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POYii - Query Manipulation for Custom CGridView with Advanced Search
 

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  1. POYii - Query Manipulation for Custom CGridView with Advanced Search
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    <p>So, I've extended <a href="http://www.yiiframework.com/doc/api/1.1/CGridView" rel="noreferrer">CGridView</a> to include an Advanced Search feature tailored to the needs of my organization. </p> <ul> <li><strong>Filter</strong> - lets you show/hide columns in the table, and you can also reorder columns by dragging the little drag icon to the left of each item.</li> <li><strong>Sort</strong> - Allows for the selection of multiple columns, specify Ascending or Descending.</li> <li><strong>Search</strong> - Select your column and insert search parameters. Operators tailored to data type of selected column.</li> </ul> <p><img src="https://i.stack.imgur.com/z1LDi.png" alt="Advanced Search Screenshot"></p> <p>Version 1 works, albeit slowly. Basically, I had my hands in the inner workings of <a href="http://www.yiiframework.com/doc/api/1.1/CGridView" rel="noreferrer">CGridView</a>, where I snatch the results from the <a href="http://www.yiiframework.com/doc/api/1.1/CActiveDataProvider" rel="noreferrer">DataProvider</a> and do the searching and sorting in PHP before rendering the table contents.</p> <p>Now writing Version 2, where I aim to focus on clever <a href="http://www.yiiframework.com/doc/api/1.1/CDbCriteria" rel="noreferrer">CDbCriteria</a> creation, allowing MySQL to do the heavy lifting so it will run quicker. The implementation is trivial when dealing with a single database table. The difficulty arises when I'm dealing with 2 or more tables... For example, if the user intends to search on a field that is a <a href="http://www.yiiframework.com/doc/guide/1.1/en/database.arr#statistical-query" rel="noreferrer">STAT</a> relation, I need that relation to be present in my query so that I may include comparisons.</p> <p><strong>Here's the question. How do I assure that Yii includes all <code>with</code> relations in my query so that I include comparisons?</strong> I've included all my relations <code>with</code> my criteria in the model's <code>search</code> function and I've tried CDbCriteria's <code>together</code> set to true ...</p> <pre><code>public function search() { $criteria=new CDbCriteria; $criteria-&gt;compare('id', $this-&gt;id); $criteria-&gt;compare( ... ... $criteria-&gt;with = array('relation0','relation1','relation3'); $criteria-&gt;together = true; return new CActiveDataProvider( get_class($this), array( 'criteria'=&gt;$criteria, 'pagination' =&gt; array('pageSize' =&gt; 50) ));} </code></pre> <p>Then I'll snatch the criteria from the <a href="http://www.yiiframework.com/doc/api/1.1/CActiveDataProvider" rel="noreferrer">DataProvider</a> and <a href="http://www.yiiframework.com/doc/api/1.1/CDbCriteria#addCondition-detail" rel="noreferrer">add a few conditions</a>, for example, looking for dates > 1234567890. But I still get errors like this...</p> <pre><code>CDbCommand failed to execute the SQL statement: SQLSTATE[42S22]: Column not found: 1054 Unknown column 't.relation3' in 'where clause'. The SQL statement executed was: SELECT COUNT(DISTINCT `t`.`id`) FROM `table` `t` LEFT OUTER JOIN `relation_table` `relation0` ON (`t`.`id`=`relation0`.`id`) LEFT OUTER JOIN `relation_table` `relation1` ON (`t`.`id`=`relation1`.`id`) WHERE (`t`.`relation3` &gt; 1234567890) </code></pre> <p>Where <code>relation0</code> and <code>relation1</code> are <code>BELONGS_TO</code> relations, but any <code>STAT</code> relations, here depicted as <code>relation3</code>, are missing. Furthermore, why is the query a <code>SELECT COUNT(DISTINCT 't'.'id')</code> ?</p> <p><strong>Edit</strong> @DCoder Here's the specific relation I'm working with now. The main table is Call, which has a <a href="http://www.yiiframework.com/doc/guide/1.1/en/database.arr#declaring-relationship" rel="noreferrer"><code>HAS_MANY</code></a> relation to CallSegments, which keeps the times. So the <code>startTime</code> of the Call is the minimum start_time of all the related CallSegments. And <code>startTime</code> is the hypothetical <code>relation3</code> in my anonymized query error.</p> <pre><code>'startTime' =&gt; array(self::STAT, 'CallSegments', 'call_id', 'select' =&gt; 'min(`start_time`)'), </code></pre> <p><strong>Edit</strong> Other people have sent me to <a href="http://www.yiiframework.com/doc/api/1.1/CDbCriteria#together-detail" rel="noreferrer">CDbCriteria's <code>together</code> property</a>, but as you can see above, I am currently trying that to no avail.</p> <p><strong>Edit</strong> Looks like the issue <strike>has</strike> may have been reported: <a href="http://code.google.com/p/yii/issues/detail?id=2494" rel="noreferrer">Yii</a> and <a href="https://github.com/yiisoft/yii/issues/204" rel="noreferrer">github</a> tickets.</p>
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    1. COCan you show more related code, specifically the model's relation declarations? STAT relations are usually executed as separate queries.
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    2. COAlright @DCoder , I've added the relation I'm working with now. Do you want more? Any way to include the STAT relation in the query? I thought that's what CDbCriteria's together was for, but apparently not.
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    3. COIt's still not clear to me what your anonymized relation0, relation1 and relation3 are, but I think that you will need to select call_id and min(start_time) into a temp table and join into that table instead of relying on STAT. If your database engine supports computed columns, that can be a decent alternative.
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