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<div class="header">
  <div class="summary">
<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="class_transaction-members.htm">List of all members</a>  </div>
  <div class="headertitle">
<div class="title">Transaction Class Reference</div>  </div>
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<p>QSqlDatabase transaction wrapper.  
 <a href="class_transaction.htm#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="_easy_qt_sql___transaction_8h_source.htm">EasyQtSql_Transaction.h</a>&gt;</code></p>
<div class="dynheader">
Inheritance diagram for Transaction:</div>
<div class="dyncontent">
 <div class="center">
  <img src="class_transaction.png" usemap="#Transaction_map" alt=""/>
  <map id="Transaction_map" name="Transaction_map">
<area href="class_database.htm" title="QSqlDatabase wrapper. " alt="Database" shape="rect" coords="0,0,78,24"/>
</map>
 </div></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a9fed08d5643b66471a6e9fc75f351117"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a9fed08d5643b66471a6e9fc75f351117">Transaction</a> (const QSqlDatabase &amp;db=QSqlDatabase())</td></tr>
<tr class="separator:a9fed08d5643b66471a6e9fc75f351117"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a25916a5c0268d3b24a1fe17acf49fd95"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a25916a5c0268d3b24a1fe17acf49fd95">Transaction</a> (<a class="el" href="class_transaction.htm">Transaction</a> &amp;&amp;other)</td></tr>
<tr class="separator:a25916a5c0268d3b24a1fe17acf49fd95"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a384204be2d6c76f7f6d20d612f487e71"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_transaction.htm">Transaction</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a384204be2d6c76f7f6d20d612f487e71">operator=</a> (<a class="el" href="class_transaction.htm">Transaction</a> &amp;&amp;other)</td></tr>
<tr class="separator:a384204be2d6c76f7f6d20d612f487e71"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a362b0d2524d0c799165190517192dca9"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a362b0d2524d0c799165190517192dca9">~Transaction</a> ()</td></tr>
<tr class="separator:a362b0d2524d0c799165190517192dca9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7388031cba0416d48e03e3f7acd5ca6a"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a7388031cba0416d48e03e3f7acd5ca6a">commit</a> ()</td></tr>
<tr class="memdesc:a7388031cba0416d48e03e3f7acd5ca6a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Commits transaction.  <a href="#a7388031cba0416d48e03e3f7acd5ca6a">More...</a><br /></td></tr>
<tr class="separator:a7388031cba0416d48e03e3f7acd5ca6a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a01e20e050a9ee2ba3eecf1b5ed57e2eb"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a01e20e050a9ee2ba3eecf1b5ed57e2eb">rollback</a> ()</td></tr>
<tr class="memdesc:a01e20e050a9ee2ba3eecf1b5ed57e2eb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Rolls back transaction.  <a href="#a01e20e050a9ee2ba3eecf1b5ed57e2eb">More...</a><br /></td></tr>
<tr class="separator:a01e20e050a9ee2ba3eecf1b5ed57e2eb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a53d4633727d54be34b7af5d68e7ef0ac"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a53d4633727d54be34b7af5d68e7ef0ac">started</a> () const</td></tr>
<tr class="memdesc:a53d4633727d54be34b7af5d68e7ef0ac"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if the transaction has been started successfully. Otherwise it returns false.  <a href="#a53d4633727d54be34b7af5d68e7ef0ac">More...</a><br /></td></tr>
<tr class="separator:a53d4633727d54be34b7af5d68e7ef0ac"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a87b55e002c7d1b8b2d912c6714a88576"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_transaction.htm#a87b55e002c7d1b8b2d912c6714a88576">commited</a> () const</td></tr>
<tr class="memdesc:a87b55e002c7d1b8b2d912c6714a88576"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if the transaction has been commited successfully. Otherwise it returns false.  <a href="#a87b55e002c7d1b8b2d912c6714a88576">More...</a><br /></td></tr>
<tr class="separator:a87b55e002c7d1b8b2d912c6714a88576"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_class_database"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_database')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="class_database.htm">Database</a></td></tr>
<tr class="memitem:a252b2bb8aeb0c0a2509b0eddf0be3c4e inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a252b2bb8aeb0c0a2509b0eddf0be3c4e">Database</a> (const QSqlDatabase &amp;db=QSqlDatabase())</td></tr>
