/**
* Creates a query that tests the given field for the given value.
* @param Field $field The field to test.
* @param string $operator The operator, must be '<', '>' or '='.
* @param mixed $value The value to test for.
* @return Query The query.
* @throws InvalidArgumentException When the operator is invalid.
*/
protected function where(Field $field, $operator, $value)
{
if ($operator === '=' || $operator === '<' || $operator === '>') {
return $this->whereRaw('`' . $field->getNameInDatabase() . '` ' . $operator . ' :value', [":value" => $field->serializeValue($value)]);
}
throw new InvalidArgumentException("Invalid operator: " . $operator);
}
/**
* Orders the results in descending order based on the value of this field.
* @param Field $field The field to sort on.
* @throws BadMethodCallException If {@link Field#needsJoin()} returns true.
* @return Query This object.
*/
public function orderDescending(Field $field)
{
if ($field->needsJoin()) {
throw new BadMethodCallException("Field " . $field->getName() . " needs a join, so cannot be used for sorting");
}
$this->orderByStrings[] = '`' . $field->getNameInDatabase() . "` DESC";
return $this;
}