Prepending panel to Template does not work. #1736
Description
ALL software version info
Panel 0.10.1
Description of expected behavior and the observed behavior
When main of a Template is a List I would expect to be able to prepend items to the list.
I need this functionality to enable a work flow where every application in our site automatically gets wrapped with a generic header (=Card with title, info and links). So we would develop our application via a Template and fill in main. But then we would prepend the info header automatically
Complete, minimal, self-contained example code that reproduces the issue
import panel as pn
def _create_app():
view = pn.pane.Markdown("App View")
app=pn.template.MaterialTemplate()
app.main[:]=[view] # There might be a list of elements
# Something done automatically for all apps in the site
info_card = pn.pane.Markdown("Info Card")
app.main.insert(0, info_card)
return app
def test_app():
app = _create_app()
main_items = [item[0] for item in app._render_items.values() if "main" in item[1]]
assert main_items[0].object=="Info Card"
assert main_items[1].object=="App View"
if __name__.startswith("bokeh"):
_create_app().servable()
Screenshots or screencasts of the bug in action
python -m panel serve 'scripts\issue_render_items.py' --dev
`pytest 'scripts\issue_render_items.py'
$ pytest 'scripts\issue_render_items.py'
Test session starts (platform: win32, Python 3.7.6, pytest 5.4.2, pytest-sugar 0.9.3)
rootdir: C:\repos\private\awesome-panel, inifile: pytest.ini
plugins: cov-2.8.1, mock-3.1.0, sugar-0.9.3
collecting ...
――――――――――――――――――――――――――――――――――――――― test_app ―――――――――――――――――――――――――――――――――――――――
def test_app():
app = _create_app()
main_items = [item[0] for item in app._render_items.values() if "main" in item[1]]
> assert main_items[0].object=="Info Card"
E AssertionError: assert 'App View' == 'Info Card'
E - Info Card
E + App View
scripts\issue_render_items.py:17: AssertionError
scripts/issue_render_items.py ⨯ 100% ██████████
=============================== short test summary info ================================
FAILED scripts/issue_render_items.py::test_app - AssertionError: assert 'App View' == ...
Results (1.47s):
1 failed
- scripts/issue_render_items.py:13 test_app