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    <blockquote> <p>The property emailId is a foreign key referring to say emailId column in User table.</p> </blockquote> <p>Then don't add the <code>emailId</code> property, add a <code>User</code>.</p> <blockquote> <p>(...) How do i annotate this so that, whenever i fetch AppInput from db, the corresponding user details also get populated? </p> </blockquote> <p>Not sure since it could be a <code>ManyToOne</code> or <code>OneToOne</code> but I'll assume it's a <code>ManyToOne</code>:</p> <pre><code>@ManyToOne(fetch=FetchType.EAGER) @JoinColumn(name="USERDETAILS_EMAIL_ID", referencedColumnName="EMAIL_ID") private User userDetails; </code></pre> <p>The <code>fetch</code> annotation element is for demonstration purpose, <code>EAGER</code> being actually the default value. The <code>name</code> and <code>referencedColumn</code> annotation elements in <code>JoinColumn</code> are also optional. Below a short summary from the JPA specification:</p> <blockquote> <h3>11.1.21 JoinColumn Annotation</h3> <p>The <code>JoinColumn</code> annotation is used to specify a column for joining an entity association or element collection.</p> <p>Table 20 lists the annotation elements that may be specified for the <code>JoinColumn</code> annotation and their default values.</p> <p>If the <code>JoinColumn</code> annotation itself is defaulted, a single join column is assumed and the default values described in Table 20 apply.</p> <p>The <code>name</code> annotation element defines the name of the foreign key column. The remaining annotation elements (other than <code>referencedColumnName</code>) refer to this column and have the same semantics as for the <code>Column</code> annotation. </p> <p>If the <code>referencedColumnName</code> element is missing, the foreign key is assumed to refer to the primary key of the referenced table.</p> </blockquote> <p>See the <strong>Table 20</strong> in the spec for complete and exhaustive details.</p>
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    1. COYes it is a many to one. I tried the code and it says fetch is not a valid attribute.I tried removing it and it says "MappingException.Could not determine type for a.b.c.User"
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    2. CO@user378101: Little typo, `fetch` is an annotation element of `ManyToOne`. Regarding the second error, it seems `User` is not an entity (you need to annotate it with `@Entity` and to declare it in your `persistence.xml`). Only entities can be used in associations.
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    3. COI suspected this but the User class is already annotated with @Entity.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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