[#82] BaseDataWindow: Fixed error handling after first error to allow saving changes

Elwig/Windows/BaseDataWindow.xaml.Mod.cs

@@ -48,30 +48,30 @@ namespace Elwig.Windows {
             if (!_modChanged || _modList == null || _mods == null || _modIds == null)
                 return;
 
+            var year = (SeasonList.SelectedItem as Season)?.Year;
             int i = 0;
             foreach (var mod in _modList) mod.Ordering = ++i;
 
-            var year = (SeasonList.SelectedItem as Season)?.Year;
-            foreach (var (modid, _) in _mods.Where(m => m.Value == null)) {
-                ctx.Remove(ctx.Modifiers.Find(year, modid)!);
-            }
-            foreach (var (mod, old) in _modIds) {
-                mod.ModId = old;
-            }
-            foreach (var (old, modid) in _mods.Where(m => m.Value != null)) {
-                ctx.Update(ctx.Modifiers.Find(year, old)!);
-            }
-            await ctx.SaveChangesAsync();
+            // delete
+            var deleteModIds = _mods.Where(b => b.Value == null).Select(b => b.Key).ToList();
+            await ctx.Modifiers.Where(b => b.Year == year && deleteModIds.Contains(b.ModId)).ExecuteDeleteAsync();
 
+            // update
+            ctx.UpdateRange(_modList
+                .Where(_modIds.ContainsKey)
+                .Select(m => {
+                    m.ModId = _modIds[m];
+                    ctx.Entry(m).State = EntityState.Added;
+                    return m;
+                }));
+            await ctx.SaveChangesAsync();
             foreach (var (old, modid) in _mods.Where(m => m.Value != null)) {
                 await ctx.Database.ExecuteSqlAsync($"UPDATE modifier SET modid = {modid} WHERE (year, modid) = ({year}, {old})");
             }
-            await ctx.SaveChangesAsync();
 
-            foreach (var mod in _modList.Where(m => !_modIds.ContainsKey(m))) {
-                if (mod.ModId == null) continue;
-                await ctx.AddAsync(mod);
-            }
+            // insert
+            ctx.AddRange(_modList
+                .Where(m => !_modIds.ContainsKey(m) && m.ModId != null));
             await ctx.SaveChangesAsync();
         }