fix translations_path

doc/changelog.rst

@@ -7,6 +7,7 @@ Changelog
 Fixes:
 
 * The `Apply` button for filters will show/hide correctly again
+* Fix `translations_path` attribute when Flask-Admin is used with Flask-Babel
 
 2.0.0a0
 -------

flask_admin/babel.py

@@ -26,15 +26,16 @@ class CustomDomain(Domain):
         def __init__(self):
             super(CustomDomain, self).__init__(translations.__path__[0], domain='admin')
 
-        def get_translations_path(self, ctx):
+        @property
+        def translation_directories(self):
             view = get_current_view()
 
             if view is not None:
                 dirname = view.admin.translations_path
                 if dirname is not None:
-                    return dirname
+                    return [dirname] + super().translation_directories
 
-            return super(CustomDomain, self).get_translations_path(ctx)
+            return super().translation_directories
 
     domain = CustomDomain()
 

flask_admin/tests/test_babel.py

@@ -0,0 +1,33 @@
+from unittest import mock
+
+import pytest
+
+from flask_admin import babel, translations
+
+from . import flask_babel_test_decorator
+
+
+@flask_babel_test_decorator
+@pytest.mark.parametrize("dirname", [None, "foo/bar"])
+@mock.patch("flask_admin.babel.get_current_view")
+@mock.patch("flask_babel.Domain.get_translations_cache")
+@mock.patch("flask_babel._get_current_context")
+@mock.patch("flask_babel.get_locale", return_value="qux")
+@mock.patch("babel.support.Translations")
+def test_translations_path(
+    _Translations,
+    _get_locale,
+    _get_current_context,
+    _get_translations_cache,
+    _get_current_view,
+    dirname,
+):
+    _get_current_view.return_value.admin.translations_path = dirname
+    _get_translations_cache.return_value = {}
+    _dirname = dirname or translations.__path__[0]
+    domain = babel.CustomDomain()
+    assert domain.get_translations() == _Translations.return_value
+    calls = [mock.call.load(translations.__path__[0], ["qux"], "admin")]
+    if dirname:
+        calls = [mock.call.load(dirname, ["qux"], "admin")] + calls
+    assert _Translations.method_calls == calls