fix(roles): Handle issue with duplicate IDs cause 400 despite using existing resources

internal/resources/grafana/resource_role_assignment_item.go

@@ -163,7 +163,17 @@ func (r *resourceRoleAssignmentItem) Create(ctx context.Context, req resource.Cr
 			resp.Diagnostics.AddError("Failed to parse team ID", err.Error())
 			return
 		}
-		roleAssignments.Teams = append(roleAssignments.Teams, teamID)
+		// Check if team is already assigned to avoid duplicates
+		teamExists := false
+		for _, existingTeamID := range roleAssignments.Teams {
+			if existingTeamID == teamID {
+				teamExists = true
+				break
+			}
+		}
+		if !teamExists {
+			roleAssignments.Teams = append(roleAssignments.Teams, teamID)
+		}
 		assignmentType = "team"
 		resourceID = teamIDStr
 	case !data.UserID.IsNull():
@@ -172,7 +182,17 @@ func (r *resourceRoleAssignmentItem) Create(ctx context.Context, req resource.Cr
 			resp.Diagnostics.AddError("Failed to parse user ID", err.Error())
 			return
 		}
-		roleAssignments.Users = append(roleAssignments.Users, userID)
+		// Check if user is already assigned to avoid duplicates
+		userExists := false
+		for _, existingUserID := range roleAssignments.Users {
+			if existingUserID == userID {
+				userExists = true
+				break
+			}
+		}
+		if !userExists {
+			roleAssignments.Users = append(roleAssignments.Users, userID)
+		}
 		assignmentType = "user"
 		resourceID = data.UserID.ValueString()
 	case !data.ServiceAccountID.IsNull():
@@ -182,7 +202,17 @@ func (r *resourceRoleAssignmentItem) Create(ctx context.Context, req resource.Cr
 			resp.Diagnostics.AddError("Failed to parse service account ID", err.Error())
 			return
 		}
-		roleAssignments.ServiceAccounts = append(roleAssignments.ServiceAccounts, serviceAccountID)
+		// Check if service account is already assigned to avoid duplicates
+		saExists := false
+		for _, existingSAID := range roleAssignments.ServiceAccounts {
+			if existingSAID == serviceAccountID {
+				saExists = true
+				break
+			}
+		}
+		if !saExists {
+			roleAssignments.ServiceAccounts = append(roleAssignments.ServiceAccounts, serviceAccountID)
+		}
 		assignmentType = "service_account"
 		resourceID = serviceAccountIDStr
 	}

internal/resources/grafana/resource_role_assignment_item_test.go

@@ -121,6 +121,29 @@ func TestAccRoleAssignmentItem_withCloudServiceAccount(t *testing.T) {
 	})
 }
 
+func TestAccRoleAssignmentItem_NoDuplicates(t *testing.T) {
+	testutils.CheckEnterpriseTestsEnabled(t, ">=9.0.0")
+
+	testName := acctest.RandString(10)
+	var role models.RoleDTO
+
+	resource.ParallelTest(t, resource.TestCase{
+		ProtoV5ProviderFactories: testutils.ProtoV5ProviderFactories,
+		CheckDestroy:             roleAssignmentCheckExists.destroyed(&role, nil),
+		Steps: []resource.TestStep{
+			{
+				Config: roleAssignmentItemNoDuplicatesConfig(testName),
+				Check: resource.ComposeTestCheckFunc(
+					roleAssignmentCheckExists.exists("grafana_role.test", &role),
+					// Verify the role assignment doesn't contain duplicates
+					resource.TestCheckResourceAttr("grafana_role_assignment_item.user1", "role_uid", testName),
+					resource.TestCheckResourceAttr("grafana_role_assignment_item.team", "role_uid", testName),
+				),
+			},
+		},
+	})
+}
+
 func roleAssignmentItemConfig(name string) string {
 	return fmt.Sprintf(`
 resource "grafana_role" "test" {
@@ -289,3 +312,46 @@ resource "grafana_role_assignment_item" "service_account" {
 }
 `, name)
 }
+
+func roleAssignmentItemNoDuplicatesConfig(name string) string {
+	return fmt.Sprintf(`
+// Create a test role that will have multiple assignments
+// This role will be the target for both user and team assignments
+resource "grafana_role" "test" {
+	name  = "%[1]s"
+	description = "test desc"
+	version = 1
+	uid = "%[1]s"
+	global = true
+	group = "testgroup"
+	display_name = "testdisplay"
+	hidden = true
+}
+
+// Create a test team that will be assigned to the role
+resource "grafana_team" "test_team" {
+	name = "%[1]s"
+}
+
+// Create a test user that will be assigned to the same role
+resource "grafana_user" "test_user" {
+	email = "%[1][email protected]"
+	login    = "%[1][email protected]"
+	password = "12345"
+}
+
+// Multiple grafana_role_assignment_item resources targeting the SAME role.
+// This setup reproduces the bug where duplicate assignments could be created
+// when multiple assignment items reference the same role UID.
+
+resource grafana_role_assignment_item "user1" {
+	role_uid = grafana_role.test.uid // Same role as team assignment
+	user_id  = grafana_user.test_user.id
+}
+
+resource grafana_role_assignment_item "team" {
+	role_uid = grafana_role.test.uid // Same role as user1 assignment
+	team_id = grafana_team.test_team.id
+}
+`, name)
+}

pkg/generate/postprocessing/replace_references.go

@@ -142,6 +142,9 @@ var knownReferences = []string{
 	"grafana_team_external_group.team_id=grafana_team.id",
 	"grafana_team_preferences.home_dashboard_uid=grafana_dashboard.uid",
 	"grafana_team_preferences.team_id=grafana_team.id",
+	"grafana_user.role_uid=grafana_role.uid",
+	"grafana_user.team_id=grafana_team.id",
+	"grafana_user.user_id=grafana_user.id",
 }
 
 func ReplaceReferences(fpath string, plannedState *tfjson.Plan, extraKnownReferences []string) error {