<?xml version="1.0" encoding="iso-8859-1"?> <!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> <title>Module: ActiveRecord::ConnectionAdapters::QueryCache</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <link rel="stylesheet" href="../../.././rdoc-style.css" type="text/css" media="screen" /> <script type="text/javascript"> // <![CDATA[ function popupCode( url ) { window.open(url, "Code", "resizable=yes,scrollbars=yes,toolbar=no,status=no,height=150,width=400") } function toggleCode( id ) { if ( document.getElementById ) elem = document.getElementById( id ); else if ( document.all ) elem = eval( "document.all." + id ); else return false; elemStyle = elem.style; if ( elemStyle.display != "block" ) { elemStyle.display = "block" } else { elemStyle.display = "none" } return true; } // Make codeblocks hidden by default document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }</style>" ) // ]]> </script> </head> <body> <div id="classHeader"> <table class="header-table"> <tr class="top-aligned-row"> <td><strong>Module</strong></td> <td class="class-name-in-header">ActiveRecord::ConnectionAdapters::QueryCache</td> </tr> <tr class="top-aligned-row"> <td><strong>In:</strong></td> <td> <a href="../../../files/lib/active_record/connection_adapters/abstract/query_cache_rb.html"> lib/active_record/connection_adapters/abstract/query_cache.rb </a> <br /> </td> </tr> </table> </div> <!-- banner header --> <div id="bodyContent"> <div id="contextContent"> </div> <div id="method-list"> <h3 class="section-bar">Methods</h3> <div class="name-list"> <a href="#M000177">cache</a> <a href="#M000179">clear_query_cache</a> <a href="#M000181">columns_with_query_cache</a> <a href="#M000176">dirties_query_cache</a> <a href="#M000175">included</a> <a href="#M000180">select_all_with_query_cache</a> <a href="#M000178">uncached</a> </div> </div> </div> <!-- if includes --> <div id="section"> <div id="attribute-list"> <h3 class="section-bar">Attributes</h3> <div class="name-list"> <table> <tr class="top-aligned-row context-row"> <td class="context-item-name">query_cache</td> <td class="context-item-value"> [R] </td> <td class="context-item-desc"></td> </tr> <tr class="top-aligned-row context-row"> <td class="context-item-name">query_cache_enabled</td> <td class="context-item-value"> [R] </td> <td class="context-item-desc"></td> </tr> </table> </div> </div> <!-- if method_list --> <div id="methods"> <h3 class="section-bar">Public Class methods</h3> <div id="method-M000176" class="method-detail"> <a name="M000176"></a> <div class="method-heading"> <a href="QueryCache.src/M000176.html" target="Code" class="method-signature" onclick="popupCode('QueryCache.src/M000176.html');return false;"> <span class="method-name">dirties_query_cache</span><span class="method-args">(base, *method_names)</span> </a> </div> <div class="method-description"> </div> </div> <div id="method-M000175" class="method-detail"> <a name="M000175"></a> <div class="method-heading"> <a href="QueryCache.src/M000175.html" target="Code" class="method-signature" onclick="popupCode('QueryCache.src/M000175.html');return false;"> <span class="method-name">included</span><span class="method-args">(base)</span> </a> </div> <div class="method-description"> </div> </div> <h3 class="section-bar">Public Instance methods</h3> <div id="method-M000177" class="method-detail"> <a name="M000177"></a> <div class="method-heading"> <a href="QueryCache.src/M000177.html" target="Code" class="method-signature" onclick="popupCode('QueryCache.src/M000177.html');return false;"> <span class="method-name">cache</span><span class="method-args">() {|| ...}</span> </a> </div> <div class="method-description"> <p> Enable the query <a href="QueryCache.html#M000177">cache</a> within the block. </p> </div> </div> <div id="method-M000179" class="method-detail"> <a name="M000179"></a> <div class="method-heading"> <a href="QueryCache.src/M000179.html" target="Code" class="method-signature" onclick="popupCode('QueryCache.src/M000179.html');return false;"> <span class="method-name">clear_query_cache</span><span class="method-args">()</span> </a> </div> <div class="method-description"> <p> Clears the query <a href="QueryCache.html#M000177">cache</a>. </p> <p> One reason you may wish to call this method explicitly is between queries that ask the database to randomize results. Otherwise the <a href="QueryCache.html#M000177">cache</a> would see the same SQL query and repeatedly return the same result each time, silently undermining the randomness you were expecting. </p> </div> </div> <div id="method-M000181" class="method-detail"> <a name="M000181"></a> <div class="method-heading"> <a href="QueryCache.src/M000181.html" target="Code" class="method-signature" onclick="popupCode('QueryCache.src/M000181.html');return false;"> <span class="method-name">columns_with_query_cache</span><span class="method-args">(*args)</span> </a> </div> <div class="method-description"> </div> </div> <div id="method-M000180" class="method-detail"> <a name="M000180"></a> <div class="method-heading"> <a href="QueryCache.src/M000180.html" target="Code" class="method-signature" onclick="popupCode('QueryCache.src/M000180.html');return false;"> <span class="method-name">select_all_with_query_cache</span><span class="method-args">(*args)</span> </a> </div> <div class="method-description"> </div> </div> <div id="method-M000178" class="method-detail"> <a name="M000178"></a> <div class="method-heading"> <a href="QueryCache.src/M000178.html" target="Code" class="method-signature" onclick="popupCode('QueryCache.src/M000178.html');return false;"> <span class="method-name">uncached</span><span class="method-args">() {|| ...}</span> </a> </div> <div class="method-description"> <p> Disable the query <a href="QueryCache.html#M000177">cache</a> within the block. </p> </div> </div> </div> </div> <div id="validator-badges"> <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p> </div> </body> </html>