<tr class="separator:a252b2bb8aeb0c0a2509b0eddf0be3c4e inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:afe82d7c8e0e895c0b4f9fa08b4e3eb8e inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#afe82d7c8e0e895c0b4f9fa08b4e3eb8e">Database</a> (<a class="el" href="class_database.htm">Database</a> &amp;&amp;other)</td></tr>
<tr class="separator:afe82d7c8e0e895c0b4f9fa08b4e3eb8e inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2a81e06933bf2ef5be2e59030a7e1e1c inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_database.htm">Database</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a2a81e06933bf2ef5be2e59030a7e1e1c">operator=</a> (<a class="el" href="class_database.htm">Database</a> &amp;&amp;other)</td></tr>
<tr class="separator:a2a81e06933bf2ef5be2e59030a7e1e1c inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7bc0ce48d3711002d4e0490c826f7b5e inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top">QSqlError&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a7bc0ce48d3711002d4e0490c826f7b5e">lastError</a> () const</td></tr>
<tr class="memdesc:a7bc0ce48d3711002d4e0490c826f7b5e inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns information about the last error that occurred on the underlying database.  <a href="class_database.htm#a7bc0ce48d3711002d4e0490c826f7b5e">More...</a><br /></td></tr>
<tr class="separator:a7bc0ce48d3711002d4e0490c826f7b5e inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aae9f7e53275334c91655eeb7a2bde030 inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_non_query_result.htm">NonQueryResult</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#aae9f7e53275334c91655eeb7a2bde030">execNonQuery</a> (const QString &amp;sql) const</td></tr>
<tr class="memdesc:aae9f7e53275334c91655eeb7a2bde030 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes non-query SQL statement (DELETE, INSERT, UPDATE, CREATE, ALTER, etc.)  <a href="class_database.htm#aae9f7e53275334c91655eeb7a2bde030">More...</a><br /></td></tr>
<tr class="separator:aae9f7e53275334c91655eeb7a2bde030 inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a05c1ac255cdba9781f8bf306801bca70 inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_query_result.htm">QueryResult</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a05c1ac255cdba9781f8bf306801bca70">execQuery</a> (const QString &amp;sql) const</td></tr>
<tr class="memdesc:a05c1ac255cdba9781f8bf306801bca70 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes SELECT query.  <a href="class_database.htm#a05c1ac255cdba9781f8bf306801bca70">More...</a><br /></td></tr>
<tr class="separator:a05c1ac255cdba9781f8bf306801bca70 inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8388689590c1f3adeabd2972b221bcb2 inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_insert_query.htm">InsertQuery</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a8388689590c1f3adeabd2972b221bcb2">insertInto</a> (const QString &amp;table) const</td></tr>
<tr class="memdesc:a8388689590c1f3adeabd2972b221bcb2 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates INSERT query wrapper.  <a href="class_database.htm#a8388689590c1f3adeabd2972b221bcb2">More...</a><br /></td></tr>
<tr class="separator:a8388689590c1f3adeabd2972b221bcb2 inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a44fca4a9c9241481a87d59f529e98b9e inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_delete_query.htm">DeleteQuery</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a44fca4a9c9241481a87d59f529e98b9e">deleteFrom</a> (const QString &amp;table) const</td></tr>
<tr class="memdesc:a44fca4a9c9241481a87d59f529e98b9e inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates DELETE query wrapper.  <a href="class_database.htm#a44fca4a9c9241481a87d59f529e98b9e">More...</a><br /></td></tr>
<tr class="separator:a44fca4a9c9241481a87d59f529e98b9e inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2d8dad3df4134306749582216bd437e0 inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_update_query.htm">UpdateQuery</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a2d8dad3df4134306749582216bd437e0">update</a> (const QString &amp;table) const</td></tr>
<tr class="memdesc:a2d8dad3df4134306749582216bd437e0 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates UPDATE query wrapper.  <a href="class_database.htm#a2d8dad3df4134306749582216bd437e0">More...</a><br /></td></tr>
<tr class="separator:a2d8dad3df4134306749582216bd437e0 inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a03e2c9113452bb52bb7018ef2366bce1 inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_prepared_query.htm">PreparedQuery</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a03e2c9113452bb52bb7018ef2366bce1">prepare</a> (const QString &amp;sql, bool forwardOnly=true) const</td></tr>
<tr class="memdesc:a03e2c9113452bb52bb7018ef2366bce1 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Prepares SQL statement.  <a href="class_database.htm#a03e2c9113452bb52bb7018ef2366bce1">More...</a><br /></td></tr>
