How sort CgridView using a 'count' columne - php

Question

Situation: CausalType 1 -> N Causal
Into admin view for causaltype, i'm using cgridview, and I must show the number of causala of each causalType.
I setup the relation into CausalType
return array(
"causals" => array (self::HAS_MANY, "Causal", "causalTypeId" ),
);
I added class variable
public $activeCausalCount;
and this is the column in admin view
array (
'name' => 'activeCausalCount',
'value' => 'count($data->causals)',
),
Actually this is my criteria in search()
$criteria=new CDbCriteria;
$criteria->compare('id',$this->id,true);
$criteria->compare('name',$this->name,true);
$criteria->compare('isActive',$this->isActive);
The count of causal of each type is correct, but I've some problem
1) I need to count only ACTIVE causals (count causals where causals.isActive = 1)
2) I need to sort the column
3) I need to filter (by integer)

Answer 1

If you really need sorting and filtering on COUNT, then that can be little big process.
one way is...
Add a column to your CausalType table ( call it activeCausals )
define a relation in CausalType model
"totalActiveCasuals" => array(
self::STAT,
"Causal",
"causalTypeId",
'condition'=>'totalActiveCasuals.isActive=1'
),
and define afterSave method in Causal
protected function afterSave()
{
$this->causaltype->activeCausals = $this->causaltype->totalActiveCasuals;
$this->causaltype->save();
return parent::afterSave();
}
now you can filter, sort on new column activeCausals very very easily.

Answer 2

Add a new relation to your CasualType of type STAT like this:
return array(
"casuals" => array (self::HAS_MANY, "Causal", "causalTypeId" ),
"totalCasuals" => array (self::STAT, "Causal", "causalTypeId" ),
"totalActiveCasuals" => array (self::STAT, "Causal", "causalTypeId", 'condition' => 'active = true' ),
);
then in your view just use it as a normal attribute/relation