Struct Column 

#[non_exhaustive]
pub struct Column {
    pub name: String,
    pub original_type: Option<String>,
    /* private fields */
}

Display-relevant column metadata held by a Vista.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

name: String

original_type: Option<String>

The backend’s or the spec’s name for the column’s type; None when nothing declares one (a YAML column without type:, a schemaless store).

Implementations

impl Column

pub fn family(&self) -> Option<ColumnFamily>

The family of the declared type; None when the column is untyped or its type names none of the families.

impl Column

pub fn new(name: impl Into<String>, original_type: impl Into<String>) -> Self

A column whose type is original_type.

pub fn untyped(name: impl Into<String>) -> Self

A column with no declared type.

pub fn with_flag(self, flag: impl Into<ColumnFlag>) -> Self

This column with flag added; a flag it already has is kept once. A flag is stored in its canonical form (Other("id") as Id).

pub fn has_flag(&self, flag: impl Into<ColumnFlag>) -> bool

pub fn flags(&self) -> &[ColumnFlag]

pub fn is_computed(&self) -> bool

Whether the Vista computes this column rather than reading it.

The expression isn’t serialized: a column that goes through serde comes back stored, keeping only its Calculated flag.

pub fn expression(&self) -> Option<&str>

The script of a computed column.

Trait Implementations

impl Clone for Column

fn clone(&self) -> Self

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.

impl<'de> Deserialize<'de> for Column

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Column

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.