<tr class="separator:a03e2c9113452bb52bb7018ef2366bce1 inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0076431e130f7815ca7a3ae8ec7284ef inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top">QSqlDatabase &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a0076431e130f7815ca7a3ae8ec7284ef">qSqlDatabase</a> ()</td></tr>
<tr class="memdesc:a0076431e130f7815ca7a3ae8ec7284ef inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns a reference to the wrapped QSqlDatabase object.  <a href="class_database.htm#a0076431e130f7815ca7a3ae8ec7284ef">More...</a><br /></td></tr>
<tr class="separator:a0076431e130f7815ca7a3ae8ec7284ef inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7a13f4fc603fb829f123894d9abd6ea7 inherit pub_methods_class_database"><td class="memTemplParams" colspan="2">template&lt;typename Func &gt; </td></tr>
<tr class="memitem:a7a13f4fc603fb829f123894d9abd6ea7 inherit pub_methods_class_database"><td class="memTemplItemLeft" align="right" valign="top">int&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_database.htm#a7a13f4fc603fb829f123894d9abd6ea7">each</a> (const QString &amp;query, Func &amp;&amp;f) const</td></tr>
<tr class="memdesc:a7a13f4fc603fb829f123894d9abd6ea7 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes <em>query</em> and applies function <em>f</em> to each result row.  <a href="class_database.htm#a7a13f4fc603fb829f123894d9abd6ea7">More...</a><br /></td></tr>
<tr class="separator:a7a13f4fc603fb829f123894d9abd6ea7 inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad2283c7025501aafc33530d19beb02b4 inherit pub_methods_class_database"><td class="memTemplParams" colspan="2">template&lt;typename Func &gt; </td></tr>
<tr class="memitem:ad2283c7025501aafc33530d19beb02b4 inherit pub_methods_class_database"><td class="memTemplItemLeft" align="right" valign="top">int&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_database.htm#ad2283c7025501aafc33530d19beb02b4">first</a> (const QString &amp;query, Func &amp;&amp;f) const</td></tr>
<tr class="memdesc:ad2283c7025501aafc33530d19beb02b4 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes <em>query</em> and applies function <em>f</em> to the first result row.  <a href="class_database.htm#ad2283c7025501aafc33530d19beb02b4">More...</a><br /></td></tr>
<tr class="separator:ad2283c7025501aafc33530d19beb02b4 inherit pub_methods_class_database"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3b1fb50c3263775351fc981fda798207 inherit pub_methods_class_database"><td class="memTemplParams" colspan="2">template&lt;typename Func &gt; </td></tr>
<tr class="memitem:a3b1fb50c3263775351fc981fda798207 inherit pub_methods_class_database"><td class="memTemplItemLeft" align="right" valign="top">int&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_database.htm#a3b1fb50c3263775351fc981fda798207">range</a> (const QString &amp;query, int start, int count, Func &amp;&amp;f) const</td></tr>
<tr class="memdesc:a3b1fb50c3263775351fc981fda798207 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes <em>query</em> and applies function <em>f</em> to <em>count</em> result rows starting from index <em>start</em>.  <a href="class_database.htm#a3b1fb50c3263775351fc981fda798207">More...</a><br /></td></tr>
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<tr class="memitem:a91583d42e701fb399563facc3c3c58c0 inherit pub_methods_class_database"><td class="memTemplParams" colspan="2">template&lt;typename Func &gt; </td></tr>
<tr class="memitem:a91583d42e701fb399563facc3c3c58c0 inherit pub_methods_class_database"><td class="memTemplItemLeft" align="right" valign="top">int&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_database.htm#a91583d42e701fb399563facc3c3c58c0">top</a> (const QString &amp;query, int topCount, Func &amp;&amp;f) const</td></tr>
<tr class="memdesc:a91583d42e701fb399563facc3c3c58c0 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes <em>query</em> and applies function <em>f</em> to <em>topCount</em> result rows.  <a href="class_database.htm#a91583d42e701fb399563facc3c3c58c0">More...</a><br /></td></tr>
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<tr class="memitem:a909783661db7d15e0b0adca5a96db4de inherit pub_methods_class_database"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
<tr class="memitem:a909783661db7d15e0b0adca5a96db4de inherit pub_methods_class_database"><td class="memTemplItemLeft" align="right" valign="top">T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_database.htm#a909783661db7d15e0b0adca5a96db4de">scalar</a> (const QString &amp;query) const</td></tr>
<tr class="memdesc:a909783661db7d15e0b0adca5a96db4de inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes <em>query</em> and returns scalar value converted to T.  <a href="class_database.htm#a909783661db7d15e0b0adca5a96db4de">More...</a><br /></td></tr>
