<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- qsqlrelationaltablemodel.cpp -->
<title>Qt 4.8: QSqlRelationalTableModel Class Reference</title>
<link rel="stylesheet" type="text/css" href="style/style.css" />
<script src="scripts/jquery.js" type="text/javascript"></script>
<script src="scripts/functions.js" type="text/javascript"></script>
<link rel="stylesheet" type="text/css" href="style/superfish.css" />
<link rel="stylesheet" type="text/css" href="style/narrow.css" />
<!--[if IE]>
<meta name="MSSmartTagsPreventParsing" content="true">
<meta http-equiv="imagetoolbar" content="no">
<![endif]-->
<!--[if lt IE 7]>
<link rel="stylesheet" type="text/css" href="style/style_ie6.css">
<![endif]-->
<!--[if IE 7]>
<link rel="stylesheet" type="text/css" href="style/style_ie7.css">
<![endif]-->
<!--[if IE 8]>
<link rel="stylesheet" type="text/css" href="style/style_ie8.css">
<![endif]-->
<script src="scripts/superfish.js" type="text/javascript"></script>
<script src="scripts/narrow.js" type="text/javascript"></script>
</head>
<body class="" onload="CheckEmptyAndLoadList();">
<div class="header" id="qtdocheader">
<div class="content">
<div id="nav-logo">
<a href="index.html">Home</a></div>
<a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
<div id="narrowsearch"></div>
<div id="nav-topright">
<ul>
<li class="nav-topright-home"><a href="http://qt.digia.com/">Qt HOME</a></li>
<li class="nav-topright-dev"><a href="http://qt-project.org/">DEV</a></li>
<li class="nav-topright-doc nav-topright-doc-active"><a href="http://qt-project.org/doc/">
DOC</a></li>
<li class="nav-topright-blog"><a href="http://blog.qt.digia.com/">BLOG</a></li>
</ul>
</div>
<div id="shortCut">
<ul>
<li class="shortCut-topleft-inactive"><span><a href="index.html">Qt 4.8</a></span></li>
<li class="shortCut-topleft-active"><a href="http://qt-project.org/doc/">ALL VERSIONS </a></li>
</ul>
</div>
<ul class="sf-menu" id="narrowmenu">
<li><a href="#">API Lookup</a>
<ul>
<li><a href="classes.html">Class index</a></li>
<li><a href="functions.html">Function index</a></li>
<li><a href="modules.html">Modules</a></li>
<li><a href="namespaces.html">Namespaces</a></li>
<li><a href="qtglobal.html">Global Declarations</a></li>
<li><a href="qdeclarativeelements.html">QML elements</a></li>
</ul>
</li>
<li><a href="#">Qt Topics</a>
<ul>
<li><a href="qt-basic-concepts.html">Programming with Qt</a></li>
<li><a href="qtquick.html">Device UIs & Qt Quick</a></li>
<li><a href="qt-gui-concepts.html">UI Design with Qt</a></li>
<li><a href="supported-platforms.html">Supported Platforms</a></li>
<li><a href="technology-apis.html">Qt and Key Technologies</a></li>
<li><a href="best-practices.html">How-To's and Best Practices</a></li>
</ul>
</li>
<li><a href="#">Examples</a>
<ul>
<li><a href="all-examples.html">Examples</a></li>
<li><a href="tutorials.html">Tutorials</a></li>
<li><a href="demos.html">Demos</a></li>
<li><a href="qdeclarativeexamples.html">QML Examples</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div class="wrapper">
<div class="hd">
<span></span>
</div>
<div class="bd group">
<div class="sidebar">
<div class="searchlabel">
Search index:</div>
<div class="search" id="sidebarsearch">
<form id="qtdocsearch" action="" onsubmit="return false;">
<fieldset>
<input type="text" name="searchstring" id="pageType" value="" />
<div id="resultdialog">
<a href="#" id="resultclose">Close</a>
<p id="resultlinks" class="all"><a href="#" id="showallresults">All</a> | <a href="#" id="showapiresults">API</a> | <a href="#" id="showarticleresults">Articles</a> | <a href="#" id="showexampleresults">Examples</a></p>
<p id="searchcount" class="all"><span id="resultcount"></span><span id="apicount"></span><span id="articlecount"></span><span id="examplecount"></span> results:</p>
<ul id="resultlist" class="all">
</ul>
</div>
</fieldset>
</form>
</div>
<div class="box first bottombar" id="lookup">
<h2 title="API Lookup"><span></span>
API Lookup</h2>
<div id="list001" class="list">
<ul id="ul001" >
<li class="defaultLink"><a href="classes.html">Class index</a></li>
<li class="defaultLink"><a href="functions.html">Function index</a></li>
