core: create TzAwareDateTimeField to replace forms.DateTimeField

club/forms.py

@@ -34,6 +34,7 @@ from club.models import Mailing, MailingSubscription, Club, Membership
 from core.models import User
 from core.views.forms import SelectDate, SelectDateTime
 from counter.models import Counter
+from core.views.forms import TzAwareDateTimeField
 
 
 class ClubEditForm(forms.ModelForm):
@@ -158,18 +159,9 @@ class MailingForm(forms.Form):
 
 
 class SellingsForm(forms.Form):
-    begin_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("Begin date"),
-        required=False,
-        widget=SelectDateTime,
-    )
-    end_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("End date"),
-        required=False,
-        widget=SelectDateTime,
-    )
+    begin_date = TzAwareDateTimeField(label=_("Begin date"), required=False)
+    end_date = TzAwareDateTimeField(label=_("End date"), required=False)
+
     counters = forms.ModelMultipleChoiceField(
         Counter.objects.order_by("name").all(), label=_("Counter"), required=False
     )

com/templates/com/poster_list.jinja

@@ -36,8 +36,8 @@
                     <div class="name">{{ poster.name }}</div>
                     <div class="image"><img src="{{ poster.file.url }}"></img></div>
                     <div class="dates">
-                        <div class="begin">{{ poster.date_begin | date("d/M/Y H:m") }}</div>
-                        <div class="end">{{ poster.date_end | date("d/M/Y H:m") }}</div>
+                        <div class="begin">{{ poster.date_begin | localtime | date("d/M/Y H:m") }}</div>
+                        <div class="end">{{ poster.date_end | localtime | date("d/M/Y H:m") }}</div>
                     </div>
                     {% if app == "com" %}
                         <a class="edit" href="{{ url(app + ":poster_edit", poster.id) }}">{% trans %}Edit{% endtrans %}</a>

com/views.py

@@ -52,6 +52,7 @@ from core.views import (
 from core.views.forms import SelectDateTime, MarkdownInput
 from core.models import Notification, RealGroup, User
 from club.models import Club, Mailing
+from core.views.forms import TzAwareDateTimeField
 
 
 # Sith object
@@ -73,19 +74,12 @@ class PosterForm(forms.ModelForm):
         ]
         widgets = {"screens": forms.CheckboxSelectMultiple}
 
-    date_begin = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
+    date_begin = TzAwareDateTimeField(
         label=_("Start date"),
-        widget=SelectDateTime,
         required=True,
         initial=timezone.now().strftime("%Y-%m-%d %H:%M:%S"),
     )
-    date_end = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("End date"),
-        widget=SelectDateTime,
-        required=False,
-    )
+    date_end = TzAwareDateTimeField(label=_("End date"), required=False)
 
     def __init__(self, *args, **kwargs):
         self.user = kwargs.pop("user", None)
@@ -199,24 +193,10 @@ class NewsForm(forms.ModelForm):
             "content": MarkdownInput,
         }
 
-    start_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("Start date"),
-        widget=SelectDateTime,
-        required=False,
-    )
-    end_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("End date"),
-        widget=SelectDateTime,
-        required=False,
-    )
-    until = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("Until"),
-        widget=SelectDateTime,
-        required=False,
-    )
+    start_date = TzAwareDateTimeField(label=_("Start date"), required=False)
+    end_date = TzAwareDateTimeField(label=_("End date"), required=False)
+    until = TzAwareDateTimeField(label=_("Until"), required=False)
+
     automoderation = forms.BooleanField(label=_("Automoderation"), required=False)
 
     def clean(self):

core/views/forms.py

@@ -42,6 +42,10 @@ from django.utils.translation import ugettext
 from phonenumber_field.widgets import PhoneNumberInternationalFallbackWidget
 from ajax_select.fields import AutoCompleteSelectField
 from ajax_select import make_ajax_field
+from django.utils.dateparse import parse_datetime
+from django.utils import timezone
+import datetime
+from django.forms.utils import to_current_timezone
 