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<tr class="memitem:a39dbcd9a97f4e3c38c8c5ba48e445216 inherit pub_methods_class_database"><td class="memItemLeft" align="right" valign="top">QVariant&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a39dbcd9a97f4e3c38c8c5ba48e445216">scalar</a> (const QString &amp;query) const</td></tr>
<tr class="memdesc:a39dbcd9a97f4e3c38c8c5ba48e445216 inherit pub_methods_class_database"><td class="mdescLeft">&#160;</td><td class="mdescRight">Executes <em>query</em> and returns scalar value.  <a href="class_database.htm#a39dbcd9a97f4e3c38c8c5ba48e445216">More...</a><br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pro_attribs_class_database"><td colspan="2" onclick="javascript:toggleInherit('pro_attribs_class_database')"><img src="closed.png" alt="-"/>&#160;Protected Attributes inherited from <a class="el" href="class_database.htm">Database</a></td></tr>
<tr class="memitem:a7357cbeca05937556f66e2fe2288bdb5 inherit pro_attribs_class_database"><td class="memItemLeft" align="right" valign="top">QSqlDatabase&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_database.htm#a7357cbeca05937556f66e2fe2288bdb5">m_db</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>QSqlDatabase transaction wrapper. </p>
<p>Features:</p><ul>
<li>Automatic rollback of non-expclicitely commited transactions</li>
<li>Helper methods: <a class="el" href="class_database.htm#aae9f7e53275334c91655eeb7a2bde030" title="Executes non-query SQL statement (DELETE, INSERT, UPDATE, CREATE, ALTER, etc.) ">Transaction::execNonQuery</a>, <a class="el" href="class_database.htm#a05c1ac255cdba9781f8bf306801bca70" title="Executes SELECT query. ">Transaction::execQuery</a>, <a class="el" href="class_database.htm#a8388689590c1f3adeabd2972b221bcb2" title="Creates INSERT query wrapper. ">Transaction::insertInto</a>, <a class="el" href="class_database.htm#a44fca4a9c9241481a87d59f529e98b9e" title="Creates DELETE query wrapper. ">Transaction::deleteFrom</a>, <a class="el" href="class_database.htm#a2d8dad3df4134306749582216bd437e0" title="Creates UPDATE query wrapper. ">Transaction::update</a>, <a class="el" href="class_database.htm#a03e2c9113452bb52bb7018ef2366bce1" title="Prepares SQL statement. ">Transaction::prepare</a>.</li>
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<div class="fragment"><div class="line"><span class="keywordtype">void</span> test()</div><div class="line">{</div><div class="line">   QSqlDatabase db = QSqlDatabase::addDatabase(<span class="stringliteral">&quot;QSQLITE&quot;</span>);</div><div class="line">   db.setDatabaseName(<span class="stringliteral">&quot;:memory:&quot;</span>);</div><div class="line">   db.open();</div><div class="line"></div><div class="line">   <span class="keywordflow">try</span></div><div class="line">   {</div><div class="line">      <a class="code" href="class_transaction.htm">Transaction</a> t(db);</div><div class="line"></div><div class="line">      t.<a class="code" href="class_database.htm#aae9f7e53275334c91655eeb7a2bde030">execNonQuery</a>(<span class="stringliteral">&quot;CREATE TABLE table (a int, b int, c int, d text)&quot;</span>);</div><div class="line"></div><div class="line">      t.<a class="code" href="class_database.htm#a8388689590c1f3adeabd2972b221bcb2">insertInto</a>(<span class="stringliteral">&quot;table (a, b, c, d)&quot;</span>)</div><div class="line">         .<a class="code" href="class_insert_query.htm#ae207fa97fdf9571fbcded31bbad9b9ed">values</a>(1, 2, 3, <span class="stringliteral">&quot;row1&quot;</span>)</div><div class="line">         .<a class="code" href="class_insert_query.htm#ae207fa97fdf9571fbcded31bbad9b9ed">values</a>(4, 5, 6, <span class="stringliteral">&quot;row2&quot;</span>)</div><div class="line">         .<a class="code" href="class_insert_query.htm#ae207fa97fdf9571fbcded31bbad9b9ed">values</a>(7, 8, 9, <span class="stringliteral">&quot;row3&quot;</span>)</div><div class="line">         .<a class="code" href="class_insert_query.htm#a385c674dfad02ee62cfc0d3e124cd33b">exec</a>();</div><div class="line"></div><div class="line">      <a class="code" href="class_prepared_query.htm">PreparedQuery</a> query = t.<a class="code" href="class_database.htm#a03e2c9113452bb52bb7018ef2366bce1">prepare</a>(<span class="stringliteral">&quot;SELECT a, b, c, d FROM table&quot;</span>);</div><div class="line"></div><div class="line">      <a class="code" href="class_query_result.htm">QueryResult</a> res = query.<a class="code" href="class_prepared_query.htm#a1013aea1638d6d04868ce39130bc1b67">exec</a>();</div><div class="line">      <span class="keywordflow">while</span> (res.