<li class="defaultLink"><a href="modules.html">Modules</a></li>
<li class="defaultLink"><a href="namespaces.html">Namespaces</a></li>
<li class="defaultLink"><a href="qtglobal.html">Global Declarations</a></li>
<li class="defaultLink"><a href="qdeclarativeelements.html">QML elements</a></li>
</ul>
</div>
</div>
<div class="box bottombar" id="topics">
<h2 title="Qt Topics"><span></span>
Qt Topics</h2>
<div id="list002" class="list">
<ul id="ul002" >
<li class="defaultLink"><a href="qt-basic-concepts.html">Programming with Qt</a></li>
<li class="defaultLink"><a href="qtquick.html">Device UIs & Qt Quick</a></li>
<li class="defaultLink"><a href="qt-gui-concepts.html">UI Design with Qt</a></li>
<li class="defaultLink"><a href="supported-platforms.html">Supported Platforms</a></li>
<li class="defaultLink"><a href="technology-apis.html">Qt and Key Technologies</a></li>
<li class="defaultLink"><a href="best-practices.html">How-To's and Best Practices</a></li>
</ul>
</div>
</div>
<div class="box" id="examples">
<h2 title="Examples"><span></span>
Examples</h2>
<div id="list003" class="list">
<ul id="ul003">
<li class="defaultLink"><a href="all-examples.html">Examples</a></li>
<li class="defaultLink"><a href="tutorials.html">Tutorials</a></li>
<li class="defaultLink"><a href="demos.html">Demos</a></li>
<li class="defaultLink"><a href="qdeclarativeexamples.html">QML Examples</a></li>
</ul>
</div>
</div>
</div>
<div class="wrap">
<div class="toolbar">
<div class="breadcrumb toolblock">
<ul>
<li class="first"><a href="index.html">Home</a></li>
<!-- Breadcrumbs go here -->
<li><a href="modules.html">Modules</a></li>
<li><a href="qtsql.html">QtSql</a></li>
<li>QSqlRelationalTableModel</li>
</ul>
</div>
<div class="toolbuttons toolblock">
<ul>
<li id="smallA" class="t_button">A</li>
<li id="medA" class="t_button active">A</li>
<li id="bigA" class="t_button">A</li>
<li id="print" class="t_button"><a href="javascript:this.print();">
<span>Print</span></a></li>
</ul>
</div>
</div>
<div class="content mainContent">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#protected-functions">Protected Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
</ul>
</div>
<h1 class="title">QSqlRelationalTableModel Class Reference</h1>
<!-- $$$QSqlRelationalTableModel-brief -->
<p>The QSqlRelationalTableModel class provides an editable data model for a single database table, with foreign key support. <a href="#details">More...</a></p>
<!-- @@@QSqlRelationalTableModel -->
<pre class="cpp"> <span class="preprocessor">#include <QSqlRelationalTableModel></span></pre><p><b>Inherits: </b><a href="qsqltablemodel.html">QSqlTableModel</a>.</p>
<ul>
<li><a href="qsqlrelationaltablemodel-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-types"></a>
<h2>Public Types</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#JoinMode-enum">JoinMode</a></b> { InnerJoin, LeftJoin }</td></tr>
</table>
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#QSqlRelationalTableModel">QSqlRelationalTableModel</a></b> ( QObject * <i>parent</i> = 0, QSqlDatabase <i>db</i> = QSqlDatabase() )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#dtor.QSqlRelationalTableModel">~QSqlRelationalTableModel</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QSqlRelation </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#relation">relation</a></b> ( int <i>column</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QSqlTableModel * </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#relationModel">relationModel</a></b> ( int <i>column</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#setJoinMode">setJoinMode</a></b> ( QSqlRelationalTableModel::JoinMode <i>joinMode</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#setRelation">setRelation</a></b> ( int <i>column</i>, const QSqlRelation & <i>relation</i> )</td></tr>
</table>
<a name="reimplemented-public-functions"></a>
