/**
* Normalize field
*
* @param Model $model Model
* @param string $field Name of the field
* @return string
*/
private function normalizeField(Model $model, $field)
{
// @codingStandardsIgnoreLine
if ($model->hasField($field)) {
$field = $model->alias . '.' . $field;
} elseif ($model->isVirtualField($field)) {
$db = $model->getDataSource();
$field = $model->getVirtualField($field);
$field = $db->dispatchMethod('_quoteFields', array($field));
$field = '(' . $field . ')';
}
return $field;
}
/**
* Create a GROUP BY SQL clause.
*
* @param string|array $fields Group By fields
* @param Model $Model The model to get group by fields for.
* @return string Group By clause or null.
*/
public function group($fields, Model $Model = null)
{
if (empty($fields)) {
return null;
}
if (!is_array($fields)) {
$fields = array($fields);
}
if ($Model !== null) {
foreach ($fields as $index => $key) {
if ($Model->isVirtualField($key)) {
$fields[$index] = '(' . $Model->getVirtualField($key) . ')';
}
}
}
$fields = implode(', ', $fields);
return ' GROUP BY ' . $this->_quoteFields($fields);
}
/**
* Returns an SQL calculation, i.e. COUNT() or MAX()
*
* @param Model $Model The model to get a calculated field for.
* @param string $func Lowercase name of SQL function, i.e. 'count' or 'max'
* @param array $params Function parameters (any values must be quoted manually)
*
* @return string An SQL calculation function
*/
public function calculate(Model $Model, $func, $params = array())
{
$params = (array) $params;
switch (strtolower($func)) {
case 'count':
if (!isset($params[0])) {
$params[0] = '*';
}
if (!isset($params[1])) {
$params[1] = 'count';
}
if ($Model->isVirtualField($params[0])) {
$arg = $this->_quoteFields($Model->getVirtualField($params[0]));
} else {
$arg = $this->name($params[0]);
}
return 'COUNT(' . $arg . ') AS ' . $this->name($params[1]);
case 'max':
case 'min':
if (!isset($params[1])) {
$params[1] = $params[0];
}
if ($Model->isVirtualField($params[0])) {
$arg = $this->_quoteFields($Model->getVirtualField($params[0]));
} else {
$arg = $this->name($params[0]);
}
return strtoupper($func) . '(' . $arg . ') AS ' . $this->name($params[1]);
}
}
