Struct ForeignKeyDef 

pub struct ForeignKeyDef {
    pub name: String,
    pub column: String,
    pub referenced_table: String,
    pub referenced_column: String,
    pub on_delete: Option<String>,
    pub on_update: Option<String>,
}

外键定义

Fields

name: String

约束名

column: String

本表列名

referenced_table: String

引用表名

referenced_column: String

引用列名

on_delete: Option<String>

ON DELETE 动作

on_update: Option<String>

ON UPDATE 动作

Implementations

impl ForeignKeyDef

pub fn new( name: &str, column: &str, referenced_table: &str, referenced_column: &str, ) -> Self

创建外键定义，指定约束名、本表列、引用表和引用列

pub fn on_delete(self, action: &str) -> Self

设置 ON DELETE 动作

pub fn on_update(self, action: &str) -> Self

设置 ON UPDATE 动作

Trait Implementations

impl Clone for ForeignKeyDef

fn clone(&self) -> ForeignKeyDef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ForeignKeyDef

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

Formats the value using the given formatter.