Fix #1122 filter options translations.

The lazy_gettext was evaluated too soon, before the translator
is ready.

flask_admin/model/base.py

@@ -23,7 +23,7 @@ from flask_admin.helpers import (get_form_data, validate_form_on_submit,
 from flask_admin.tools import rec_getattr
 from flask_admin._backwards import ObsoleteAttr
 from flask_admin._compat import (iteritems, itervalues, OrderedDict,
-                                 as_unicode, csv_encode)
+                                 as_unicode, csv_encode, text_type)
 from .helpers import prettify_name, get_mdict_item_or_list
 from .ajax import AjaxModelLoader
 from .fields import ListEditableFieldList
@@ -78,6 +78,10 @@ class FilterGroup(object):
         for item in self.filters:
             copy = dict(item)
             copy['operation'] = as_unicode(copy['operation'])
+            options = copy['options']
+            if options:
+                copy['options'] = [(k, text_type(v)) for k, v in options]
+
             filters.append(copy)
         return as_unicode(self.label), filters
 
@@ -735,7 +739,6 @@ class BaseModelView(BaseView, ActionsMixin):
                 key = as_unicode(flt.name)
                 if key not in self._filter_groups:
                     self._filter_groups[key] = FilterGroup(flt.name)
-
                 self._filter_groups[key].append({
                     'index': i,
                     'arg': self.get_filter_arg(i, flt),

flask_admin/model/filters.py

 import time
 import datetime
 
-from flask_admin._compat import text_type
 from flask_admin.babel import lazy_gettext
 
 
@@ -39,7 +38,7 @@ class BaseFilter(object):
             if callable(options):
                 options = options()
 
-            return [(v, text_type(n)) for v, n in options]
+            return options
 
         return None
 

flask_admin/tests/test_model.py

@@ -326,14 +326,14 @@ def test_column_filters():
 def test_filter_list_callable():
     app, admin = setup()
 
-    flt = SimpleFilter('test', options=lambda: (('1', 'Test 1'), ('2', 'Test 2')))
+    flt = SimpleFilter('test', options=lambda: [('1', 'Test 1'), ('2', 'Test 2')])
 
     view = MockModelView(Model, column_filters=[flt])
     admin.add_view(view)
 
     opts = flt.get_options(view)
     eq_(len(opts), 2)
-    eq_(opts, [('1', u'Test 1'), ('2', u'Test 2')])
+    eq_(opts, [('1', 'Test 1'), ('2', 'Test 2')])
 
 
 def test_form():