ocket8888 commented on a change in pull request #4011: Implement GET 
/api/1.1/roles handler
URL: https://github.com/apache/trafficcontrol/pull/4011#discussion_r337709162
 
 

 ##########
 File path: traffic_ops/traffic_ops_golang/role/roles.go
 ##########
 @@ -159,16 +159,32 @@ func (role *TORole) deleteRoleCapabilityAssociations(tx 
*sqlx.Tx) (error, error,
 }
 
 func (role *TORole) Read() ([]interface{}, error, error, int) {
+       version := role.APIInfo().Version
+       if version == nil {
+               return nil, nil, errors.New("TORole.Read called with nil API 
version"), http.StatusInternalServerError
+       }
+       if version.Major != 1 || version.Minor < 1 {
+               return nil, nil, fmt.Errorf("TORole.Read called with invalid 
API version: %d.%d", version.Major, version.Minor), 
http.StatusInternalServerError
+       }
 
 Review comment:
   I don't think you need to do this, because that check ought to be caught by 
[some 
middleware](https://github.com/apache/trafficcontrol/blob/master/traffic_ops/traffic_ops_golang/routing/wrappers.go#L281-L287).

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