<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Sets whether this query can be done on a secondary [deprecated]</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="mongocursor.skip.html">MongoCursor::skip</a></div>
<div class="next" style="text-align: right; float: right;"><a href="mongocursor.snapshot.html">MongoCursor::snapshot</a></div>
<div class="up"><a href="class.mongocursor.html">MongoCursor</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="mongocursor.slaveokay" class="refentry">
<div class="refnamediv">
<h1 class="refname">MongoCursor::slaveOkay</h1>
<p class="verinfo">(PECL mongo >=0.9.4)</p><p class="refpurpose"><span class="refname">MongoCursor::slaveOkay</span> — <span class="dc-title">Sets whether this query can be done on a secondary [deprecated]</span></p>
</div>
<div class="refsect1 description" id="refsect1-mongocursor.slaveokay-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type"><a href="class.mongocursor.html" class="type MongoCursor">MongoCursor</a></span> <span class="methodname"><strong>MongoCursor::slaveOkay</strong></span>
([ <span class="methodparam"><span class="type">bool</span> <code class="parameter">$okay</code><span class="initializer"> = <strong><code>TRUE</code></strong></span></span>
] )</div>
<div class="warning"><strong class="warning">Warning</strong>
<p class="para">
This method is deprecated since version 1.5.0. Instead, please use
<span class="methodname"><a href="mongocursor.setreadpreference.html" class="methodname">MongoCursor::setReadPreference()</a></span> and <a href="mongo.readpreferences.html" class="xref">Read Preferences</a>.
</p>
</div>
<p class="para">
Calling this will make the driver route reads to secondaries if:
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
You are using a replica set, and
</span>
</li>
<li class="listitem">
<span class="simpara">
You created a <a href="class.mongoclient.html" class="classname">MongoClient</a> instance using the option
<em>"replicaSet" => "setName"</em>, and
</span>
</li>
<li class="listitem">
<span class="simpara">
There is a healthy secondary that can be reached by the driver.
</span>
</li>
</ul>
You can check which server was used for this query by calling
<span class="function"><a href="mongocursor.info.html" class="function">MongoCursor::info()</a></span> after running the query. It's
<em>server</em> field will show which server the query was sent to.
</p>
<p class="para">
Note that you should use this function even if you do not use the automatic
routing to secondaries. If you connect directly to a secondary in a replica
set, you still need to call this function, which basically tells the database
that you are aware that you might be getting older data and you're okay with
that. If you do not call this, you'll get "not master" errors when you try to
query.
</p>
<p class="para">
This method will override the static class variable
<var class="varname"><var class="varname">MongoCursor::$slaveOkay</var></var>. It will also override
<span class="function"><a href="mongo.setslaveokay.html" class="function">Mongo::setSlaveOkay()</a></span>,
<span class="function"><a href="mongodb.setslaveokay.html" class="function">MongoDB::setSlaveOkay()</a></span> and
<span class="function"><a href="mongocollection.setslaveokay.html" class="function">MongoCollection::setSlaveOkay()</a></span>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-mongocursor.slaveokay-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">okay</code>
</dt>
<dd>
<p class="para">
If it is okay to query the secondary.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-mongocursor.slaveokay-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns this cursor.
</p>
</div>
<div class="refsect1 errors" id="refsect1-mongocursor.slaveokay-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
Throws <a href="class.mongocursorexception.html" class="classname">MongoCursorException</a> if this cursor has started iterating.
</p>
</div>
<div class="refsect1 examples" id="refsect1-mongocursor.slaveokay-examples">
<h3 class="title">Examples</h3>
<div class="example" id="mongocursor.intro-example">
<p><strong>Example #1 <span class="function"><strong>MongoCursor::slaveOkay()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />MongoCursor</span><span style="color: #007700">::</span><span style="color: #0000BB">$slaveOkay </span><span style="color: #007700">= </span><span style="color: #0000BB">false</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// cannot query secondary<br /></span><span style="color: #0000BB">$cursor </span><span style="color: #007700">= </span><span style="color: #0000BB">$collection</span><span style="color: #007700">-></span><span style="color: #0000BB">find</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">// can query secondary<br /></span><span style="color: #0000BB">$cursor </span><span style="color: #007700">= </span><span style="color: #0000BB">$collection</span><span style="color: #007700">-></span><span style="color: #0000BB">find</span><span style="color: #007700">()-></span><span style="color: #0000BB">slaveOkay</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">MongoCursor</span><span style="color: #007700">::</span><span style="color: #0000BB">$slaveOkay </span><span style="color: #007700">= </span><span style="color: #0000BB">true</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// can query secondary<br /></span><span style="color: #0000BB">$cursor </span><span style="color: #007700">= </span><span style="color: #0000BB">$collection</span><span style="color: #007700">-></span><span style="color: #0000BB">find</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">// cannot query secondary<br /></span><span style="color: #0000BB">$cursor </span><span style="color: #007700">= </span><span style="color: #0000BB">$collection</span><span style="color: #007700">-></span><span style="color: #0000BB">find</span><span style="color: #007700">()-></span><span style="color: #0000BB">slaveOkay</span><span style="color: #007700">(</span><span style="color: #0000BB">false</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-mongocursor.slaveokay-seealso">
<h3 class="title">See Also</h3>
<ul class="simplelist">
<li class="member"><a href="mongo.readpreferences.html" class="xref">Read Preferences</a></li>
<li class="member"><span class="methodname"><a href="mongocursor.setreadpreference.html" class="methodname" rel="rdfs-seeAlso">MongoCursor::setReadPreference()</a> - Set the read preference for this query</span></li>
<li class="member"><span class="methodname"><a href="mongocursor.getreadpreference.html" class="methodname" rel="rdfs-seeAlso">MongoCursor::getReadPreference()</a> - Get the read preference for this query</span></li>
</ul>
</div>
<div class="refsect1 changelog" id="refsect1-mongocursor.slaveokay-changelog">
<h3 class="title">Changelog</h3>
<p class="para">
<table class="doctable informaltable">
<thead>
<tr>
<th>Version</th>
<th>Description</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>1.5.0</td>
<td>
This method has been deprecated in favour of
<span class="methodname"><a href="mongocursor.setreadpreference.html" class="methodname">MongoCursor::setReadPreference()</a></span> and <a href="mongo.readpreferences.html" class="xref">Read Preferences</a>.
</td>
</tr>
</tbody>
</table>
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="mongocursor.skip.html">MongoCursor::skip</a></div>
<div class="next" style="text-align: right; float: right;"><a href="mongocursor.snapshot.html">MongoCursor::snapshot</a></div>
<div class="up"><a href="class.mongocursor.html">MongoCursor</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
