--- a/OrthancServer/Sources/OrthancRestApi/OrthancRestResources.cpp	Tue Jul 09 11:17:34 2024 +0200
+++ b/OrthancServer/Sources/OrthancRestApi/OrthancRestResources.cpp	Tue Jul 09 11:39:07 2024 +0200
@@ -3502,6 +3502,8 @@
         }
       }
 
+      std::set<std::string> labels;
+
       if (request.isMember(KEY_LABELS))  // New in Orthanc 1.12.0
       {
         for (Json::Value::ArrayIndex i = 0; i < request[KEY_LABELS].size(); i++)
@@ -3512,27 +3514,27 @@
           }
           else
           {
-            query.AddLabel(request[KEY_LABELS][i].asString());
+            labels.insert(request[KEY_LABELS][i].asString());
           }
         }
       }
 
-      query.SetLabelsConstraint(LabelsConstraint_All);
+      LabelsConstraint labelsConstraint = LabelsConstraint_All;
       
       if (request.isMember(KEY_LABELS_CONSTRAINT))
       {
         const std::string& s = request[KEY_LABELS_CONSTRAINT].asString();
         if (s == "All")
         {
-          query.SetLabelsConstraint(LabelsConstraint_All);
+          labelsConstraint = LabelsConstraint_All;
         }
         else if (s == "Any")
         {
-          query.SetLabelsConstraint(LabelsConstraint_Any);
+          labelsConstraint = LabelsConstraint_Any;
         }
         else if (s == "None")
         {
-          query.SetLabelsConstraint(LabelsConstraint_None);
+          labelsConstraint = LabelsConstraint_None;
         }
         else
         {
@@ -3541,7 +3543,7 @@
       }
       
       FindVisitor visitor(OrthancRestApi::GetDicomFormat(request, DicomToJsonFormat_Human), context.GetFindStorageAccessMode());
-      context.Apply(visitor, query, level, since, limit);
+      context.Apply(visitor, query, level, labels, labelsConstraint, since, limit);
       visitor.Answer(call.GetOutput(), context, level, expand, requestedTags);
     }
   }

--- a/OrthancServer/Sources/Search/DatabaseLookup.cpp	Tue Jul 09 11:17:34 2024 +0200
+++ b/OrthancServer/Sources/Search/DatabaseLookup.cpp	Tue Jul 09 11:39:07 2024 +0200
@@ -369,14 +369,4 @@
 
     return clone.release();
   }
-
-
-  void DatabaseLookup::AddLabel(const std::string& label)
-  {
-    if (!label.empty())
-    {
-      ServerToolbox::CheckValidLabel(label);
-      labels_.insert(label);
-    }
-  }
 }

--- a/OrthancServer/Sources/Search/DatabaseLookup.h	Tue Jul 09 11:17:34 2024 +0200
+++ b/OrthancServer/Sources/Search/DatabaseLookup.h	Tue Jul 09 11:39:07 2024 +0200
@@ -23,7 +23,6 @@
 
 #pragma once
 
-#include "../Search/ISqlLookupFormatter.h"
 #include "DicomTagConstraint.h"
 
 class DcmItem;
@@ -34,8 +33,6 @@
   {
   private:
     std::vector<DicomTagConstraint*>  constraints_;
-    std::set<std::string>             labels_;
-    LabelsConstraint                  labelsConstraint_;
 
     void AddDicomConstraintInternal(const DicomTag& tag,
                                     ValueRepresentation vr,
@@ -46,11 +43,6 @@
     void AddConstraintInternal(DicomTagConstraint* constraint);  // Takes ownership
 
   public:
-    DatabaseLookup() :
-      labelsConstraint_(LabelsConstraint_All)
-    {
-    }
-
     ~DatabaseLookup();
 
     DatabaseLookup* Clone() const;
@@ -97,22 +89,5 @@
     bool HasTag(const DicomTag& tag) const;
 
     void RemoveConstraint(const DicomTag& tag);
-
-    void AddLabel(const std::string& label);
-
-    void SetLabelsConstraint(LabelsConstraint constraint)
-    {
-      labelsConstraint_ = constraint;
-    }
-
-    const std::set<std::string>& GetLabels() const
-    {
-      return labels_;
-    }
-
-    LabelsConstraint GetLabelsConstraint() const
-    {
-      return labelsConstraint_;
-    }
   };
 }

--- a/OrthancServer/Sources/ServerContext.cpp	Tue Jul 09 11:17:34 2024 +0200
+++ b/OrthancServer/Sources/ServerContext.cpp	Tue Jul 09 11:39:07 2024 +0200
@@ -1534,6 +1534,8 @@
   void ServerContext::Apply(ILookupVisitor& visitor,
                             const DatabaseLookup& lookup,
                             ResourceType queryLevel,
+                            const std::set<std::string>& labels,
+                            LabelsConstraint labelsConstraint,
                             size_t since,
                             size_t limit)
   {    
@@ -1566,8 +1568,8 @@
       ResourceFinder finder(queryLevel, false /* TODO-FIND: don't expand for now */);
       finder.SetLimits(0, lookupLimit);
       finder.SetDatabaseLookup(*fastLookup);
-      finder.SetLabels(lookup.GetLabels());
-      finder.SetLabelsConstraint(lookup.GetLabelsConstraint());
+      finder.SetLabels(labels);
+      finder.SetLabelsConstraint(labelsConstraint);
 
       if (queryLevel != ResourceType_Instance)
       {
@@ -1601,8 +1603,7 @@
        * VERSION IN ORTHANC <= 1.12.4
        **/
 
-      GetIndex().ApplyLookupResources(resources, &instances, *fastLookup, queryLevel,
-                                      lookup.GetLabels(), lookup.GetLabelsConstraint(), lookupLimit);
+      GetIndex().ApplyLookupResources(resources, &instances, *fastLookup, queryLevel, labels, labelsConstraint, lookupLimit);
     }
 
     bool complete = (databaseLimit == 0 ||

--- a/OrthancServer/Sources/ServerContext.h	Tue Jul 09 11:17:34 2024 +0200
+++ b/OrthancServer/Sources/ServerContext.h	Tue Jul 09 11:39:07 2024 +0200
@@ -445,9 +445,20 @@
     void Apply(ILookupVisitor& visitor,
                const DatabaseLookup& lookup,
                ResourceType queryLevel,
+               const std::set<std::string>& labels,
+               LabelsConstraint labelsConstraint,
                size_t since,
                size_t limit);
 
+    void Apply(ILookupVisitor& visitor,
+               const DatabaseLookup& lookup,
+               ResourceType queryLevel,
+               size_t since,
+               size_t limit)
+    {
+      Apply(visitor, lookup, queryLevel, std::set<std::string>(), LabelsConstraint_All, since, limit);
+    }
+
     bool LookupOrReconstructMetadata(std::string& target,
                                      const std::string& publicId,
                                      ResourceType level,