add help text to gcal_id and prevent manual editing in admin form

Author: pinwheeeel

core/forms.py

@@ -218,6 +218,7 @@ def __init__(self, *args, **kwargs):
         self.fields["schedule_format"].initial = "default"
         self.fields["term"].initial = models.Term.get_current()
         self.fields["is_instructional"].disabled = True
+        self.fields["gcal_id"].disabled = True
 
         if "instance" in kwargs and kwargs["instance"] is not None:
             instance = kwargs["instance"]

core/models/course.py

@@ -255,6 +255,7 @@ class Event(models.Model):
         default=None,
         null=True,
         unique=True,
+        help_text="Unique identifier for events that are automatically created using data from the official WLMAC calendar. Should not be manually edited.",
     )
 
     def __str__(self):