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# Description As title # User-Facing Changes # Tests + Formatting Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # After Submitting If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date.
102 lines
2.8 KiB
Rust
102 lines
2.8 KiB
Rust
use super::super::super::values::NuDataFrame;
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use nu_engine::CallExt;
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use nu_protocol::{
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ast::Call,
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engine::{Command, EngineState, Stack},
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Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type,
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};
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use polars::prelude::{IntoSeries, Utf8Methods};
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#[derive(Clone)]
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pub struct AsDate;
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impl Command for AsDate {
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fn name(&self) -> &str {
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"as-date"
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}
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fn usage(&self) -> &str {
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r#"Converts string to date."#
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}
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fn extra_usage(&self) -> &str {
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r#"Format example:
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"%Y-%m-%d" => 2021-12-31
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"%d-%m-%Y" => 31-12-2021
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"%Y%m%d" => 2021319 (2021-03-19)"#
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}
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fn signature(&self) -> Signature {
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Signature::build(self.name())
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.required("format", SyntaxShape::String, "formatting date string")
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.switch("not-exact", "the format string may be contained in the date (e.g. foo-2021-01-01-bar could match 2021-01-01)", Some('n'))
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.input_type(Type::Custom("dataframe".into()))
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.output_type(Type::Custom("dataframe".into()))
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.category(Category::Custom("dataframe".into()))
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Converts string to date",
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example: r#"["2021-12-30" "2021-12-31"] | into df | as-datetime "%Y-%m-%d""#,
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result: None,
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}]
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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command(engine_state, stack, call, input)
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}
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}
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fn command(
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let format: String = call.req(engine_state, stack, 0)?;
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let not_exact = call.has_flag("not-exact");
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let df = NuDataFrame::try_from_pipeline(input, call.head)?;
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let series = df.as_series(call.head)?;
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let casted = series.utf8().map_err(|e| {
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ShellError::GenericError(
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"Error casting to string".into(),
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e.to_string(),
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Some(call.head),
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None,
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Vec::new(),
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)
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})?;
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let res = if not_exact {
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casted.as_date_not_exact(Some(format.as_str()))
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} else {
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casted.as_date(Some(format.as_str()), false)
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};
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let mut res = res
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.map_err(|e| {
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ShellError::GenericError(
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"Error creating datetime".into(),
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e.to_string(),
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Some(call.head),
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None,
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Vec::new(),
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)
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})?
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.into_series();
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res.rename("date");
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NuDataFrame::try_from_series(vec![res], call.head)
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.map(|df| PipelineData::Value(NuDataFrame::into_value(df, call.head), None))
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}
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