DepID" /><br /> <column name="StudentID" /><br /> </key><br /> <many-to-many entity-name="courses"><br /> <column name="DepID" /> <br /> <column name="CourseID" /><br /> </many-to-many><br /> </set> <br /> </class> </p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Here is the LinkStudentCourses xml mapping</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><class name="com.syn.model.LinkStudentCourses" table="LinkStudentCourses" entity-name="link_student_courses"><br /> <composite-id name="id" class="com.syn.model.LinkStudentCoursesId"><br /> <key-property name = "depID" column="DepID" /><br /> <key-property name = "studentID" column="StudentID" /> <br /> <key-property name = "courseID" column="CourseID" /><br /> </composite-id><br /> </class> </p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Here is the Course table hbm</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><class name="com.syn.model.Courses" table="Courses" entity-name="courses"><br /> <composite-id name="id" class="com.syn.model.CoursesId"><br /> <key-property name = "depID" column="DepID" /><br /> <key-property name = "courseID" column="CourseID" /><br /> </composite-id><br /> <property name="courseName" column="CourseName" /><br /> <property name="courseLevel" column="CourseLevel" /> <br /> </class> </p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">here is the error tomcat throwing when I run this<br /> Repeated column in mapping for collection: student_courses.courses column: DepID</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">How can I solve this problem...</p>
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