fix: add value choice/enum support for grid filters

also add `set_enum()` method for grids, which updates column renderer
as well as filter choices

tests/grids/test_base.py

@@ -2,6 +2,8 @@
 
 import datetime
 import decimal
+from collections import OrderedDict
+from enum import Enum
 from unittest import TestCase
 from unittest.mock import patch, MagicMock
 
@@ -261,6 +263,36 @@ class TestGrid(WebTestCase):
         self.assertIn('created', grid.renderers)
         self.assertIsNot(grid.renderers['created'], myrender)
 
+    def test_set_enum(self):
+        model = self.app.model
+
+        class MockEnum(Enum):
+            FOO = 'foo'
+            BAR = 'bar'
+
+        # no enums by default
+        grid = self.make_grid(columns=['foo', 'bar'])
+        self.assertEqual(grid.enums, {})
+
+        # enum is set, but not filter choices
+        grid = self.make_grid(columns=['foo', 'bar'],
+                              filterable=False,
+                              enums={'foo': MockEnum})
+        self.assertIs(grid.enums['foo'], MockEnum)
+        self.assertEqual(grid.filters, {})
+
+        # both enum and filter choices are set
+        grid = self.make_grid(model_class=model.Setting,
+                              filterable=True,
+                              enums={'name': MockEnum})
+        self.assertIs(grid.enums['name'], MockEnum)
+        self.assertIn('name', grid.filters)
+        self.assertIn('value', grid.filters)
+        self.assertEqual(grid.filters['name'].choices, OrderedDict([
+            ('FOO', 'foo'),
+            ('BAR', 'bar'),
+        ]))
+
     def test_linked_columns(self):
         grid = self.make_grid(columns=['foo', 'bar'])
         self.assertEqual(grid.linked_columns, [])
@@ -1432,6 +1464,20 @@ class TestGrid(WebTestCase):
         value = decimal.Decimal('-42.42')
         self.assertEqual(grid.render_currency(obj, 'foo', value), '($42.42)')
 
+    def test_render_enum(self):
+        enum = self.app.enum
+        grid = self.make_grid(columns=['foo', 'bar'])
+        obj = {'status': None}
+
+        # null
+        value = grid.render_enum(obj, 'status', None, enum=enum.UpgradeStatus)
+        self.assertIsNone(value)
+
+        # normal
+        obj['status'] = enum.UpgradeStatus.SUCCESS
+        value = grid.render_enum(obj, 'status', 'SUCCESS', enum=enum.UpgradeStatus)
+        self.assertEqual(value, 'success')
+
     def test_render_percent(self):
         grid = self.make_grid(columns=['foo', 'bar'])
         obj = MagicMock()
@@ -1572,6 +1618,27 @@ class TestGrid(WebTestCase):
         grid.load_settings()
         filters = grid.get_vue_filters()
         self.assertEqual(len(filters), 2)
+        name, value = filters
+        self.assertEqual(name['choices'], [])
+        self.assertEqual(name['choice_labels'], {})
+        self.assertEqual(value['choices'], [])
+        self.assertEqual(value['choice_labels'], {})
+
+        class MockEnum(Enum):
+            FOO = 'foo'
+            BAR = 'bar'
+
+        # with filter choices
+        grid = self.make_grid(key='settings', model_class=model.Setting,
+                              filterable=True, enums={'name': MockEnum})
+        grid.load_settings()
+        filters = grid.get_vue_filters()
+        self.assertEqual(len(filters), 2)
+        name, value = filters
+        self.assertEqual(name['choices'], ['FOO', 'BAR'])
+        self.assertEqual(name['choice_labels'], {'FOO': 'foo', 'BAR': 'bar'})
+        self.assertEqual(value['choices'], [])
+        self.assertEqual(value['choice_labels'], {})
 
     def test_object_to_dict(self):
         grid = self.make_grid()