init

OpenArchival.Blazor.AdminPages/HomePageEditor.razor

@@ -198,7 +198,8 @@
         }
 
         // Page content is already bound by the text editor so just save
-        context.Update(_homePageConfiguration);
+        context.HomePageConfiguration.Attach(_homePageConfiguration);
+        context.Entry(_homePageConfiguration).State = EntityState.Modified;
         await context.SaveChangesAsync();
 
         // Clear the memory cache of the home page values
@@ -247,23 +248,43 @@
 
         await using var context = await ContextFactory.CreateDbContextAsync();
 
-        // Attach all of the existing tags to the context
-        foreach (var tag in _selectedTags.Where(t => t.Id != 0))
+        // Attach the parent configuration first. This recursively attaches all loaded sliders and their tags as Unchanged.
+        context.HomePageConfiguration.Attach(_homePageConfiguration);
+
+        // Prepare the tags for the NEW entry. 
+        // We must ensure we use tracked instances if they are already in the context from the Attach above.
+        List<ArtifactEntryTag> tagsToUse = new();
+        foreach (var tag in _selectedTags)
         {
-            context.ArtifactEntryTags.Attach(tag);
+            if (tag.Id != 0)
+            {
+                var trackedTag = context.ArtifactEntryTags.Local.FirstOrDefault(t => t.Id == tag.Id);
+                if (trackedTag != null)
+                {
+                    tagsToUse.Add(trackedTag);
+                }
+                else
+                {
+                    context.ArtifactEntryTags.Attach(tag);
+                    tagsToUse.Add(tag);
+                }
+            }
+            else
+            {
+                tagsToUse.Add(tag);
+            }
         }
 
         var newEntry = new SearchPageSliderEntry()
             {
                 Title = _titleInputValue,
                 Description = _descriptionInputValue,
-                FilterTags = _selectedTags,
+                FilterTags = tagsToUse,
                 IsHomePageSlider = true,
                 HomePageConfiguration = _homePageConfiguration
             };
 
         _homePageConfiguration.SliderEntries!.Add(newEntry);
-        context.Update(_homePageConfiguration);
         await context.SaveChangesAsync();
 
         Snackbar.Add("Added slider", Severity.Success);