<h2>Reimplemented Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#clear">clear</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QVariant </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#data">data</a></b> ( const QModelIndex & <i>index</i>, int <i>role</i> = Qt::DisplayRole ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#removeColumns">removeColumns</a></b> ( int <i>column</i>, int <i>count</i>, const QModelIndex & <i>parent</i> = QModelIndex() )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#select">select</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#setData">setData</a></b> ( const QModelIndex & <i>index</i>, const QVariant & <i>value</i>, int <i>role</i> = Qt::EditRole )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#setTable">setTable</a></b> ( const QString & <i>table</i> )</td></tr>
</table>
<ul>
<li class="fn">25 public functions inherited from <a href="qsqltablemodel.html#public-functions">QSqlTableModel</a></li>
<li class="fn">16 public functions inherited from <a href="qsqlquerymodel.html#public-functions">QSqlQueryModel</a></li>
<li class="fn">2 public functions inherited from <a href="qabstracttablemodel.html#public-functions">QAbstractTableModel</a></li>
<li class="fn">35 public functions inherited from <a href="qabstractitemmodel.html#public-functions">QAbstractItemModel</a></li>
<li class="fn">29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
</ul>
<a name="public-slots"></a>
<h2>Public Slots</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#revertRow">revertRow</a></b> ( int <i>row</i> )</td></tr>
</table>
<ul>
<li class="fn">4 public slots inherited from <a href="qsqltablemodel.html#public-slots">QSqlTableModel</a></li>
<li class="fn">2 public slots inherited from <a href="qabstractitemmodel.html#public-slots">QAbstractItemModel</a></li>
<li class="fn">1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
</ul>
<a name="reimplemented-protected-functions"></a>
<h2>Reimplemented Protected Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#insertRowIntoTable">insertRowIntoTable</a></b> ( const QSqlRecord & <i>values</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QString </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#orderByClause">orderByClause</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QString </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#selectStatement">selectStatement</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaltablemodel.html#updateRowInTable">updateRowInTable</a></b> ( int <i>row</i>, const QSqlRecord & <i>values</i> )</td></tr>
</table>
<ul>
<li class="fn">8 protected functions inherited from <a href="qsqltablemodel.html#protected-functions">QSqlTableModel</a></li>
<li class="fn">3 protected functions inherited from <a href="qsqlquerymodel.html#protected-functions">QSqlQueryModel</a></li>
<li class="fn">21 protected functions inherited from <a href="qabstractitemmodel.html#protected-functions">QAbstractItemModel</a></li>
<li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li>
<li class="fn">4 signals inherited from <a href="qsqltablemodel.html#signals">QSqlTableModel</a></li>
<li class="fn">18 signals inherited from <a href="qabstractitemmodel.html#signals">QAbstractItemModel</a></li>
<li class="fn">1 signal inherited from <a href="qobject.html#signals">QObject</a></li>
<li class="fn">7 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
<li class="fn">8 protected functions inherited from <a href="qsqltablemodel.html#protected-functions">QSqlTableModel</a></li>
<li class="fn">3 protected functions inherited from <a href="qsqlquerymodel.html#protected-functions">QSqlQueryModel</a></li>
<li class="fn">21 protected functions inherited from <a href="qabstractitemmodel.html#protected-functions">QAbstractItemModel</a></li>
<li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
<li class="fn">1 protected slot inherited from <a href="qabstractitemmodel.html#protected-slots">QAbstractItemModel</a></li>
</ul>
<a name="details"></a>
<!-- $$$QSqlRelationalTableModel-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QSqlRelationalTableModel class provides an editable data model for a single database table, with foreign key support.</p>
<p>QSqlRelationalTableModel acts like <a href="qsqltablemodel.html">QSqlTableModel</a>, but allows columns to be set as foreign keys into other database tables.</p>
<table class="generic">
