new action save as csv in admin

README.md

@@ -6,7 +6,7 @@ purpose: gather data from intern(WMDE) and extern(volunteers) forms to create a
 
     ln -sr foerderbarometer/settings_development.py foerderbarometer/settings.py
 
-build database with
+build the database with
 
   python3 manage.py migrate
 
@@ -18,12 +18,25 @@ run the development server with
 
   python3 manage.py runserver
 
+you can run some very basic tests with
+
+  python3 manage.py test
+
 access via
 
   http://localhost/
   http://localhost/intern/    (login required)
   http://localhost/admin/     (login reqiured)
 
+## additional admin functionality
+
+The admin page is the standard admin page delivered by django but with two additional functionalities:
+
+- There is a new action "export to csv" with which you can export all Selected
+entries to a csv file
+
+- There is a new button in the bottom of every Project to "save as new"
+
 ## versions used in development
 
     python 3.8.2

input/admin.py

@@ -1,12 +1,38 @@
+import csv
+
 from django.contrib import admin
+from django.http import HttpResponse
 
 from .models import Project, HonoraryCertificate, Library, IFG, Travel,\
                     Email, BusinessCard, List
 
+
+def export_as_csv(self, request, queryset):
+
+    meta = self.model._meta
+    field_names = [field.name for field in meta.fields]
+
+    response = HttpResponse(content_type='text/csv')
+    response['Content-Disposition'] = 'attachment; filename={}.csv'.format(meta)
+    writer = csv.writer(response)
+
+    writer.writerow(field_names)
+    for obj in queryset:
+        row = writer.writerow([getattr(obj, field) for field in field_names])
+
+    return response
+
+export_as_csv.short_description = "Export Selected"
+
+admin.site.add_action(export_as_csv)
+
 @admin.register(Project)
 class ProjectAdmin(admin.ModelAdmin):
     save_as = True
     readonly_fields = ('pid',)
+    #    action = ['export_as_csv']
+
+
 
 admin.site.register([
                      HonoraryCertificate,