<a class="code" href="class_query_result.htm#a1c756382c20c126979b28715d529c054">next</a>())</div><div class="line">      {</div><div class="line">         QVariantMap map = res.<a class="code" href="class_query_result.htm#a023bd84f7010368d616d7dbb1b399a06">toMap</a>();</div><div class="line">         qDebug() &lt;&lt; map;</div><div class="line">      }</div><div class="line"></div><div class="line">      t.<a class="code" href="class_database.htm#a2d8dad3df4134306749582216bd437e0">update</a>(<span class="stringliteral">&quot;table&quot;</span>)</div><div class="line">         .<a class="code" href="class_update_query.htm#a7c1b4eaa45048ec8a3f6f7d4223f5ace">set</a>(<span class="stringliteral">&quot;a&quot;</span>, 111)</div><div class="line">         .<a class="code" href="class_update_query.htm#a7c1b4eaa45048ec8a3f6f7d4223f5ace">set</a>(<span class="stringliteral">&quot;b&quot;</span>, 222)</div><div class="line">         .<a class="code" href="class_update_query.htm#abb4c7b7502599a78699e3a1f4cb4cbda">where</a>(<span class="stringliteral">&quot;c = ? OR c = ?&quot;</span>, 3, 6);</div><div class="line"></div><div class="line">      res = query.<a class="code" href="class_prepared_query.htm#a1013aea1638d6d04868ce39130bc1b67">exec</a>();</div><div class="line">      <span class="keywordflow">while</span> (res.<a class="code" href="class_query_result.htm#a1c756382c20c126979b28715d529c054">next</a>())</div><div class="line">      {</div><div class="line">         QVariantMap map = res.<a class="code" href="class_query_result.htm#a023bd84f7010368d616d7dbb1b399a06">toMap</a>();</div><div class="line">         qDebug() &lt;&lt; map;</div><div class="line">      }</div><div class="line"></div><div class="line">      t.<a class="code" href="class_transaction.htm#a7388031cba0416d48e03e3f7acd5ca6a">commit</a>(); <span class="comment">//the transaction will be rolled back on exit from the scope (when calling the destructor) if you do not explicitly commit</span></div><div class="line"></div><div class="line">   <span class="keywordflow">catch</span> (<span class="keyword">const</span> <a class="code" href="class_d_b_exception.htm">DBException</a> &amp;e)</div><div class="line">   {</div><div class="line">      <span class="comment">//you can handle all the errors at one point</span></div><div class="line">      <span class="comment">//the transaction will be automatically rolled back on exception</span></div><div class="line"></div><div class="line">      qDebug() &lt;&lt; e.<a class="code" href="class_d_b_exception.htm#adf142ded3fb236826a5a6ba4a606e584">lastError</a> &lt;&lt; e.<a class="code" href="class_d_b_exception.htm#a3ec8b4b593abee155554472ae0b58f12">lastQuery</a>;</div><div class="line">   }</div><div class="line">}</div></div><!-- fragment --> </div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a9fed08d5643b66471a6e9fc75f351117">&#9670;&nbsp;</a></span>Transaction() <span class="overload">[1/2]</span></h2>

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<h2 class="memtitle"><span class="permalink"><a href="#a362b0d2524d0c799165190517192dca9">&#9670;&nbsp;</a></span>~Transaction()</h2>

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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a7388031cba0416d48e03e3f7acd5ca6a">&#9670;&nbsp;</a></span>commit()</h2>

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<p>Commits transaction. </p>
<p>The transaction will be rolled back on calling the destructor if not explicitly commited</p>
<dl class="exception"><dt>Exceptions</dt><dd>
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<h2 class="memtitle"><span class="permalink"><a href="#a87b55e002c7d1b8b2d912c6714a88576">&#9670;&nbsp;</a></span>commited()</h2>

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<p>Returns true if the transaction has been commited successfully. Otherwise it returns false. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a384204be2d6c76f7f6d20d612f487e71">&#9670;&nbsp;</a></span>operator=()</h2>

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          <td>(</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a01e20e050a9ee2ba3eecf1b5ed57e2eb">&#9670;&nbsp;</a></span>rollback()</h2>

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<p>Rolls back transaction. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a53d4633727d54be34b7af5d68e7ef0ac">&#9670;&nbsp;</a></span>started()</h2>

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<p>Returns true if the transaction has been started successfully. Otherwise it returns false. </p>

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<hr/>The documentation for this class was generated from the following file:<ul>
<li>EasyQtSql/<a class="el" href="_easy_qt_sql___transaction_8h_source.htm">EasyQtSql_Transaction.h</a></li>
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