Passing all zeroes to the funnel visualization crashes the renderer

[susodapop]

Issue Summary

If all stages of a funnel chart return zero, the funnel chart crashes and takes the renderer with it. Adding this visualization to a dashboard makes the entire dashboard crash on load.

Steps to Reproduce

1. In postgres use the following SQL:

SELECT * FROM (VALUES 
('foo', 0),
('bar', 0),
('baz', 0),
('foobar', 0)) data(stage,value)

It produces the following table:

stage	value
foo	0
bar	0
baz	0
foobar	0

2. Add a funnel visualization with the the stage and value columns.
3. Observe the chart does not render.
4. Save the visualization and try clicking the Edit Visualization button. It won't work.

This is probably a divide-by-zero error.

Technical details:

• Redash Version: v9 Alpha
• Browser/OS: FF
• How did you install Redash: SaaS

[srs231198]

A simple check before any calculations should solve the issue... Do you still require assistance with this?

[susodapop]

Thanks @srs231198. This has been solved already in the migration to React. Specifically this is fixed in #4267