<tr valign="top" class="odd"><td ><img src="images/noforeignkeys.png" alt="" /></td><td ><img src="images/foreignkeys.png" alt="" /></td></tr>
</table>
<p>The screenshot on the left shows a plain <a href="qsqltablemodel.html">QSqlTableModel</a> in a <a href="qtableview.html">QTableView</a>. Foreign keys (<tt>city</tt> and <tt>country</tt>) aren't resolved to human-readable values. The screenshot on the right shows a QSqlRelationalTableModel, with foreign keys resolved into human-readable text strings.</p>
<p>The following code snippet shows how the QSqlRelationalTableModel was set up:</p>
<pre class="cpp"> model<span class="operator">-</span><span class="operator">></span>setTable(<span class="string">"employee"</span>);
model<span class="operator">-</span><span class="operator">></span>setRelation(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"city"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"name"</span>));
model<span class="operator">-</span><span class="operator">></span>setRelation(<span class="number">3</span><span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"country"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"name"</span>));</pre>
<p>The <a href="qsqlrelationaltablemodel.html#setRelation">setRelation</a>() function calls establish a relationship between two tables. The first call specifies that column 2 in table <tt>employee</tt> is a foreign key that maps with field <tt>id</tt> of table <tt>city</tt>, and that the view should present the <tt>city</tt>'s <tt>name</tt> field to the user. The second call does something similar with column 3.</p>
<p>If you use a read-write QSqlRelationalTableModel, you probably want to use <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> on the view. Unlike the default delegate, <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> provides a combobox for fields that are foreign keys into other tables. To use the class, simply call <a href="qabstractitemview.html#setItemDelegate">QAbstractItemView::setItemDelegate</a>() on the view with an instance of <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a>:</p>
<pre class="cpp"> <span class="type"><a href="qtableview.html">QTableView</a></span> <span class="operator">*</span>view <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtableview.html">QTableView</a></span>;
view<span class="operator">-</span><span class="operator">></span>setModel(model);
view<span class="operator">-</span><span class="operator">></span>setItemDelegate(<span class="keyword">new</span> <span class="type"><a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a></span>(view));</pre>
<p>The <a href="sql-relationaltablemodel.html">sql/relationaltablemodel</a> example illustrates how to use QSqlRelationalTableModel in conjunction with <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> to provide tables with foreign key support.</p>
<p class="centerAlign"><img src="images/relationaltable.png" alt="" /></p><p>Notes:</p>
<ul>
<li>The table must have a primary key declared.</li>
<li>The table's primary key may not contain a relation to another table.</li>
<li>If a relational table contains keys that refer to non-existent rows in the referenced table, the rows containing the invalid keys will not be exposed through the model. The user or the database is responsible for keeping referential integrity.</li>
<li>If a relation's display column name is also used as a column name in the main table, or if it is used as display column name in more than one relation it will be aliased. The alias is is the relation's table name and display column name joined by an underscore (e.g. tablename_columnname). All occurrences of the duplicate display column name are aliased when duplication is detected, but no aliasing is done to the column names in the main table. The aliasing doesn't affect <a href="qsqlrelation.html">QSqlRelation</a>, so <a href="qsqlrelation.html#displayColumn">QSqlRelation::displayColumn</a>() will return the original display column name, but <a href="qsqlrecord.html#fieldName">QSqlRecord::fieldName</a>() will return aliases.</li>
