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diff --git a/user_guide/libraries/migration.html b/user_guide/libraries/migration.html deleted file mode 100644 index fb0afe7fe..000000000 --- a/user_guide/libraries/migration.html +++ /dev/null @@ -1,758 +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>Migrations Class — CodeIgniter 3.1.7 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="index" title="Index" - href="../genindex.html"/> - <link rel="search" 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<div role="main" class="document"> - - <div class="section" id="migrations-class"> -<h1>Migrations Class<a class="headerlink" href="#migrations-class" title="Permalink to this headline">¶</a></h1> -<p>Migrations are a convenient way for you to alter your database in a -structured and organized manner. You could edit fragments of SQL by hand -but you would then be responsible for telling other developers that they -need to go and run them. You would also have to keep track of which changes -need to be run against the production machines next time you deploy.</p> -<p>The database table <strong>migration</strong> tracks which migrations have already been -run so all you have to do is update your application files and -call <code class="docutils literal"><span class="pre">$this->migration->current()</span></code> to work out which migrations should be run. -The current version is found in <strong>application/config/migration.php</strong>.</p> -<div class="contents local topic" id="contents"> -<ul class="simple"> -<li><a class="reference internal" href="#migration-file-names" id="id1">Migration file names</a></li> -<li><a class="reference internal" href="#create-a-migration" id="id2">Create a Migration</a></li> -<li><a class="reference internal" href="#usage-example" id="id3">Usage Example</a></li> -<li><a class="reference internal" href="#migration-preferences" id="id4">Migration Preferences</a></li> -<li><a class="reference internal" href="#class-reference" id="id5">Class Reference</a></li> -</ul> -</div> -<div class="custom-index container"></div><div class="section" id="migration-file-names"> -<h2><a class="toc-backref" href="#id1">Migration file names</a><a class="headerlink" href="#migration-file-names" title="Permalink to this headline">¶</a></h2> -<p>Each Migration is run in numeric order forward or backwards depending on the -method taken. Two numbering styles are available:</p> -<ul class="simple"> -<li><strong>Sequential:</strong> each migration is numbered in sequence, starting with <strong>001</strong>. -Each number must be three digits, and there must not be any gaps in the -sequence. (This was the numbering scheme prior to CodeIgniter 3.0.)</li> -<li><strong>Timestamp:</strong> each migration is numbered using the timestamp when the migration -was created, in <strong>YYYYMMDDHHIISS</strong> format (e.g. <strong>20121031100537</strong>). This -helps prevent numbering conflicts when working in a team environment, and is -the preferred scheme in CodeIgniter 3.0 and later.</li> -</ul> -<p>The desired style may be selected using the <code class="docutils literal"><span class="pre">$config['migration_type']</span></code> -setting in your <em>application/config/migration.php</em> file.</p> -<p>Regardless of which numbering style you choose to use, prefix your migration -files with the migration number followed by an underscore and a descriptive -name for the migration. For example:</p> -<ul class="simple"> -<li>001_add_blog.php (sequential numbering)</li> -<li>20121031100537_add_blog.php (timestamp numbering)</li> -</ul> -</div> -<div class="section" id="create-a-migration"> -<h2><a class="toc-backref" href="#id2">Create a Migration</a><a class="headerlink" href="#create-a-migration" title="Permalink to this headline">¶</a></h2> -<p>This will be the first migration for a new site which has a blog. All -migrations go in the <strong>application/migrations/</strong> directory and have names such -as <em>20121031100537_add_blog.php</em>.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> - -<span class="nb">defined</span><span class="p">(</span><span class="s1">'BASEPATH'</span><span class="p">)</span> <span class="k">OR</span> <span class="k">exit</span><span class="p">(</span><span class="s1">'No direct script access allowed'</span><span class="p">);</span> - -<span class="k">class</span> <span class="nc">Migration_Add_blog</span> <span class="k">extends</span> <span class="nx">CI_Migration</span> <span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">up</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">dbforge</span><span class="o">-></span><span class="na">add_field</span><span class="p">(</span><span class="k">array</span><span class="p">(</span> - <span class="s1">'blog_id'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span> - <span