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<title>update_counters (ActiveRecord::Base)</title>
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<pre><span class="ruby-comment cmt"># File lib/active_record/base.rb, line 948</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">update_counters</span>(<span class="ruby-identifier">id</span>, <span class="ruby-identifier">counters</span>)
<span class="ruby-identifier">updates</span> = <span class="ruby-identifier">counters</span>.<span class="ruby-identifier">inject</span>([]) { <span class="ruby-operator">|</span><span class="ruby-identifier">list</span>, (<span class="ruby-identifier">counter_name</span>, <span class="ruby-identifier">increment</span>)<span class="ruby-operator">|</span>
<span class="ruby-identifier">sign</span> = <span class="ruby-identifier">increment</span> <span class="ruby-operator"><</span> <span class="ruby-value">0</span> <span class="ruby-operator">?</span> <span class="ruby-value str">"-"</span> <span class="ruby-operator">:</span> <span class="ruby-value str">"+"</span>
<span class="ruby-identifier">list</span> <span class="ruby-operator"><<</span> <span class="ruby-node">"#{connection.quote_column_name(counter_name)} = COALESCE(#{connection.quote_column_name(counter_name)}, 0) #{sign} #{increment.abs}"</span>
}.<span class="ruby-identifier">join</span>(<span class="ruby-value str">", "</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">id</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Array</span>)
<span class="ruby-identifier">ids_list</span> = <span class="ruby-identifier">id</span>.<span class="ruby-identifier">map</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">i</span><span class="ruby-operator">|</span> <span class="ruby-identifier">quote_value</span>(<span class="ruby-identifier">i</span>)}.<span class="ruby-identifier">join</span>(<span class="ruby-value str">', '</span>)
<span class="ruby-identifier">condition</span> = <span class="ruby-node">"IN (#{ids_list})"</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">condition</span> = <span class="ruby-node">"= #{quote_value(id)}"</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">update_all</span>(<span class="ruby-identifier">updates</span>, <span class="ruby-node">"#{connection.quote_column_name(primary_key)} #{condition}"</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
>
136