<li>When using <a href="qsqlrelationaltablemodel.html#setData">setData</a>() the role should always be <a href="qt.html#ItemDataRole-enum">Qt::EditRole</a>, and when using <a href="qsqlrelationaltablemodel.html#data">data</a>() the role should always be <a href="qt.html#ItemDataRole-enum">Qt::DisplayRole</a>.</li>
</ul>
</div>
<p><b>See also </b><a href="qsqlrelation.html">QSqlRelation</a>, <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a>, and <a href="sql-relationaltablemodel.html">Relational Table Model Example</a>.</p>
<!-- @@@QSqlRelationalTableModel -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$JoinMode$$$InnerJoin$$$LeftJoin -->
<h3 class="fn"><a name="JoinMode-enum"></a>enum QSqlRelationalTableModel::<span class="name">JoinMode</span></h3>
<p>This enum specifies the type of mode to use when joining two tables.</p>
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><tt>QSqlRelationalTableModel::InnerJoin</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">Inner join mode, return rows when there is at least one match in both tables.</td></tr>
<tr><td class="topAlign"><tt>QSqlRelationalTableModel::LeftJoin</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">Left join mode, returns all rows from the left table (table_name1), even if there are no matches in the right table (table_name2).</td></tr>
</table>
<p>This enum was introduced or modified in Qt 4.8.</p>
<p><b>See also </b><a href="qsqlrelationaltablemodel.html#setJoinMode">QSqlRelationalTableModel::setJoinMode</a>().</p>
<!-- @@@JoinMode -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QSqlRelationalTableModel[overload1]$$$QSqlRelationalTableModelQObject*QSqlDatabase -->
<h3 class="fn"><a name="QSqlRelationalTableModel"></a>QSqlRelationalTableModel::<span class="name">QSqlRelationalTableModel</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>parent</i> = 0, <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span> <i>db</i> = QSqlDatabase() )</h3>
<p>Creates an empty <a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a> and sets the parent to <i>parent</i> and the database connection to <i>db</i>. If <i>db</i> is not valid, the default database connection will be used.</p>
<!-- @@@QSqlRelationalTableModel -->
<!-- $$$~QSqlRelationalTableModel[overload1]$$$~QSqlRelationalTableModel -->
<h3 class="fn"><a name="dtor.QSqlRelationalTableModel"></a>QSqlRelationalTableModel::<span class="name">~QSqlRelationalTableModel</span> ()<tt> [virtual]</tt></h3>
<p>Destroys the object and frees any allocated resources.</p>
<!-- @@@~QSqlRelationalTableModel -->
<!-- $$$clear[overload1]$$$clear -->
<h3 class="fn"><a name="clear"></a><span class="type">void</span> QSqlRelationalTableModel::<span class="name">clear</span> ()<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qsqlquerymodel.html#clear">QSqlQueryModel::clear</a>().</p>
<!-- @@@clear -->
<!-- $$$data[overload1]$$$dataconstQModelIndex&int -->
<h3 class="fn"><a name="data"></a><span class="type"><a href="qvariant.html">QVariant</a></span> QSqlRelationalTableModel::<span class="name">data</span> ( const <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> & <i>index</i>, <span class="type">int</span> <i>role</i> = Qt::DisplayRole ) const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#data">QAbstractItemModel::data</a>().</p>
<p><b>See also </b><a href="qsqlrelationaltablemodel.html#setData">setData</a>().</p>
<!-- @@@data -->
<!-- $$$insertRowIntoTable[overload1]$$$insertRowIntoTableconstQSqlRecord& -->
<h3 class="fn"><a name="insertRowIntoTable"></a><span class="type">bool</span> QSqlRelationalTableModel::<span class="name">insertRowIntoTable</span> ( const <span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> & <i>values</i> )<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qsqltablemodel.html#insertRowIntoTable">QSqlTableModel::insertRowIntoTable</a>().</p>
<!-- @@@insertRowIntoTable -->
<!-- $$$orderByClause[overload1]$$$orderByClause -->
<h3 class="fn"><a name="orderByClause"></a><span class="type"><a href="qstring.html">QString</a></span> QSqlRelationalTableModel::<span class="name">orderByClause</span> () const<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qsqltablemodel.html#orderByClause">QSqlTableModel::orderByClause</a>().</p>
