person deletion method overload

app/admin.py

@@ -9,6 +9,7 @@ from django.http import HttpResponse
 import csv
 from django import forms
 from django.contrib.admin.widgets import AutocompleteSelect
+from django.contrib import messages  # import messages
 
 
 class autocomplete_fields_form(forms.ModelForm):
@@ -124,6 +125,81 @@ class PersonAdmin(admin.ModelAdmin):
                 'country', 'organisation_english', 'organisation_2', 'organisation_3', 'acronym')
         return queryset
 
+    def get_actions(self, request):
+        actions = super().get_actions(request)
+        if 'delete_selected' in actions:
+            del actions['delete_selected']
+        return actions
+
+    def delete_model(self, request, obj):
+        self.delete_person(request, obj)
+        return super(PersonAdmin, self).delete_model(request, obj)
+
+    def delete_person(self, request, obj):
+        taxa_people = TaxaPeople.objects.filter(person=obj.id)
+        for i in taxa_people:
+            i.delete()
+        ranges_people = RangesPeople.objects.filter(person=obj.id)
+        for i in ranges_people:
+            i.delete()
+        resources_people = ResourcesPeople.objects.filter(person=obj.id)
+        for i in resources_people:
+            i.delete()
+        scales_people = ScalesPeople.objects.filter(person=obj.id)
+        for i in scales_people:
+            i.delete()
+        people_function = PeopleFunction.objects.filter(person=obj.id)
+        for i in people_function:
+            i.delete()
+        people_range = PeopleRange.objects.filter(person=obj.id)
+        for i in people_range:
+            i.delete()
+        people_resources = PeopleResource.objects.filter(person=obj.id)
+        for i in people_resources:
+            i.delete()
+        fields_people = FieldsPeople.objects.filter(person=obj.id)
+        for i in fields_people:
+            i.delete()
+        methods_people = MethodsPeople.objects.filter(person=obj.id)
+        for i in methods_people:
+            i.delete()
+
+    def delete_persons(self, request, obj):
+        for o in obj.all():
+            taxa_people = TaxaPeople.objects.filter(person=o.id)
+            for i in taxa_people:
+                i.delete()
+            ranges_people = RangesPeople.objects.filter(person=o.id)
+            for i in ranges_people:
+                i.delete()
+            resources_people = ResourcesPeople.objects.filter(person=o.id)
+            for i in resources_people:
+                i.delete()
+            scales_people = ScalesPeople.objects.filter(person=o.id)
+            for i in scales_people:
+                i.delete()
+            people_function = PeopleFunction.objects.filter(person=o.id)
+            for i in people_function:
+                i.delete()
+            people_range = PeopleRange.objects.filter(person=o.id)
+            for i in people_range:
+                i.delete()
+            people_resources = PeopleResource.objects.filter(person=o.id)
+            for i in people_resources:
+                i.delete()
+            fields_people = FieldsPeople.objects.filter(person=o.id)
+            for i in fields_people:
+                i.delete()
+            methods_people = MethodsPeople.objects.filter(person=o.id)
+            for i in methods_people:
+                i.delete()
+            o.delete()
+        messages.success(request, "Successfully deleted")
+
+    delete_persons.short_description = 'Delete Person & Related Fields'
+
+    actions = [download_csv, delete_persons]
+
 
 class ResourceKeywordInline(admin.TabularInline):
     autocomplete_fields = ['keyword']
@@ -192,7 +268,26 @@ class ResourceAdmin(admin.ModelAdmin):
             del actions['delete_selected']
         return actions
 
+    def delete_model(self, request, obj):
+        self.delete_resource(request, obj)
+        return super(ResourceAdmin, self).delete_model(request, obj)
+
     def delete_resource(self, request, obj):
+        resource_keyword = ResourceKeyword.objects.filter(resource=obj.id)
+        for i in resource_keyword:
+            i.delete()
+        resource_range = ResourceRange.objects.filter(resource_title=obj.id)
+        for i in resource_range:
+            i.delete()
+        resource_people = ResourcesPeople.objects.filter(resource=obj.id)
+        for i in resource_people:
+            i.delete()
+        resource_people_resource = PeopleResource.objects.filter(
+            resource=obj.id)
+        for i in resource_people_resource:
+            i.delete()
+
+    def delete_resources(self, request, obj):
         for o in obj.all():
             resource_keyword = ResourceKeyword.objects.filter(resource=o.id)
             for i in resource_keyword:
@@ -208,9 +303,10 @@ class ResourceAdmin(admin.ModelAdmin):
             for i in resource_people_resource:
                 i.delete()
             o.delete()
-    delete_resource.short_description = 'Delete Resource & Related Fields'
+        messages.success(request, "Successfully deleted")
+    delete_resources.short_description = 'Delete Resource & Related Fields'
 
-    actions = [download_csv, delete_resource]
+    actions = [download_csv, delete_resources]
 
 
 class RangeNameTranslationInline(admin.TabularInline):