Fixed #22684 -- Amended SelectDateWidget.empty_label to accept a tuple of values.

Thanks danielsamuels for the report

django/forms/extras/widgets.py

@@ -64,8 +64,21 @@ class SelectDateWidget(Widget):
         else:
             self.months = MONTHS
 
-        if empty_label is not None:
-            self.none_value = (0, empty_label)
+        # Optional string, list, or tuple to use as empty_label.
+        if isinstance(empty_label, (list, tuple)):
+            if not len(empty_label) == 3:
+                raise ValueError('empty_label list/tuple must have 3 elements.')
+
+            self.year_none_value = (0, empty_label[0])
+            self.month_none_value = (0, empty_label[1])
+            self.day_none_value = (0, empty_label[2])
+        else:
+            if empty_label is not None:
+                self.none_value = (0, empty_label)
+
+            self.year_none_value = self.none_value
+            self.month_none_value = self.none_value
+            self.day_none_value = self.none_value
 
     def render(self, name, value, attrs=None):
         try:
@@ -86,11 +99,11 @@ class SelectDateWidget(Widget):
                         year_val, month_val, day_val = [int(v) for v in match.groups()]
         html = {}
         choices = [(i, i) for i in self.years]
-        html['year'] = self.create_select(name, self.year_field, value, year_val, choices)
+        html['year'] = self.create_select(name, self.year_field, value, year_val, choices, self.year_none_value)
         choices = list(six.iteritems(self.months))
-        html['month'] = self.create_select(name, self.month_field, value, month_val, choices)
+        html['month'] = self.create_select(name, self.month_field, value, month_val, choices, self.month_none_value)
         choices = [(i, i) for i in range(1, 32)]
-        html['day'] = self.create_select(name, self.day_field, value, day_val, choices)
+        html['day'] = self.create_select(name, self.day_field, value, day_val, choices, self.day_none_value)
 
         output = []
         for field in _parse_date_fmt():
@@ -123,13 +136,13 @@ class SelectDateWidget(Widget):
                 return '%s-%s-%s' % (y, m, d)
         return data.get(name, None)
 
-    def create_select(self, name, field, value, val, choices):
+    def create_select(self, name, field, value, val, choices, none_value):
         if 'id' in self.attrs:
             id_ = self.attrs['id']
         else:
             id_ = 'id_%s' % name
         if not self.is_required:
-            choices.insert(0, self.none_value)
+            choices.insert(0, none_value)
         local_attrs = self.build_attrs(id=field % id_)
         s = Select(choices=choices)
         select_html = s.render(field % name, val, local_attrs)

docs/ref/forms/widgets.txt

@@ -787,9 +787,20 @@ Composite widgets
         .. versionadded:: 1.8
 
         If the :class:`~django.forms.DateField` is not required,
-        :class:`SelectDateWidget` will have an empty choice at the top of
-        the list. You can change the text of this label
-        (which is ``---`` by default) with the ``empty_label`` attribute::
+        :class:`SelectDateWidget` will have an empty choice at the top of the
+        list (which is ``---`` by default). You can change the text of this
+        label with the ``empty_label`` attribute. ``empty_label`` can be a
+        ``string``, ``list``, or ``tuple``. When a string is used, all select
+        boxes will each have an empty choice with this label. If ``empty_label``
+        is a ``list`` or ``tuple`` of 3 string elements, the select boxes will
+        have their own custom label. The labels should be in this order
+        ``('year_label', 'month_label', 'day_label')``.
 
-            # A custom empty label
+        .. code-block:: python
+
+            # A custom empty label with string
             field1 = forms.DateField(widget=SelectDateWidget(empty_label="Nothing"))
+
+            # A custom empty label with tuple
+            field1 = forms.DateField(widget=SelectDateWidget(
+                empty_label=("Choose Year", "Choose Month", "Choose Day"))

tests/forms_tests/tests/test_extra.py

@@ -297,11 +297,6 @@ class FormsExtraTestCase(TestCase, AssertFormErrorsMixin):
 <option value="2013">2013</option>
 </select>""")
 
-        w = SelectDateWidget(years=('2014',), empty_label='empty_label')
-
-        # Rendering the default state with empty_label setted.
-        self.assertInHTML('<option value="0">empty_label</option>', w.render('mydate', ''), count=3)
-
         a = GetDate({'mydate_month': '4', 'mydate_day': '1', 'mydate_year': '2008'})
         self.assertTrue(a.is_valid())
         self.assertEqual(a.cleaned_data['mydate'], datetime.date(2008, 4, 1))
@@ -325,6 +320,72 @@ class FormsExtraTestCase(TestCase, AssertFormErrorsMixin):
         d = GetDate({'mydate_month': '1', 'mydate_day': '1', 'mydate_year': '2010'})
         self.assertTrue('<label for="id_mydate_month">' in d.as_p())
 
+    def test_selectdate_empty_label(self):
+        w = SelectDateWidget(years=('2014',), empty_label='empty_label')
+
+        # Rendering the default state with empty_label setted as string.
+        self.assertInHTML('<option value="0">empty_label</option>', w.render('mydate', ''), count=3)
+
+        w = SelectDateWidget(years=('2014',), empty_label=('empty_year', 'empty_month', 'empty_day'))
+
+        # Rendering the default state with empty_label tuple.
+        self.assertHTMLEqual(w.render('mydate', ''), """<select name="mydate_month" id="id_mydate_month">
+<option value="0">empty_month</option>
+<option value="1">January</option>
+<option value="2">February</option>
+<option value="3">March</option>
+<option value="4">April</option>
+<option value="5">May</option>
+<option value="6">June</option>
+<option value="7">July</option>
+<option value="8">August</option>
+<option value="9">September</option>
+<option value="10">October</option>
+<option value="11">November</option>
+<option value="12">December</option>
+</select>
+<select name="mydate_day" id="id_mydate_day">
+<option value="0">empty_day</option>
+<option value="1">1</option>
+<option value="2">2</option>
+<option value="3">3</option>
+<option value="4">4</option>
+<option value="5">5</option>
+<option value="6">6</option>
+<option value="7">7</option>
+<option value="8">8</option>
+<option value="9">9</option>
+<option value="10">10</option>
+<option value="11">11</option>
+<option value="12">12</option>
+<option value="13">13</option>
+<option value="14">14</option>
+<option value="15">15</option>
+<option value="16">16</option>
+<option value="17">17</option>
+<option value="18">18</option>
+<option value="19">19</option>
+<option value="20">20</option>
+<option value="21">21</option>
+<option value="22">22</option>
+<option value="23">23</option>
+<option value="24">24</option>
+<option value="25">25</option>
+<option value="26">26</option>
+<option value="27">27</option>
+<option value="28">28</option>
+<option value="29">29</option>
+<option value="30">30</option>
+<option value="31">31</option>
+</select>
+<select name="mydate_year" id="id_mydate_year">
+<option value="0">empty_year</option>
+<option value="2014">2014</option>
+</select>""")
+
+        self.assertRaisesMessage(ValueError, 'empty_label list/tuple must have 3 elements.',
+            SelectDateWidget, years=('2014',), empty_label=('not enough', 'values'))
+
     def test_multiwidget(self):
         # MultiWidget and MultiValueField #############################################
         # MultiWidgets are widgets composed of other widgets. They are usually