<!-- @@@orderByClause -->
<!-- $$$relation[overload1]$$$relationint -->
<h3 class="fn"><a name="relation"></a><span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span> QSqlRelationalTableModel::<span class="name">relation</span> ( <span class="type">int</span> <i>column</i> ) const</h3>
<p>Returns the relation for the column <i>column</i>, or an invalid relation if no relation is set.</p>
<p><b>See also </b><a href="qsqlrelationaltablemodel.html#setRelation">setRelation</a>() and <a href="qsqlrelation.html#isValid">QSqlRelation::isValid</a>().</p>
<!-- @@@relation -->
<!-- $$$relationModel[overload1]$$$relationModelint -->
<h3 class="fn"><a name="relationModel"></a><span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> * QSqlRelationalTableModel::<span class="name">relationModel</span> ( <span class="type">int</span> <i>column</i> ) const<tt> [virtual]</tt></h3>
<p>Returns a <a href="qsqltablemodel.html">QSqlTableModel</a> object for accessing the table for which <i>column</i> is a foreign key, or 0 if there is no relation for the given <i>column</i>.</p>
<p>The returned object is owned by the <a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a>.</p>
<p><b>See also </b><a href="qsqlrelationaltablemodel.html#setRelation">setRelation</a>() and <a href="qsqlrelationaltablemodel.html#relation">relation</a>().</p>
<!-- @@@relationModel -->
<!-- $$$removeColumns[overload1]$$$removeColumnsintintconstQModelIndex& -->
<h3 class="fn"><a name="removeColumns"></a><span class="type">bool</span> QSqlRelationalTableModel::<span class="name">removeColumns</span> ( <span class="type">int</span> <i>column</i>, <span class="type">int</span> <i>count</i>, const <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> & <i>parent</i> = QModelIndex() )<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#removeColumns">QAbstractItemModel::removeColumns</a>().</p>
<!-- @@@removeColumns -->
<!-- $$$revertRow[overload1]$$$revertRowint -->
<h3 class="fn"><a name="revertRow"></a><span class="type">void</span> QSqlRelationalTableModel::<span class="name">revertRow</span> ( <span class="type">int</span> <i>row</i> )<tt> [virtual slot]</tt></h3>
<p>Reimplemented from <a href="qsqltablemodel.html#revertRow">QSqlTableModel::revertRow</a>().</p>
<!-- @@@revertRow -->
<!-- $$$select[overload1]$$$select -->
<h3 class="fn"><a name="select"></a><span class="type">bool</span> QSqlRelationalTableModel::<span class="name">select</span> ()<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qsqltablemodel.html#select">QSqlTableModel::select</a>().</p>
<!-- @@@select -->
<!-- $$$selectStatement[overload1]$$$selectStatement -->
<h3 class="fn"><a name="selectStatement"></a><span class="type"><a href="qstring.html">QString</a></span> QSqlRelationalTableModel::<span class="name">selectStatement</span> () const<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qsqltablemodel.html#selectStatement">QSqlTableModel::selectStatement</a>().</p>
<!-- @@@selectStatement -->
<!-- $$$setData[overload1]$$$setDataconstQModelIndex&constQVariant&int -->
<h3 class="fn"><a name="setData"></a><span class="type">bool</span> QSqlRelationalTableModel::<span class="name">setData</span> ( const <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> & <i>index</i>, const <span class="type"><a href="qvariant.html">QVariant</a></span> & <i>value</i>, <span class="type">int</span> <i>role</i> = Qt::EditRole )<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#setData">QAbstractItemModel::setData</a>().</p>
<p>Sets the data for the <i>role</i> in the item with the specified <i>index</i> to the <i>value</i> given. Depending on the edit strategy, the value might be applied to the database at once, or it may be cached in the model.</p>
<p>Returns true if the value could be set, or false on error (for example, if <i>index</i> is out of bounds).</p>
<p>For relational columns, <i>value</i> must be the index, not the display value. The index must also exist in the referenced table, otherwise the function returns false.</p>