 import re
 
@@ -392,3 +396,26 @@ class GiftForm(forms.ModelForm):
                 id=user_id
             )
             self.fields["user"].widget = forms.HiddenInput()
+
+
+class TzAwareDateTimeField(forms.DateTimeField):
+    def __init__(
+        self, input_formats=["%Y-%m-%d %H:%M:%S"], widget=SelectDateTime, **kwargs
+    ):
+        super().__init__(input_formats=input_formats, widget=widget, **kwargs)
+
+    def prepare_value(self, value):
+        # the db value is a datetime as a string in UTC
+        if isinstance(value, str):
+            # convert it into a naive datetime (no timezone attached)
+            value = parse_datetime(value)
+            # attach it to the UTC timezone (so that to_current_timezone()
+            # converts it to the local timezone)
+            value = timezone.make_aware(value, timezone.utc)
+
+        if isinstance(value, datetime.datetime):
+            value = to_current_timezone(value)
+            # otherwise it is formatted according to locale (in french)
+            value = str(value)
+
+        return value

counter/views.py

@@ -70,6 +70,7 @@ from counter.models import (
     Permanency,
 )
 from accounting.models import CurrencyField
+from core.views.forms import TzAwareDateTimeField
 
 
 class CounterAdminMixin(View):
@@ -1584,18 +1585,8 @@ class CashSummaryEditView(CounterAdminTabsMixin, CounterAdminMixin, UpdateView):
 
 
 class CashSummaryFormBase(forms.Form):
-    begin_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("Begin date"),
-        required=False,
-        widget=SelectDateTime,
-    )
-    end_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("End date"),
-        required=False,
-        widget=SelectDateTime,
-    )
+    begin_date = TzAwareDateTimeField(label=_("Begin date"), required=False)
+    end_date = TzAwareDateTimeField(label=_("End date"), required=False)
 
 
 class CashSummaryListView(CounterAdminTabsMixin, CounterAdminMixin, ListView):

election/views.py

@@ -14,6 +14,7 @@ from core.views import CanViewMixin, CanEditMixin, CanCreateMixin
 from django.db.models.query import QuerySet
 from core.views.forms import SelectDateTime, MarkdownInput
 from election.models import Election, Role, Candidature, ElectionList, Vote
+from core.views.forms import TzAwareDateTimeField
 
 from ajax_select.fields import AutoCompleteSelectField
 from ajax_select import make_ajax_field
@@ -167,30 +168,12 @@ class ElectionForm(forms.ModelForm):
         label=_("candidature groups"),
     )
 
-    start_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("Start date"),
-        widget=SelectDateTime,
-        required=True,
-    )
-    end_date = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("End date"),
-        widget=SelectDateTime,
-        required=True,
-    )
-    start_candidature = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("Start candidature"),
-        widget=SelectDateTime,
-        required=True,
-    )
-    end_candidature = forms.DateTimeField(
-        input_formats=["%Y-%m-%d %H:%M:%S"],
-        label=_("End candidature"),
-        widget=SelectDateTime,
-        required=True,
+    start_date = TzAwareDateTimeField(label=_("Start date"), required=True)
+    end_date = TzAwareDateTimeField(label=_("End date"), required=True)
+    start_candidature = TzAwareDateTimeField(
+        label=_("Start candidature"), required=True
     )
+    end_candidature = TzAwareDateTimeField(label=_("End candidature"), required=True)
 
 
 # Display elections

subscription/views.py

@@ -36,22 +36,17 @@ from subscription.models import Subscription
 from core.views.forms import SelectDateTime
 from core.models import User
 from core.views.forms import SelectDate
+from core.views.forms import TzAwareDateTimeField
 
 
 class SelectionDateForm(forms.Form):
     def __init__(self, *args, **kwargs):
         super(SelectionDateForm, self).__init__(*args, **kwargs)
-        self.fields["start_date"] = forms.DateTimeField(
-            input_formats=["%Y-%m-%d %H:%M:%S"],
-            label=_("Start date"),
-            widget=SelectDateTime,
-            required=True,
+        self.fields["start_date"] = TzAwareDateTimeField(
+            label=_("Start date"), required=True
         )
-        self.fields["end_date"] = forms.DateTimeField(
-            input_formats=["%Y-%m-%d %H:%M:%S"],
-            label=_("End date"),
-            widget=SelectDateTime,
-            required=True,
+        self.fields["end_date"] = TzAwareDateTimeField(
+            label=_("End date"), required=True
         )