Enum ColumnKind 

pub enum ColumnKind {
    Basic(ColumnType),
    Varchar(u32),
    Json,
    Decimal {
        precision: u32,
        scale: u32,
    },
}

What a column holds.

The shared subset delegates to the same mapping an Entity’s columns use, so a table built here and a table derived from a model cannot disagree about what Text renders as.

Variants

Basic(ColumnType)

One of the types an entity field can have.

Varchar(u32)

VARCHAR(n) — a length an entity cannot express.

Json

A JSON document. JSONB on Postgres, JSON on MySQL, TEXT on SQLite.

Decimal

A fixed-point number.

DECIMAL(p, s) on MySQL and Postgres. SQLite has no such type and renders REAL, which is a float — so an amount stored there is subject to the rounding this type exists to avoid. Store money as integer minor units if SQLite is a target you care about.

Fields

precision: u32

Total digits.

scale: u32

Digits after the point.

Trait Implementations

impl Clone for ColumnKind

fn clone(&self) -> ColumnKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ColumnKind

impl Debug for ColumnKind

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

Formats the value using the given formatter.

impl PartialEq for ColumnKind

fn eq(&self, other: &ColumnKind) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ColumnKind