Fix ComputerSystem.ManagedBy access

This is an array of links to Managers. We had been just collecting the
strings for the URIs, but to make this consistent with how other related
objects are handled this makes the objects themselves accessible by a
method call.

Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

redfish/computersystem.go

@@ -915,10 +915,7 @@ type ComputerSystem struct {
 	// settingsApplyTimes is a set of allowed settings update apply times. If none
 	// are specified, then the system does not provide that information.
 	settingsApplyTimes []common.ApplyTime
-	// ManagedBy An array of references to the Managers responsible for this system.
-	// This is temporary until a proper method can be implemented to actually
-	// retrieve those objects directly.
-	ManagedBy []string
+	managedBy          []string
 
 	// addResourceBlockTarget is the internal URL for the AddResourceBlock action.
 	addResourceBlockTarget string
@@ -1009,7 +1006,7 @@ func (computersystem *ComputerSystem) UnmarshalJSON(b []byte) error {
 	computersystem.setDefaultBootOrderTarget = t.Actions.SetDefaultBootOrder.Target
 
 	computersystem.chassis = t.Links.Chassis.ToStrings()
-	computersystem.ManagedBy = t.Links.ManagedBy.ToStrings()
+	computersystem.managedBy = t.Links.ManagedBy.ToStrings()
 	computersystem.settingsApplyTimes = t.Settings.SupportedApplyTimes
 
 	// Some implementations use a @Redfish.Settings object to direct settings updates to a
@@ -1170,6 +1167,27 @@ func (computersystem *ComputerSystem) LogServices() ([]*LogService, error) {
 	return ListReferencedLogServices(computersystem.GetClient(), computersystem.logServices)
 }
 
+// ManagedBy gets all Managers for this system.
+func (computersystem *ComputerSystem) ManagedBy() ([]*Manager, error) {
+	var result []*Manager
+
+	collectionError := common.NewCollectionError()
+	for _, uri := range computersystem.managedBy {
+		manager, err := GetManager(computersystem.GetClient(), uri)
+		if err != nil {
+			collectionError.Failures[uri] = err
+		} else {
+			result = append(result, manager)
+		}
+	}
+
+	if collectionError.Empty() {
+		return result, nil
+	}
+
+	return result, collectionError
+}
+
 // Memory gets this system's memory.
 func (computersystem *ComputerSystem) Memory() ([]*Memory, error) {
 	return ListReferencedMemorys(computersystem.GetClient(), computersystem.memory)

redfish/computersystem_test.go

@@ -304,11 +304,11 @@ func TestComputerSystem(t *testing.T) { //nolint
 		t.Errorf("Invalid allowable reset actions, expected 6, got %d",
 			len(result.SupportedResetTypes))
 	}
-	if len(result.ManagedBy) != 1 {
-		t.Errorf("Received invalid number of ManagedBy: %d", len(result.ManagedBy))
+	if len(result.managedBy) != 1 {
+		t.Errorf("Received invalid number of ManagedBy: %d", len(result.managedBy))
 	}
-	if result.ManagedBy[0] != "/redfish/v1/Managers/BMC-1" {
-		t.Errorf("Received invalid Managers reference: %s", result.ManagedBy[0])
+	if result.managedBy[0] != "/redfish/v1/Managers/BMC-1" {
+		t.Errorf("Received invalid Managers reference: %s", result.managedBy[0])
 	}
 }