<p><b>See also </b><a href="qsqltablemodel.html#editStrategy">editStrategy</a>(), <a href="qsqlrelationaltablemodel.html#data">data</a>(), <a href="qsqltablemodel.html#submit">submit</a>(), and <a href="qsqlrelationaltablemodel.html#revertRow">revertRow</a>().</p>
<!-- @@@setData -->
<!-- $$$setJoinMode[overload1]$$$setJoinModeQSqlRelationalTableModel::JoinMode -->
<h3 class="fn"><a name="setJoinMode"></a><span class="type">void</span> QSqlRelationalTableModel::<span class="name">setJoinMode</span> ( <span class="type"><a href="qsqlrelationaltablemodel.html#JoinMode-enum">QSqlRelationalTableModel::JoinMode</a></span> <i>joinMode</i> )</h3>
<p>Sets the SQL join mode to the value given by <i>joinMode</i> to show or hide rows with NULL foreign keys.</p>
<p>In <a href="qsqlrelationaltablemodel.html#JoinMode-enum">InnerJoin</a> mode (the default) these rows will not be shown; use the <a href="qsqlrelationaltablemodel.html#JoinMode-enum">LeftJoin</a> mode if you want to show them.</p>
<p>This function was introduced in Qt 4.8.</p>
<p><b>See also </b><a href="qsqlrelationaltablemodel.html#JoinMode-enum">QSqlRelationalTableModel::JoinMode</a>.</p>
<!-- @@@setJoinMode -->
<!-- $$$setRelation[overload1]$$$setRelationintconstQSqlRelation& -->
<h3 class="fn"><a name="setRelation"></a><span class="type">void</span> QSqlRelationalTableModel::<span class="name">setRelation</span> ( <span class="type">int</span> <i>column</i>, const <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span> & <i>relation</i> )<tt> [virtual]</tt></h3>
<p>Lets the specified <i>column</i> be a foreign index specified by <i>relation</i>.</p>
<p>Example:</p>
<pre class="cpp"> model<span class="operator">-</span><span class="operator">></span>setTable(<span class="string">"employee"</span>);
model<span class="operator">-</span><span class="operator">></span>setRelation(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"city"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"name"</span>));</pre>
<p>The setRelation() call specifies that column 2 in table <tt>employee</tt> is a foreign key that maps with field <tt>id</tt> of table <tt>city</tt>, and that the view should present the <tt>city</tt>'s <tt>name</tt> field to the user.</p>
<p>Note: The table's primary key may not contain a relation to another table.</p>
<p><b>See also </b><a href="qsqlrelationaltablemodel.html#relation">relation</a>().</p>
<!-- @@@setRelation -->
<!-- $$$setTable[overload1]$$$setTableconstQString& -->
<h3 class="fn"><a name="setTable"></a><span class="type">void</span> QSqlRelationalTableModel::<span class="name">setTable</span> ( const <span class="type"><a href="qstring.html">QString</a></span> & <i>table</i> )<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qsqltablemodel.html#setTable">QSqlTableModel::setTable</a>().</p>
<!-- @@@setTable -->
<!-- $$$updateRowInTable[overload1]$$$updateRowInTableintconstQSqlRecord& -->
<h3 class="fn"><a name="updateRowInTable"></a><span class="type">bool</span> QSqlRelationalTableModel::<span class="name">updateRowInTable</span> ( <span class="type">int</span> <i>row</i>, const <span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> & <i>values</i> )<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qsqltablemodel.html#updateRowInTable">QSqlTableModel::updateRowInTable</a>().</p>
<!-- @@@updateRowInTable -->
</div>
</div>
</div>
</div>
<div class="ft">
<span></span>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its
subsidiaries. Documentation contributions included herein are the copyrights of
their respective owners.</p>
<br />
<p>
The documentation provided herein is licensed under the terms of the
<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
License version 1.3</a> as published by the Free Software Foundation.</p>
<p>
Documentation sources may be obtained from <a href="http://www.qt-project.org">
www.qt-project.org</a>.</p>
<br />
<p>
Digia, Qt and their respective logos are trademarks of Digia Plc
in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. <a title="Privacy Policy"
href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
</div>
<script src="scripts/functions.js" type="text/javascript"></script>
</body>
</html>
