Changeset 0.28.0.1 (#173)

server/handlers/workflow_instances.go

@@ -133,7 +133,7 @@ type WorkflowChannelStatus struct {
 	CurrentStage    int             `json:"current_stage"`
 	StageData       json.RawMessage `json:"stage_data"`
 	Status          string          `json:"status"`
-	LastActivityAt  *time.Time      `json:"last_activity_at"`
+	LastActivityAt  *string         `json:"last_activity_at"`
 }
 
 // GetStatus returns the workflow state for a channel.
@@ -391,19 +391,19 @@ func (h *WorkflowInstanceHandler) tryRoundRobin(ctx context.Context, stage model
 	bestUserID = members[0].UserID // fallback to first member
 
 	rows, err := database.DB.QueryContext(ctx, database.Q(`
-		SELECT m.user_id, MAX(wa.claimed_at) as last_claim
+		SELECT m.user_id, COALESCE(MAX(wa.claimed_at), '1970-01-01T00:00:00Z') as last_claim
 		FROM team_members m
 		LEFT JOIN workflow_assignments wa ON wa.assigned_to = m.user_id AND wa.team_id = $1
 		WHERE m.team_id = $2
 		GROUP BY m.user_id
-		ORDER BY last_claim ASC NULLS FIRST
+		ORDER BY last_claim ASC
 		LIMIT 1
 	`), *stage.AssignmentTeamID, *stage.AssignmentTeamID)
 	if err == nil {
 		defer rows.Close()
 		if rows.Next() {
 			var uid string
-			var lastClaim *time.Time
+			var lastClaim string // COALESCE returns TEXT on both dialects
 			if err := rows.Scan(&uid, &lastClaim); err == nil {
 				bestUserID = uid
 			}