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diff --git a/jpa/plugins/org.eclipse.jpt.doc.user/getting_started017.htm b/jpa/plugins/org.eclipse.jpt.doc.user/getting_started017.htm new file mode 100644 index 0000000000..b32513556c --- /dev/null +++ b/jpa/plugins/org.eclipse.jpt.doc.user/getting_started017.htm @@ -0,0 +1,71 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> +<head> +<!-- Run date = May 3, 2007 9:19:08 --> +<meta name="OAC_IGNORE_SKIP_NAV" content="true" /> +<title>Create one-to-many mappings</title> +<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> +<meta http-equiv="Content-Style-Type" content="text/css" /> +<meta http-equiv="Content-Script-Type" content="text/javascript" /> +<meta name="generator" content="Oracle DARB XHTML Converter - Version 4.5.3 Build 02" /> +<meta name="date" content="2005-07-10T12:57:20+08:00" /> +<meta name="robots" content="all" scheme="http://www.robotstxt.org/" /> +<meta name="doctitle" content="Create one-to-many mappings" /> +<meta name="relnum" content="Release 1.0.0" /> +<meta name="partnum" content="" /> +<link rel="copyright" href="dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> +<link rel="stylesheet" href="dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> +<link rel="start" href="../../index.htm" title="Home" type="text/html" /> +<link rel="contents" href="toc.htm" title="Contents" type="text/html" /> +</head> +<body> +<p><a id="BABBEHEG" name="BABBEHEG"></a></p> +<div class="sect3"><!-- infolevel="all" infotype="General" --> +<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> +<tr valign="bottom"> +<td align="left" width="86%"> +<h1>Create one-to-many mappings</h1> +</td> +</tr> +</table> +<p>Use a <span class="bold">One-to-Many Mapping</span> to define a relationship from an attribute to another class, with one-to-many multiplicity to a database column. In the <a href="getting_started006.htm#BABIDCBA">Tutorial Object Model</a>, the <span class="bold">phoneNumbers</span> field of the <span class="bold">Employee</span> class has a one-to-many relationship to the <span class="bold">Phone</span> class; each employee may have many phone numbers.</p> +<ol type="1" start="1"> +<li> +<p>Select the <span class="bold">Employee</span> entity in the Package Explorer view.</p> +</li> +<li> +<p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, select the <span class="bold">phoneNumber</span> field of the <span class="bold">Employee</span> entity. The <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> displays the properties for the field.</p> +</li> +<li> +<p>In the <span class="gui-object-title">Map As</span> field, select <span class="gui-object-action">One-to-Many</span>.</p> +<div class="figure"><a id="sthref35" name="sthref35"></a> +<p class="titleinfigure">One-to-many Mapping for phoneNumbers</p> +<img src="img/persistence_view_onetomany.png" alt="This figure shows the Persistence Properties page for the phoneNumbers field." title="This figure shows the Persistence Properties page for the phoneNumbers field." /><br /></div> +<!-- class="figure" --></li> +<li> +<p>Select <span class="bold">PhoneNumber</span> as the Target Entity. Leave the other fields with their default values.</p> +</li> +<li> +<p>In the Join Table area, notice that Dali has selected the correct joins, based on the foreign key associations in the database tables.</p> +</li> +</ol> +<p>In the JPA Structure, the <span class="bold">phoneNumbers</span> field is identified as a one-to-many mapping as shown in the following figure:</p> +<div class="figure"><a id="sthref36" name="sthref36"></a> +<p class="titleinfigure">JPA Structure for Employee Entity</p> +<img src="img/persistence_outline_phone.png" alt="This figure shows the phoneNumbers attribute of the Employee entity in the Persistence Outline view." title="This figure shows the phoneNumbers attribute of the Employee entity in the Persistence Outline view." /><br /></div> +<!-- class="figure" --> +<p>Next, you will <a href="getting_started018.htm#BABCHIHI">Create many-to-one mappings</a>.</p> +</div> +<!-- class="sect3" --> +<!-- Start Footer --> +<div class="footer"> +<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> +<tr> +<td align="left" width="86%"><a href="dcommon/html/cpyr.htm"><span class="copyrightlogo">Copyright © 2006, 2007, Oracle. All rights reserved.</span></a></td> +</tr> +</table> +</div> +<!-- class="footer" --> +</body> +</html> |