isolate templates between blueprints

flask/templating.py

@@ -89,7 +89,10 @@ class DispatchingJinjaLoader(BaseLoader):
         if loader is not None:
             yield self.app, loader
 
+        blueprint_name = _request_ctx_stack.top.request.blueprint
         for blueprint in self.app.iter_blueprints():
+            if blueprint.name != blueprint_name:
+                continue
             loader = blueprint.jinja_loader
             if loader is not None:
                 yield blueprint, loader

tests/test_apps/blueprintapp/apps/admin/__init__.py

@@ -10,6 +10,11 @@ def index():
     return render_template('admin/index.html')
 
 
+@admin.route('/admin')
+def admin_control():
+    return render_template('index.html')
+
+
 @admin.route('/index2')
 def index2():
     return render_template('./admin/index.html')

tests/test_apps/blueprintapp/apps/admin/templates/index.html

@@ -0,0 +1 @@
+admin

tests/test_apps/blueprintapp/apps/frontend/__init__.py

@@ -8,6 +8,11 @@ def index():
     return render_template('frontend/index.html')
 
 
+@frontend.route('/frontend')
+def frontend_control():
+    return render_template('index.html')
+
+
 @frontend.route('/missing')
 def missing_template():
     return render_template('missing_template.html')

tests/test_apps/blueprintapp/apps/frontend/templates/index.html

@@ -0,0 +1 @@
+frontend

tests/test_templating.py

@@ -390,3 +390,12 @@ def test_custom_jinja_env():
 
     app = CustomFlask(__name__)
     assert isinstance(app.jinja_env, CustomEnvironment)
+
+def test_blueprint_template_isolation(test_apps):
+    from blueprintapp import app
+
+    rv1 = app.test_client().get('/admin/admin')
+    rv2 = app.test_client().get('/frontend')
+
+    assert rv1.data == b'admin'
+    assert rv2.data == b'frontend'