class="s1">'type'</span> <span class="o">=></span> <span class="s1">'INT'</span><span class="p">,</span> - <span class="s1">'constraint'</span> <span class="o">=></span> <span class="mi">5</span><span class="p">,</span> - <span class="s1">'unsigned'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span> - <span class="s1">'auto_increment'</span> <span class="o">=></span> <span class="k">TRUE</span> - <span class="p">),</span> - <span class="s1">'blog_title'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span> - <span class="s1">'type'</span> <span class="o">=></span> <span class="s1">'VARCHAR'</span><span class="p">,</span> - <span class="s1">'constraint'</span> <span class="o">=></span> <span class="s1">'100'</span><span class="p">,</span> - <span class="p">),</span> - <span class="s1">'blog_description'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span> - <span class="s1">'type'</span> <span class="o">=></span> <span class="s1">'TEXT'</span><span class="p">,</span> - <span class="s1">'null'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span> - <span class="p">),</span> - <span class="p">));</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">dbforge</span><span class="o">-></span><span class="na">add_key</span><span class="p">(</span><span class="s1">'blog_id'</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">dbforge</span><span class="o">-></span><span class="na">create_table</span><span class="p">(</span><span class="s1">'blog'</span><span class="p">);</span> - <span class="p">}</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">down</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">dbforge</span><span class="o">-></span><span class="na">drop_table</span><span class="p">(</span><span class="s1">'blog'</span><span class="p">);</span> - <span class="p">}</span> -<span class="p">}</span> -</pre></div> -</div> -<p>Then in <strong>application/config/migration.php</strong> set <code class="docutils literal"><span class="pre">$config['migration_version']</span> <span class="pre">=</span> <span class="pre">20121031100537;</span></code>.</p> -</div> -<div class="section" id="usage-example"> -<h2><a class="toc-backref" href="#id3">Usage Example</a><a class="headerlink" href="#usage-example" title="Permalink to this headline">¶</a></h2> -<p>In this example some simple code is placed in <strong>application/controllers/Migrate.php</strong> -to update the schema.:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> - -<span class="k">class</span> <span class="nc">Migrate</span> <span class="k">extends</span> <span class="nx">CI_Controller</span> -<span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">index</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'migration'</span><span class="p">);</span> - - <span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">migration</span><span class="o">-></span><span class="na">current</span><span class="p">()</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span> - <span class="p">{</span> - <span class="nx">show_error</span><span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">migration</span><span class="o">-></span><span class="na">error_string</span><span class="p">());</span> - <span class="p">}</span> - <span class="p">}</span> - -<span class="p">}</span> -</pre></div> -</div> -</div> -<div class="section" id="migration-preferences"> -<h2><a class="toc-backref" href="#id4">Migration Preferences</a><a class="headerlink" href="#migration-preferences" title="Permalink to this headline">¶</a></h2> -<p>The following is a table of all the config options for migrations.</p> -<table border="1" class="docutils"> -<colgroup> -<col width="22%" /> -<col width="18%" /> -<col width="22%" /> -<col width="38%" /> -</colgroup> -<thead valign="bottom"> -<tr class="row-odd"><th class="head">Preference</th> -<th class="head">Default</th> -<th class="head">Options</th> -<th class="head">Description</th> -</tr> -</thead> -<tbody valign="top"> -<tr class="row-even"><td><strong>migration_enabled</strong></td> -<td>FALSE</td> -<td>TRUE / FALSE</td> -<td>Enable or disable migrations.</td> -</tr> -<tr class="row-odd"><td><strong>migration_path</strong></td> -<td>APPPATH.’migrations/’</td> -<td>None</td> -<td>The path to your migrations folder.</td> -</tr> -<tr class="row-even"><td><strong>migration_version</strong></td> -<td>0</td> -<td>None</td> -<td>The current version your database should use.</td> -</tr> -<tr class="row-odd"><td><strong>migration_table</strong></td> -<td>migrations</td> -<td>None</td> -<td>The table name for storing the schema -version number.</td> -</tr> -<tr class="row-even"><td><strong>migration_auto_latest</strong></td> -<td>FALSE</td> -<td>TRUE / FALSE</td> -<td>Enable or disable automatically -running migrations.