fix: add WuttaDateWidget and associated logic

src/wuttaweb/forms/base.py

@@ -546,10 +546,13 @@ class Form:
         This is generally only possible if :attr:`model_class` is set
         to a valid SQLAlchemy mapped class.
 
-        As of writing this only looks for
-        :class:`sqlalchemy:sqlalchemy.types.DateTime` fields and if
-        any are found, they are configured to use
-        :class:`~wuttaweb.forms.widgets.WuttaDateTimeWidget()`.
+        This only checks for a couple of data types, with mapping as
+        follows:
+
+        * :class:`sqlalchemy:sqlalchemy.types.Date` ->
+          :class:`~wuttaweb.forms.widgets.WuttaDateWidget`
+        * :class:`sqlalchemy:sqlalchemy.types.DateTime` ->
+          :class:`~wuttaweb.forms.widgets.WuttaDateTimeWidget`
         """
         from wuttaweb.forms import widgets
 
@@ -565,8 +568,9 @@ class Form:
                 prop = getattr(attr, 'prop', None)
                 if prop and isinstance(prop, orm.ColumnProperty):
                     column = prop.columns[0]
-                    if isinstance(column.type, sa.DateTime):
-                        # self.set_renderer(key, self.render_datetime)
+                    if isinstance(column.type, sa.Date):
+                        self.set_widget(key, widgets.WuttaDateWidget(self.request))
+                    elif isinstance(column.type, sa.DateTime):
                         self.set_widget(key, widgets.WuttaDateTimeWidget(self.request))
 
     def set_grid(self, key, grid):

src/wuttaweb/forms/widgets.py

@@ -36,6 +36,7 @@ in the namespace:
 * :class:`deform:deform.widget.CheckboxWidget`
 * :class:`deform:deform.widget.SelectWidget`
 * :class:`deform:deform.widget.CheckboxChoiceWidget`
+* :class:`deform:deform.widget.DateInputWidget`
 * :class:`deform:deform.widget.DateTimeInputWidget`
 * :class:`deform:deform.widget.MoneyInputWidget`
 """
@@ -49,7 +50,7 @@ import humanize
 from deform.widget import (Widget, TextInputWidget, TextAreaWidget,
                            PasswordWidget, CheckedPasswordWidget,
                            CheckboxWidget, SelectWidget, CheckboxChoiceWidget,
-                           DateTimeInputWidget, MoneyInputWidget)
+                           DateInputWidget, DateTimeInputWidget, MoneyInputWidget)
 from webhelpers2.html import HTML
 
 from wuttjamaican.conf import parse_list
@@ -153,6 +154,43 @@ class WuttaCheckboxChoiceWidget(CheckboxChoiceWidget):
         self.app = self.config.get_app()
 
 
+class WuttaDateWidget(DateInputWidget):
+    """
+    Custom widget for :class:`python:datetime.date` fields.
+
+    The main purpose of this widget is to leverage
+    :meth:`~wuttjamaican:wuttjamaican.app.AppHandler.render_date()`
+    for the readonly display.
+
+    It is automatically used for SQLAlchemy mapped classes where the
+    field maps to a :class:`sqlalchemy:sqlalchemy.types.Date` column.
+    For other (non-mapped) date fields, or mapped datetime fields for
+    which a date widget is preferred, use
+    :meth:`~wuttaweb.forms.base.Form.set_widget()`.
+
+    This is a subclass of
+    :class:`deform:deform.widget.DateInputWidget` and uses these
+    Deform templates:
+
+    * ``dateinput``
+    """
+
+    def __init__(self, request, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.request = request
+        self.config = self.request.wutta_config
+        self.app = self.config.get_app()
+
+    def serialize(self, field, cstruct, **kw):
+        """ """
+        readonly = kw.get('readonly', self.readonly)
+        if readonly and cstruct:
+            dt = datetime.datetime.fromisoformat(cstruct)
+            return self.app.render_date(dt)
+
+        return super().serialize(field, cstruct, **kw)
+
+
 class WuttaDateTimeWidget(DateTimeInputWidget):
     """
     Custom widget for :class:`python:datetime.datetime` fields.