How to iterate over Yii CActiveDataProvider object?

Question

How to iterate over a dataprovider object? I want to access the \'name\' field of each row returned and build a list. Can you help?

Table structure for table

Answer 1

If you need itarate large data collection and you worry about memory usage do this:

$dataProvider = new CActiveDataProvider('Categories');
$iterator = new CDataProviderIterator($dataProvider);
foreach($iterator as $category) {
   print_r($category);
}

CDataProviderIterator allows iteration over large data sets without holding the entire set in memory.

some performance tests

Test                        Time (seconds)          Memory (bytes)
CDbDataReader               4.9158580303192         28339952
CActiveRecord::findAll()    5.8891110420227         321388376
CDataProviderIterator       6.101970911026          31170504