Django admin forms: do not mess up my specially crafted fields please

* no stripping
* no introduction of '\r'

issues/admin.py

@@ -1,6 +1,7 @@
 from django.contrib import admin
 
 from .models import Issue, Grouping, TurningPoint
+from .forms import IssueAdminForm
 
 
 class GroupingInline(admin.TabularInline):
@@ -34,6 +35,8 @@ class TurningPointInline(admin.TabularInline):
 
 @admin.register(Issue)
 class IssueAdmin(admin.ModelAdmin):
+    form = IssueAdminForm
+
     fields = [
         'project',
         'friendly_id',

issues/forms.py

@@ -9,3 +9,21 @@ class CommentForm(ModelForm):
     class Meta:
         model = TurningPoint
         fields = ['comment']
+
+
+class IssueAdminForm(ModelForm):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        for fieldname in self.fields:
+            self.fields[fieldname].strip = False
+
+    def clean_fixed_at(self):
+        fixed_at = self.cleaned_data.get('fixed_at')
+        fixed_at = fixed_at.replace("\r", "")
+        return fixed_at
+
+    def clean_events_at(self):
+        events_at = self.cleaned_data.get('events_at')
+        events_at = events_at.replace("\r", "")
+        return events_at