Enum DatabaseResult 

pub enum DatabaseResult<T> {
    Return(T),
    Error(String),
    NamedReturns(HashMap<String, T>),
}

数据库查询期望

Variants

Return(T)

返回指定值

Error(String)

返回错误

NamedReturns(HashMap<String, T>)

根据查询名称匹配返回

Implementations

impl<T: Clone> DatabaseResult<T>

pub fn return_value(value: T) -> Self

创建返回值

pub fn error(msg: impl Into<String>) -> Self

创建错误返回

pub fn named_returns(map: HashMap<String, T>) -> Self

创建命名返回映射

Trait Implementations

impl<T: Clone> Clone for DatabaseResult<T>

fn clone(&self) -> DatabaseResult<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for DatabaseResult<T>

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

Formats the value using the given formatter.