refator(subscription): update functionality, list view, subscription design

manage_subscriptions/forms.py

@@ -11,6 +11,7 @@ class SubscriptionForm(forms.ModelForm):
         fields = [
             "title",
             "short_description",
+            "long_description",
             "interval",
             "interval_count",
             "high_amount",
@@ -20,6 +21,7 @@ class SubscriptionForm(forms.ModelForm):
             "active",
             "is_free",
         ]
+        exclude = []
 
     def __init__(self, *args, **kwargs):
         super(SubscriptionForm, self).__init__(*args, **kwargs)
@@ -29,6 +31,23 @@ class SubscriptionForm(forms.ModelForm):
             id__in=[event_user.id, event_manager.id]
         )
 
+        if self.instance:
+            # If there is an instance (i.e. we're editing an existing subscription)
+
+            # Use a dictionary comprehension to create a new dictionary of fields
+            # that excludes the readonly fields
+            self.fields = {
+                field_name: field
+                for field_name, field in self.fields.items()
+                if field_name not in [
+                    "interval",
+                    "interval_count",
+                    "amount",
+                    "high_amount",
+                    "principal_types",
+                ]
+            }
+
 
 class PrincipalSubscriptionForm(forms.ModelForm):
     class Meta: