Struct ForeignKeyDef 

pub struct ForeignKeyDef {
    pub name: String,
    pub column: String,
    pub ref_table: String,
    pub ref_column: String,
    pub on_update: ReferentialAction,
    pub on_delete: ReferentialAction,
}

外键定义

Fields

name: String

外键名称

column: String

本表列名

ref_table: String

引用表名

ref_column: String

引用列名

on_update: ReferentialAction

更新行为

on_delete: ReferentialAction

删除行为

Implementations

impl ForeignKeyDef

pub fn new( name: impl Into<String>, column: impl Into<String>, ref_table: impl Into<String>, ref_column: impl Into<String>, ) -> Self

创建新的外键定义

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

设置更新时的引用行为

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

设置删除时的引用行为

pub fn to_constraint_sql(&self) -> String

生成约束 SQL 片段

pub fn to_add_sql(&self, table_name: &str) -> String

生成添加外键约束 SQL

pub fn to_drop_sql(&self, table_name: &str) -> String

生成删除外键约束 SQL

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.

impl<'de> Deserialize<'de> for ForeignKeyDef

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ForeignKeyDef

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

where __S: Serializer,

Serialize this value into the given Serde serializer.