Struct Column 

pub struct Column {
    pub key: Option<KeySegment>,
    pub source_key: Option<Arc<str>>,
    pub format: Format,
    pub default: Option<Value>,
    pub datetime_mode: DateTimeMode,
    pub decimal_comma: bool,
}

Fields

key: Option<KeySegment>

Where a matched cell’s value lands in the output row. Some(KeySegment::Simple(_)) is a plain rename, functionally identical to the old Option<Arc<str>> this field used to be; the other variants describe nested/grouped placement – see key_segment.rs.

source_key: Option<Arc<str>>

Natural (auto-detected, snake_cased) key to match this override against, regardless of the column’s actual position. When None, the column applies positionally instead (matched by its index within the configured column list), as before.

format: Format

default: Option<Value>

datetime_mode: DateTimeMode

Rendering mode applied only when this column’s own format is Format::Auto and the source cell is already a genuine datetime (Data::DateTime/Data::DateTimeIso) – it has no effect on strings or numbers in that column, unlike Format::Date/Format::Time/Format::Hm/Format::DateTime, which force any cell type through date/time interpretation. Overrides the row-wide RowOptionSet::datetime_mode default when set to anything other than Full.

decimal_comma: bool

Implementations

impl Column

pub fn new(key_opt: Option<&str>) -> Self

build new column with an optional key name only

pub fn new_format(fmt: Format, default: Option<Value>) -> Self

build new column data type override and optional default

pub fn from_source_key_with_format( source_key: &str, key_opt: Option<&str>, format: Format, default: Option<Value>, datetime_mode: DateTimeMode, decimal_comma: bool, ) -> Self

build a column override matched by its natural (auto-detected) key rather than by position, e.g. to rename and/or reformat a single field out of many without needing to enumerate every column ahead of it.

pub fn from_json(json: &Value) -> Self

build new column data type override and optional default

pub fn set_format(self, fmt: Format) -> Self

pub fn set_default(self, val: Value) -> Self

pub fn set_datetime_mode(self, val: DateTimeMode) -> Self

pub fn set_decimal_comma(self, val: bool) -> Self

pub fn from_key_ref_with_format( key_opt: Option<&str>, format: Format, default: Option<Value>, datetime_mode: DateTimeMode, decimal_comma: bool, ) -> Self

pub fn key_name(&self) -> String

A flat, single-string fallback for contexts that only show one name per column (header/metadata listings) – for a plain rename (KeySegment::Simple) this is the whole story; for a nested key, see KeySegment’s own Display impl for what this collapses to.

pub fn source_key_name(&self) -> String

pub fn to_json(&self) -> Value

pub fn to_line(&self) -> String

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Column

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.