function exclude()
{
foreach (func_get_args() as $Q) {
$this->constraints[] = $Q instanceof Util\Q ? $Q->negate() : Util\Q::not($Q);
}
return $this;
}
/**
* compileQ
*
* Build a constraint represented in an arbitrarily nested Q instance.
* The placement of the compiled constraint is also considered and
* represented in the resulting CompiledExpression instance.
*
* Parameters:
* $Q - (Util\Q) constraint represented in a Q instance
* $model - (string) root model class for all the field references in
* the Util\Q instance
* $slot - (int) slot for inputs to be placed. Useful to differenciate
* inputs placed in the joins and where clauses for SQL backends
* which do not support named parameters.
*
* Returns:
* (CompiledExpression) object containing the compiled expression (with
* AND, OR, and NOT operators added). Furthermore, the $type attribute
* of the CompiledExpression will allow the compiler to place the
* constraint properly in the WHERE or HAVING clause appropriately.
*/
function compileQ(Util\Q $Q, $model, $slot = false)
{
$filter = array();
$type = CompiledExpression::TYPE_WHERE;
foreach ($Q->constraints as $field => $value) {
// Handle nested constraints
if ($value instanceof Util\Q) {
$filter[] = $T = $this->compileQ($value, $model, $slot);
// Bubble up HAVING constraints
if ($T instanceof CompiledExpression && $T->type == CompiledExpression::TYPE_HAVING) {
$type = $T->type;
}
} elseif ($value instanceof Model\ModelBase) {
$criteria = array();
foreach ($value->pk as $f => $v) {
$f = $field . '__' . $f;
$criteria[$f] = $v;
}
$filter[] = $this->compileQ(new Util\Q($criteria), $model, $slot);
} else {
list($field, $op) = $this->getField($field, $model);
if ($field instanceof Util\Aggregate) {
// This constraint has to go in the HAVING clause
$field = $field->toSql($this, $model);
$type = CompiledExpression::TYPE_HAVING;
}
if ($value === null) {
$filter[] = sprintf('%s IS NULL', $field);
} elseif ($value instanceof Util\Field) {
$filter[] = sprintf($op, $field, $value->toSql($this, $model));
} elseif (is_callable($op)) {
$filter[] = call_user_func($op, $field, $value, $model);
} else {
$filter[] = sprintf($op, $field, $this->input($value, $slot));
}
}
}
$glue = $Q->isOred() ? ' OR ' : ' AND ';
$clause = implode($glue, $filter);
if (count($filter) > 1) {
$clause = '(' . $clause . ')';
}
if ($Q->isNegated()) {
$clause = 'NOT ' . $clause;
}
return new CompiledExpression($clause, $type);
}
