posit-dev / posit-dev/ggsql

Vegalite writer fails to remove null-bars

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bug writer
Dominant language
Rust
Stars
554
Forks
30
Avg merge
17h 27m
Merged PRs (30d)
8

Description

Spotted in the docs. The following query in the discrete docs shows an obvious issue

VISUALISE species AS x FROM ggsql:penguins
DRAW bar
SCALE x FROM ('Adelie', 'Chinstrap')
SCALE y FROM (0, null)
Image

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the discrete docs example at https://ggsql.org/syntax/scale/type/discrete.html and reproduce the query shown there. Trace the Vega-Lite writer responsible for rendering the chart and verify that the completed change removes the unwanted null bars from this example.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust, sql
Domain
data-visualization
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
68/100

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