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<title>add_index (ActiveRecord::ConnectionAdapters::SchemaStatements)</title>
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<pre><span class="ruby-comment cmt"># File lib/active_record/connection_adapters/abstract/schema_statements.rb, line 261</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">add_index</span>(<span class="ruby-identifier">table_name</span>, <span class="ruby-identifier">column_name</span>, <span class="ruby-identifier">options</span> = {})
<span class="ruby-identifier">column_names</span> = <span class="ruby-constant">Array</span>(<span class="ruby-identifier">column_name</span>)
<span class="ruby-identifier">index_name</span> = <span class="ruby-identifier">index_name</span>(<span class="ruby-identifier">table_name</span>, <span class="ruby-identifier">:column</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">column_names</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-constant">Hash</span> <span class="ruby-operator">===</span> <span class="ruby-identifier">options</span> <span class="ruby-comment cmt"># legacy support, since this param was a string</span>
<span class="ruby-identifier">index_type</span> = <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:unique</span>] <span class="ruby-operator">?</span> <span class="ruby-value str">"UNIQUE"</span> <span class="ruby-operator">:</span> <span class="ruby-value str">""</span>
<span class="ruby-identifier">index_name</span> = <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:name</span>] <span class="ruby-operator">||</span> <span class="ruby-identifier">index_name</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">index_type</span> = <span class="ruby-identifier">options</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">quoted_column_names</span> = <span class="ruby-identifier">column_names</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">e</span><span class="ruby-operator">|</span> <span class="ruby-identifier">quote_column_name</span>(<span class="ruby-identifier">e</span>) }.<span class="ruby-identifier">join</span>(<span class="ruby-value str">", "</span>)
<span class="ruby-identifier">execute</span> <span class="ruby-node">"CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} (#{quoted_column_names})"</span>
<span class="ruby-keyword kw">end</span></pre>
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distrib
>
Mandriva
>
2010.0
>
i586
>
media
>
contrib-release
>
by-pkgid
>
d51872cc0e1fdee944d71993f94ac764
>
files
>
508
