Gdn_Validation::applyRulesBySchema PHP Method

    protected function applyRulesBySchema()
    {
        $this->_SchemaRules = array();
        foreach ($this->_Schema as $Field => $Properties) {
            if (is_scalar($Properties) || $Properties === null) {
                // Some code passes a record as a schema so account for that here.
                $Properties = array('AutoIncrement' => false, 'AllowNull' => true, 'Type' => 'text', 'Length' => '');
                $Properties = (object) $Properties;
            }
            // Create an array to hold rules for this field
            $RuleNames = array();
            // Force non-null fields without defaults to be required.
            if ($Properties->AllowNull === false && $Properties->Default == '') {
                $RuleNames[] = 'Required';
            }
            // Force other constraints based on field type.
            switch ($Properties->Type) {
                case 'bit':
                case 'bool':
                case 'boolean':
                    $RuleNames[] = 'Boolean';
                    break;
                case 'tinyint':
                case 'smallint':
                case 'mediumint':
                case 'int':
                case 'integer':
                case 'bigint':
                    $RuleNames[] = 'Integer';
                    break;
                case 'double':
                case 'float':
                case 'real':
                case 'decimal':
                case 'dec':
                case 'numeric':
                case 'fixed':
                    $RuleNames[] = 'Decimal';
                    break;
                case 'date':
                case 'datetime':
                    $RuleNames[] = 'Date';
                    break;
                case 'time':
                    $RuleNames[] = 'Time';
                    break;
                case 'year':
                    $RuleNames[] = 'Year';
                    break;
                case 'timestamp':
                    $RuleNames[] = 'Timestamp';
                    break;
                case 'char':
                case 'varchar':
                case 'tinyblob':
                case 'blob':
                case 'mediumblob':
                case 'longblob':
                case 'tinytext':
                case 'mediumtext':
                case 'text':
                case 'longtext':
                case 'binary':
                case 'varbinary':
                    if (!in_array($Field, array('Attributes', 'Data', 'Preferences', 'Permissions'))) {
                        $RuleNames[] = 'String';
                    }
                    if ($Properties->Length != '') {
                        $RuleNames[] = 'Length';
                    }
                    break;
                case 'enum':
                case 'set':
                    $RuleNames[] = 'Enum';
                    break;
            }
            if ($Field == 'Format') {
                $RuleNames[] = 'Format';
            }
            // Assign the rules to the field.
            // echo '<div>Field: '.$Field.'</div>';
            // print_r($RuleNames);
            $this->applyRuleTo($this->_SchemaRules, $Field, $RuleNames);
        }
    }