resource and relevant objs del

app/admin.py

@@ -9,25 +9,26 @@ from django.http import HttpResponse
 import csv
 from django import forms
 from django.contrib.admin.widgets import AutocompleteSelect
+
+
 class autocomplete_fields_form(forms.ModelForm):
     """This form overrides autocomplete 
     organization field for Person class
     """
+
     def __init__(self, *args, **kwargs):
         super(autocomplete_fields_form, self).__init__(*args, **kwargs)
 
         # self.fields['organization'].label = 'My new label'
 
-
     class Meta:
         model = Person
         fields = '__all__'
-        widgets={
+        widgets = {
             'organization': forms.Select(attrs={'style': 'width:750px'})
         }
 
 
-
 def download_csv(modeladmin, request, queryset):
     name = queryset[0].__class__.__name__
     response = HttpResponse()
@@ -44,8 +45,10 @@ def download_csv(modeladmin, request, queryset):
         writer.writerow(temp_list)
     return response
 
+
 download_csv.short_description = 'export (.csv)'
 
+
 class PeopleResourceInline(admin.TabularInline):
     autocomplete_fields = ['resource']
     model = PeopleResource
@@ -64,12 +67,13 @@ class PersonAdmin(admin.ModelAdmin):
         PeopleRangeInline
     ]
     readonly_fields = ['id']
-    search_fields = ['title', 'first_name', 'last_name', 'organisation', 'position', 'country__short_name', 'contact_email']
+    search_fields = ['title', 'first_name', 'last_name', 'organisation',
+                     'position', 'country__short_name', 'contact_email']
     fieldsets = (
         (None, {
             'fields': (
                 ('id', 'profile_on_web', 'news_letter'),
-                ('mr_mrs', 'title','full_name', 'position'),
+                ('mr_mrs', 'title', 'full_name', 'position'),
                 ('first_name', 'last_name', 'search_name', 'status'),
                 ('contact_email', 'email_2', 'skype', 'professional_phone'),
                 'organization',
@@ -116,8 +120,11 @@ class PersonAdmin(admin.ModelAdmin):
     def get_field_queryset(self, db, db_field, request):
         queryset = super().get_field_queryset(db, db_field, request)
         if db_field.name == 'organization':
-            queryset = queryset.order_by('country','organisation_english','organisation_2','organisation_3', 'acronym')
+            queryset = queryset.order_by(
+                'country', 'organisation_english', 'organisation_2', 'organisation_3', 'acronym')
         return queryset
+
+
 class ResourceKeywordInline(admin.TabularInline):
     autocomplete_fields = ['keyword']
     model = ResourceKeyword
@@ -139,10 +146,6 @@ class ResourcePeopleInline(admin.TabularInline):
     }
 
 
-
-
-
-
 class ResourceAdmin(admin.ModelAdmin):
     inlines = [
         ResourceKeywordInline,
@@ -182,8 +185,32 @@ class ResourceAdmin(admin.ModelAdmin):
         }),
     )
     list_per_page = settings.ADMIN_LIST_PER_PAGE
-    actions = [download_csv]
 
+    def get_actions(self, request):
+        actions = super().get_actions(request)
+        if 'delete_selected' in actions:
+            del actions['delete_selected']
+        return actions
+
+    def delete_resource(self, request, obj):
+        for o in obj.all():
+            resource_keyword = ResourceKeyword.objects.filter(resource=o.id)
+            for i in resource_keyword:
+                i.delete()
+            resource_range = ResourceRange.objects.filter(resource_title=o.id)
+            for i in resource_range:
+                i.delete()
+            resource_people = ResourcesPeople.objects.filter(resource=o.id)
+            for i in resource_people:
+                i.delete()
+            resource_people_resource = PeopleResource.objects.filter(
+                resource=o.id)
+            for i in resource_people_resource:
+                i.delete()
+            o.delete()
+    delete_resource.short_description = 'Delete Resource & Related Fields'
+
+    actions = [download_csv, delete_resource]
 
 
 class RangeNameTranslationInline(admin.TabularInline):
@@ -241,6 +268,7 @@ class RangeAdmin(admin.ModelAdmin):
 
     actions = [download_csv]
 
+
 class PeopleOrganizationInline(admin.TabularInline):
     model = Person
     exclude = ['source_id', 'organisation', 'field_indexer']
@@ -252,15 +280,17 @@ class OrganizationAdmin(admin.ModelAdmin):
         PeopleOrganizationInline,
     ]
     readonly_fields = ('org_num1',)
-    search_fields = ['organisation_search', 'org_alpha_search', 'organisation_2', 'organisation_3', 'subject','organisation_english']
-    list_display = ['org_num1', 'organisation_english', 'organisation_2', 'country']
+    search_fields = ['organisation_search', 'org_alpha_search',
+                     'organisation_2', 'organisation_3', 'subject', 'organisation_english']
+    list_display = ['org_num1', 'organisation_english',
+                    'organisation_2', 'country']
     fieldsets = (
         (None, {
             'fields': (
                 'org_num1',
                 ('acronym', 'category', 'subject'),
                 'country',
-                ('organisation_english','tel', 'email', 'url',),
+                ('organisation_english', 'tel', 'email', 'url',),
                 ('organisation_2', 'organisation_3'),
                 'organisation_original',
             )
@@ -373,7 +403,8 @@ class SpeciesAdmin(admin.ModelAdmin):
 
 class TaxonRangeAdmin(admin.ModelAdmin):
     model = TaxonRange
-    search_fields = ['range__range_name', 'taxon', 'subrange_or_region', 'distribution', 'source', 'remarks']
+    search_fields = ['range__range_name', 'taxon',
+                     'subrange_or_region', 'distribution', 'source', 'remarks']
     list_display = ['range_name', 'taxon']
 
     def range_name(self, obj):
@@ -447,6 +478,7 @@ admin.site.register(Keyword, KeywordAdmin)
 # admin.site.register(Scale)
 # admin.site.register(Taxon)
 # admin.site.register(Field, FieldAdmin)
+admin.site.disable_action('delete_selected')
 
 
 # LU models