eventespresso / event-espresso-core

		// 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' );

		EE_Registry::instance()->load_helper( 'DTT_Helper' );

	 */

	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];

	}

	 */

	private function _prepare_operator_for_sql($operator_supplied){

		$sql_operator = isset($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))));

		}

	}

	/**