</td> -</tr> -<tr class="row-odd"><td><strong>migration_type</strong></td> -<td>‘timestamp’</td> -<td>‘timestamp’ / ‘sequential’</td> -<td>The type of numeric identifier used to name -migration files.</td> -</tr> -</tbody> -</table> -</div> -<div class="section" id="class-reference"> -<h2><a class="toc-backref" href="#id5">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> -<dl class="class"> -<dt id="CI_Migration"> -<em class="property">class </em><code class="descname">CI_Migration</code><a class="headerlink" href="#CI_Migration" title="Permalink to this definition">¶</a></dt> -<dd><dl class="method"> -<dt id="CI_Migration::current"> -<code class="descname">current</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Migration::current" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">TRUE if no migrations are found, current version string on success, FALSE on failure</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">mixed</td> -</tr> -</tbody> -</table> -<p>Migrates up to the current version (whatever is set for -<code class="docutils literal"><span class="pre">$config['migration_version']</span></code> in <em>application/config/migration.php</em>).</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_Migration::error_string"> -<code class="descname">error_string</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Migration::error_string" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Error messages</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td> -</tr> -</tbody> -</table> -<p>This returns a string of errors that were detected while performing a migration.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_Migration::find_migrations"> -<code class="descname">find_migrations</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Migration::find_migrations" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">An array of migration files</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td> -</tr> -</tbody> -</table> -<p>An array of migration filenames are returned that are found in the <strong>migration_path</strong> property.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_Migration::latest"> -<code class="descname">latest</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Migration::latest" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Current version string on success, FALSE on failure</td> -</tr> -<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">mixed</td> -</tr> -</tbody> -</table> -<p>This works much the same way as <code class="docutils literal"><span class="pre">current()</span></code> but instead of looking for -the <code class="docutils literal"><span class="pre">$config['migration_version']</span></code> the Migration class will use the very -newest migration found in the filesystem.</p> -</dd></dl> - -<dl class="method"> -<dt id="CI_Migration::version"> -<code class="descname">version</code><span class="sig-paren">(</span><em>$target_version</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Migration::version" title="Permalink to this definition">¶</a></dt> -<dd><table class="docutils field-list" frame="void" rules="none"> -<col class="field-name" /> -<col class="field-body" /> -<tbody valign="top"> -<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> -<li><strong>$target_version</strong> (<em>mixed</em>) – Migration version to process</li> -</ul> -</td> -</tr> -<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE if no migrations are found, current version string on success, FALSE on failure</p> -</td> -</tr> -<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> -</td> -</tr> -</tbody> -</table> -<p>Version can be used to roll back changes or step forwards programmatically to -specific versions. It works just like <code class="docutils literal"><span class="pre">current()</span></code> but ignores <code class="docutils literal"><span class="pre">$config['migration_version']</span></code>.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">migration</span><span class="o">-></span><span class="na">version</span><span class="p">(</span><span class="mi">5</span><span class="p">);</span> -</pre></div> -</div> -</dd></dl> - -</dd></dl> - -</div> -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="output.html" class="btn btn-neutral float-right" title="Output Class">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="loader.html" class="btn btn-neutral" title="Loader Class"><span class="fa fa-arrow-circle-left"></span> Previous</a> - - </div> - - - <hr/> - - <div role="contentinfo"> - <p> - © Copyright 2014 - 2018, British Columbia Institute of Technology. - Last updated on Jan 13, 2018. - </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:'3.1.7', - 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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