Prevent creation of PotFel for Profile if one already exists

colleges/forms.py

@@ -225,6 +225,15 @@ class PotentialFellowshipForm(RequestFormMixin, forms.ModelForm):
         model = PotentialFellowship
         fields = ['college', 'profile']
 
+    def clean_profile(self):
+        """Check that no preexisting PotentialFellowship exists."""
+        cleaned_profile = self.cleaned_data['profile']
+        if cleaned_profile.potentialfellowship_set.all():
+            self.add_error(
+                'profile',
+                'This profile already has a PotentialFellowship. Update that instead.')
+        return cleaned_profile
+
     def save(self):
         """
         The default status is IDENTIFIED, which is appropriate

colleges/templates/colleges/potentialfellowship_list.html

@@ -116,7 +116,7 @@
 
   <div class="row">
     <div class="col-12">
-      {% if view.kwargs.acad_field or request.GET.status %}
+      {% if view.kwargs.acad_field or request.GET.status or request.GET.text %}
 	<h3>Potential Fellowships
 	  {% if view.kwargs.acad_field %}in {{ view.kwargs.acad_field }}
 	    {% if view.kwargs.specialty %}, {{ view.kwargs.specialty }}{% endif %}