rework objitem model

dbapp/mainapp/admin.py

@@ -98,6 +98,8 @@ class GeoInline(admin.StackedInline):
     verbose_name_plural = "Гео"
     form = LocationForm
     readonly_fields = ("distance_coords_kup", "distance_coords_valid", "distance_kup_valid")
+    prefetch_related = ("mirrors",)
+    autocomplete_fields = ('mirrors',)
     fieldsets = (
         ("Основная информация", {
             "fields": ("mirrors", "location", "distance_coords_kup", 
@@ -223,7 +225,7 @@ class ParameterAdmin(ImportExportActionModelAdmin, admin.ModelAdmin):
     )
     ordering = ("frequency",)
     list_select_related = ("polarization", "modulation", "standard", "id_satellite",)
-    filter_horizontal = ('objitems',)  # For many-to-many relationship
+    autocomplete_fields = ('objitems',)
     # raw_id_fields = ("id_sigma_parameter", )
     inlines = [SigmaParameterInline]
     # autocomplete_fields = ("id_sigma_parameter", )
@@ -402,44 +404,17 @@ def show_on_map(modeladmin, request, queryset):
 
 show_on_map.short_description = "Показать выбранные на карте"
 
-class ObjItemForm(forms.ModelForm):
-    parameter = forms.ModelChoiceField(
-        queryset=Parameter.objects.all(),
-        required=False,
-        label="Параметр"
-    )
-
-    class Meta:
-        model = ObjItem
-        fields = '__all__'
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        # Set initial value if the ObjItem already has a parameter
-        if self.instance.pk:
-            first_param = self.instance.parameters_obj.first()
-            if first_param:
-                self.fields['parameter'].initial = first_param
-
-    def save(self, commit=True):
-        instance = super().save(commit=commit)
-        
-        # Handle the single parameter assignment - replace all existing relationships
-        if self.cleaned_data.get('parameter'):
-            # Clear all existing parameter relationships
-            instance.parameters_obj.clear()
-            # Add the selected parameter
-            instance.parameters_obj.add(self.cleaned_data['parameter'])
-        else:
-            # If no parameter selected, clear all
-            instance.parameters_obj.clear()
-        
-        return instance
+class ParameterObjItemInline(admin.StackedInline):
+    model = ObjItem.parameters_obj.through  
+    extra = 0  
+    max_num = 1
+    verbose_name = "ВЧ загрузка"
+    verbose_name_plural = "ВЧ загрузки"
+    
 
 
 @admin.register(ObjItem)
 class ObjectAdmin(admin.ModelAdmin):
-    form = ObjItemForm
     list_display = (
         "name",
         "sat_name",
@@ -475,9 +450,11 @@ class ObjectAdmin(admin.ModelAdmin):
     )
     
     ordering = ("name",)
-    inlines = [GeoInline]
+    inlines = [ParameterObjItemInline, GeoInline]
     actions = [show_on_map]
 
+    
+
     def get_queryset(self, request):
         qs = super().get_queryset(request)
         return qs.select_related('geo_obj').prefetch_related(