eventespresso / event-espresso-core

    public function related_settings_for($relation_name)

    {

        $relatedModels = $this->relation_settings();

        if ( ! array_key_exists($relation_name, $relatedModels)) {

            throw new EE_Error(

                sprintf(

                    __('Cannot get %s related to %s. There is no model relation of that type. There is, however, %s...',

                        'event_espresso'),

                    $relation_name,

                    $this->_get_class_name(),

                    implode(', ', array_keys($relatedModels))

                )

            );

        }

        return $relatedModels[$relation_name];

    }

    {

        $sql_operator = isset($this->_valid_operators[$operator_supplied]) ? $this->_valid_operators[$operator_supplied]

            : null;

        if ($sql_operator) {

            return $sql_operator;

        } else {

            throw new EE_Error(sprintf(__("The operator '%s' is not in the list of valid operators: %s",

                "event_espresso"), $operator_supplied, implode(",", array_keys($this->_valid_operators))));

        }

    }

		// EEH_Debug_Tools::printr( $fieldValues, '$fieldValues  <br /><span style="font-size:10px;font-weight:normal;">' . __FILE__ . '<br />line no: ' . __LINE__ . '</span>', 'auto' );

		// verify client code has not passed any invalid field names

		foreach($fieldValues as $field_name=> $field_value){

			if( ! isset( $model_fields[ $field_name] ) ){

				throw new EE_Error(sprintf(__("Invalid field (%s) passed to constructor of %s. Allowed fields are :%s", "event_espresso"),$field_name,get_class($this),implode(", ",array_keys($model_fields))));

			}

		}

		// EEH_Debug_Tools::printr( $model_fields, '$model_fields  <br /><span style="font-size:10px;font-weight:normal;">' . __FILE__ . '<br />line no: ' . __LINE__ . '</span>', 'auto' );

		$this->_timezone = EEH_DTT_Helper::get_valid_timezone_string( $timezone );