creating support for BoundWidget based of jazzband#122 with tests

Author: girishkumarkh

.vscode/settings.json

@@ -0,0 +1,11 @@
+{
+    "python.testing.unittestArgs": [
+        "-v",
+        "-s",
+        "./tests",
+        "-p",
+        "*test*.py"
+    ],
+    "python.testing.pytestEnabled": false,
+    "python.testing.unittestEnabled": true
+}

README.rst

@@ -268,6 +268,22 @@ Output:
         <input id="id_name" type="text" name="name" maxlength="100" />
     </div>
 
+Fields with multiple widgets
+============================
+
+Some fields may render as a `MultiWidget`, composed of multiple subwidgets
+(for example, a `ChoiceField` using `RadioSelect`). You can use the same tags
+and filters, but your template code will need to include a for loop for fields
+like this:
+
+.. code-block:: html+django
+
+    {% load widget_tweaks %}
+
+    {% for widget in form.choice %}
+        {{ widget|add_class:"css_class_1 css_class_2" }}
+    {% endfor %}
+
 Mixing render_field and filters
 ===============================
 
@@ -419,8 +435,3 @@ Make sure you have `tox <http://tox.testrun.org/>`_ installed, then type
     tox
 
 from the source checkout.
-
-NOT SUPPORTED
-=============
-
-MultiWidgets: SplitDateTimeWidget, SplitHiddenDateTimeWidget

tests/forms.py

@@ -15,6 +15,7 @@ class MyForm(Form):
     with_attrs = CharField(widget=TextInput(attrs={"foo": "baz", "egg": "spam"}))
     with_cls = CharField(widget=TextInput(attrs={"class": "class0"}))
     date = forms.DateField(widget=SelectDateWidget(attrs={"egg": "spam"}))
+    choice = forms.ChoiceField(choices=[(1, "one"), (2, "two")])
 
 
 def render_form(text, form=None, **context_args):

tests/tests.py

@@ -389,3 +389,14 @@ def test_field_arroba_dot(self):
     def test_field_double_colon_missing(self):
         res = render_form('{{ form.simple|attr:"::class:{active:True}" }}')
         assertIn(':class="{active:True}"', res)
+
+
+class ChoiceFieldTest(TestCase):
+    def test_choice(self):
+        res = render_field("choice", "attr", "foo:bar")
+        assertIn("select", res)
+        assertIn('name="choice"', res)
+        assertIn('id="id_choice"', res)
+        assertIn('foo="bar"', res)
+        assertIn('<option value="1">one</option>', res)
+        assertIn('<option value="2">two</option>', res)

widget_tweaks/templatetags/widget_tweaks.py

@@ -24,6 +24,20 @@ def _process_field_attributes(field, attr, process):
     attribute = params[0].replace("::", ":")
     value = params[1] if len(params) == 2 else True
     field = copy(field)
+
+    if not hasattr(field, "as_widget"):
+        old_tag = field.tag
+
+        def tag(self):  # pylint: disable=unused-argument
+            attrs = self.data["attrs"]
+            process(self.parent_widget, attrs, attribute, value)
+            html = old_tag()
+            self.tag = old_tag
+            return html
+
+        field.tag = types.MethodType(tag, field)
+        return field
+
     # decorate field.as_widget method with updated attributes
     old_as_widget = field.as_widget