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diff --git a/user_guide/database/transactions.html b/user_guide/database/transactions.html deleted file mode 100644 index cf370541a..000000000 --- a/user_guide/database/transactions.html +++ /dev/null @@ -1,616 +0,0 @@ - - -<!DOCTYPE html> -<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> -<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> -<head> - <meta charset="utf-8"> - <meta name="viewport" content="width=device-width, initial-scale=1.0"> - - <title>Transactions — CodeIgniter 3.1.5 documentation</title> - - - - - <link rel="shortcut icon" href="../_static/ci-icon.ico"/> - - - - <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'> - - - - - - - - - - <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> - - - - <link rel="top" title="CodeIgniter 3.1.5 documentation" href="../index.html"/> - <link 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class="wy-breadcrumbs-aside"> - - </li> - <div style="float:right;margin-left:5px;" id="closeMe"> - <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> - </div> - </ul> - <hr/> -</div> - <div role="main" class="document"> - - <div class="section" id="transactions"> -<h1>Transactions<a class="headerlink" href="#transactions" title="Permalink to this headline">¶</a></h1> -<p>CodeIgniter’s database abstraction allows you to use transactions with -databases that support transaction-safe table types. In MySQL, you’ll -need to be running InnoDB or BDB table types rather than the more common -MyISAM. Most other database platforms support transactions natively.</p> -<p>If you are not familiar with transactions we recommend you find a good -online resource to learn about them for your particular database. The -information below assumes you have a basic understanding of -transactions.</p> -<div class="section" id="codeigniter-s-approach-to-transactions"> -<h2>CodeIgniter’s Approach to Transactions<a class="headerlink" href="#codeigniter-s-approach-to-transactions" title="Permalink to this headline">¶</a></h2> -<p>CodeIgniter utilizes an approach to transactions that is very similar to -the process used by the popular database class ADODB. We’ve chosen that -approach because it greatly simplifies the process of running -transactions. In most cases all that is required are two lines of code.</p> -<p>Traditionally, transactions have required a fair amount of work to -implement since they demand that you keep track of your queries and -determine whether to commit or rollback based on the success or failure -of your queries. This is particularly cumbersome with nested queries. In -contrast, we’ve implemented a smart transaction system that does all -this for you automatically (you can also manage your transactions -manually if you choose to, but there’s really no benefit).</p> -</div> -<div class="section" id="running-transactions"> -<h2>Running Transactions<a class="headerlink" href="#running-transactions" title="Permalink to this headline">¶</a></h2> -<p>To run your queries using transactions you will use the -$this->db->trans_start() and $this->db->trans_complete() functions as -follows:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">();</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'ANOTHER QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AND YET ANOTHER QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span> -</pre></div> -</div> -<p>You can run as many queries as you want between the start/complete -functions and they will all be committed or rolled back based on success -or failure of any given query.</p> -</div> -<div class="section" id="strict-mode"> -<h2>Strict Mode<a class="headerlink" href="#strict-mode" title="Permalink to this headline">¶</a></h2> -<p>By default CodeIgniter runs all transactions in Strict Mode. When strict -mode is enabled, if you are running multiple groups of transactions, if -one group fails all groups will be rolled back. If strict mode is -disabled, each group is treated independently, meaning a failure of one -group will not affect any others.</p> -<p>Strict Mode can be disabled as follows:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_strict</span><span class="p">(</span><span class="k">FALSE</span><span class="p">);</span> -</pre></div> -</div> -</div> -<div class="section" id="managing-errors"> -<h2>Managing Errors<a class="headerlink" href="#managing-errors" title="Permalink to this headline">¶</a></h2> -<p>If you have error reporting enabled in your config/database.php file -you’ll see a standard error message if the commit was unsuccessful. If -debugging is turned off, you can manage your own errors like this:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">();</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'ANOTHER QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span> - -<span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_status</span><span class="p">()</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span> -<span class="p">{</span> - <span class="c1">// generate an error... or use the log_message() function to log your error</span> -<span class="p">}</span> -</pre></div> -</div> -</div> -<div class="section" id="disabling-transactions"> -<h2>Disabling Transactions<a class="headerlink" href="#disabling-transactions" title="Permalink to this headline">¶</a></h2> -<p>If you would like to disable transactions you can do so using -<tt class="docutils literal"><span class="pre">$this->db->trans_off()</span></tt>:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_off</span><span class="p">();</span> - -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">();</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span> -</pre></div> -</div> -<p>When transactions are disabled, your queries will be auto-committed, just as -they are when running queries without transactions, practically ignoring -any calls to <tt class="docutils literal"><span class="pre">trans_start()</span></tt>, <tt class="docutils literal"><span class="pre">trans_complete()</span></tt>, etc.</p> -</div> -<div class="section" id="test-mode"> -<h2>Test Mode<a class="headerlink" href="#test-mode" title="Permalink to this headline">¶</a></h2> -<p>You can optionally put the transaction system into “test mode”, which -will cause your queries to be rolled back – even if the queries produce -a valid result. To use test mode simply set the first parameter in the -$this->db->trans_start() function to TRUE:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">(</span><span class="k">TRUE</span><span class="p">);</span> <span class="c1">// Query will be rolled back</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span> -</pre></div> -</div> -</div> -<div class="section" id="running-transactions-manually"> -<h2>Running Transactions Manually<a class="headerlink" href="#running-transactions-manually" title="Permalink to this headline">¶</a></h2> -<p>If you would like to run transactions manually you can do so as follows:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_begin</span><span class="p">();</span> - -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'ANOTHER QUERY...'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AND YET ANOTHER QUERY...'</span><span class="p">);</span> - -<span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_status</span><span class="p">()</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span> -<span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_rollback</span><span class="p">();</span> -<span class="p">}</span> -<span class="k">else</span> -<span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_commit</span><span class="p">();</span> -<span class="p">}</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">Make sure to use $this->db->trans_begin() when running manual -transactions, <strong>NOT</strong> $this->db->trans_start().</p> -</div> -</div> -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="metadata.html" class="btn btn-neutral float-right" title="Database Metadata">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="query_builder.html" class="btn btn-neutral" title="Query Builder Class"><span class="fa fa-arrow-circle-left"></span> Previous</a> - - </div> - - - <hr/> - - <div role="contentinfo"> - <p> - © Copyright 2014 - 2017, British Columbia Institute of Technology. - Last updated on Jun 19, 2017. - </p> - </div> - - Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. - -</footer> - </div> - </div> - - </section> - - </div> - - - - - - <script type="text/javascript"> - var DOCUMENTATION_OPTIONS = { - URL_ROOT:'../', - VERSION:'3.1.5', - COLLAPSE_INDEX:false, - FILE_SUFFIX:'.html', - HAS_SOURCE: false - }; - </script> - <script type="text/javascript" src="../_static/jquery.js"></script> - <script type="text/javascript" src="../_static/underscore.js"></script> - <script type="text/javascript" src="../_static/doctools.js"></script> - - - - - - <script type="text/javascript" src="../_static/js/theme.js"></script> - - - - - <script type="text/javascript"> - jQuery(function () { - SphinxRtdTheme.StickyNav.enable(); - }); - </script> - - -</body> -</html>
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