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Fix the use of right hand expressions in operations (#13096)

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As reported by @maxim-uvarov and pyz in the dataframes discord channel:

```nushell
[[a b]; [1 1] [1 2] [2 1] [2 2] [3 1] [3 2]] | polars into-df | polars with-column ((polars col a) / (polars col b)) --name c


  × Type mismatch.
   ╭─[entry #45:1:102]
 1 │ [[a b]; [1 1] [1 2] [2 1] [2 2] [3 1] [3 2]] | polars into-df | polars with-column ((polars col a) / (polars col b)) --name c
   ·                                                                                                      ───────┬──────
   ·                                                                                                             ╰── Right hand side not a dataframe expression
   ╰────
```

This pull request corrects the type casting on the right hand side and
allows more than just polars literal expressions.
This commit is contained in:
Jack Wright 2024-06-09 19:44:04 -07:00 committed by GitHub
parent dc76183cd5
commit 650ae537c3
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GPG Key ID: B5690EEEBB952194
1 changed files with 10 additions and 39 deletions
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49
crates/nu_plugin_polars/src/dataframe/values/nu_expression/custom_value.rs
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@ -63,45 +63,16 @@ fn compute_with_value(
op: Span,
right: &Value,
) -> Result<Value, ShellError> {
let rhs_span = right.span();
match right {
Value::Custom { val: rhs, .. } => {
let rhs = rhs.as_any().downcast_ref::<NuExpression>().ok_or_else(|| {
ShellError::TypeMismatch {
err_message: "Right hand side not a dataframe expression".into(),
span: rhs_span,
}
})?;
match rhs.as_ref() {
polars::prelude::Expr::Literal(..) => with_operator(
(plugin, engine),
operator,
left,
rhs,
lhs_span,
right.span(),
op,
),
_ => Err(ShellError::TypeMismatch {
err_message: "Only literal expressions or number".into(),
span: right.span(),
}),
}
}
_ => {
let rhs = NuExpression::try_from_value(plugin, right)?;
with_operator(
(plugin, engine),
operator,
left,
&rhs,
lhs_span,
right.span(),
op,
)
}
}
let rhs = NuExpression::try_from_value(plugin, right)?;
with_operator(
(plugin, engine),
operator,
left,
&rhs,
lhs_span,
right.span(),
op,
)
}
fn with_operator(