Added sent flag to newsletter to determine if newsletter has been sent out to subscribers yet

newsletters/admin.py

@@ -14,11 +14,11 @@ class NewsletterAdmin(admin.ModelAdmin):
 
     def get_form(self, request, obj=None, **kwargs):
         if obj:
-            self.fields = ['creator', 'subject', 'body', 'publish']
-            if obj.publish < timezone.now():
-                self.readonly_fields = ['creator', 'subject', 'body', 'publish']
+            self.fields = ['creator', 'subject', 'body', 'sent', 'publish']
+            if obj.sent:
+                self.readonly_fields = ['creator', 'subject', 'body', 'sent', 'publish']
             else:
-                self.readonly_fields = ['creator']
+                self.readonly_fields = ['creator', 'sent']
         else:
             self.fields = ['subject', 'body', 'publish']
             self.readonly_fields = []

newsletters/models.py

@@ -8,6 +8,7 @@ class Newsletter(models.Model):
     created = models.DateTimeField(auto_now_add=True)
     creator = models.ForeignKey(User)
     publish = models.DateTimeField(default=now())
+    sent = models.BooleanField(default=False)
     subject = models.CharField(max_length=255)
 
     def __str__(self):

newsletters/views.py

@@ -4,5 +4,5 @@ from .models import Newsletter
 
 
 def newsletters(request):
-    newsletters = Newsletter.objects.all().order_by('-publish')
+    newsletters = Newsletter.objects.filter(sent=True).order_by('-publish')
     return render(request, 'newsletters.html', {'newsletters': newsletters})