make it possible to edit all custom metadata

nonstop/forms.py

@@ -15,7 +15,7 @@ class UploadTracksForm(forms.Form):
     nonstop_zone = forms.ChoiceField(choices=get_optional_nonstop_zones)
 
 
-class NonstopZonesForm(forms.ModelForm):
+class TrackMetaForm(forms.ModelForm):
     class Meta:
         model = Track
-        fields = ['nonstop_zones']
+        fields = ['language', 'instru', 'sabam', 'cfwb', 'nonstop_zones']

nonstop/models.py

@@ -75,6 +75,8 @@ class Track(models.Model):
         return os.path.exists(self.nonstopfile_set.order_by('creation_timestamp').last().get_local_filepath())
 
     def sync_nonstop_zones(self):
+        if not self.file_exists():
+            return
         nonstop_file = self.nonstopfile_set.order_by('creation_timestamp').last()
         filename = nonstop_file.filename
         current_zones = self.nonstop_zones.all()

nonstop/templates/nonstop/track_detail.html

@@ -26,7 +26,7 @@
 {% if object.file_exists %}
 <form method="POST">
   {% csrf_token %}
-  {{ zones_form.as_p }}
+  {{ metadata_form.as_p }}
   <div class="buttons">
     <button class="submit-button">{% trans "Update" %}</button>
   </div>

nonstop/views.py

@@ -18,7 +18,7 @@ from django.views.generic.detail import DetailView
 from django.views.generic.edit import FormView
 from django.views.generic.list import ListView
 
-from .forms import UploadTracksForm, NonstopZonesForm
+from .forms import UploadTracksForm, TrackMetaForm
 from .models import SomaLogLine, Track, Artist, NonstopFile
 from emissions.models import Nonstop
 
@@ -63,14 +63,14 @@ class TrackDetailView(DetailView):
 
     def get_context_data(self, **kwargs):
         ctx = super(TrackDetailView, self).get_context_data(**kwargs)
-        ctx['zones_form'] = NonstopZonesForm(instance=self.object)
+        ctx['metadata_form'] = TrackMetaForm(instance=self.object)
         return ctx
 
     def post(self, request, *args, **kwargs):
         instance = self.get_object()
         old_nonstop_zones = copy.copy(instance.nonstop_zones.all())
-        zones_form = NonstopZonesForm(request.POST, instance=instance)
-        zones_form.save()
+        form = TrackMetaForm(request.POST, instance=instance)
+        form.save()
         new_nonstop_zones = self.get_object().nonstop_zones.all()
         if set(old_nonstop_zones) != set(new_nonstop_zones):
             instance.sync_nonstop_zones()