Enum DbValue 

pub enum DbValue {
    Null,
    Integer(i64),
    Real(f64),
    Text(String),
    Blob(Vec<u8>),
    Boolean(bool),
    Date(i64),
    Datetime(i64),
}

数据库值类型 - 支持 8 种基本类型

Variants

Null

Integer(i64)

Real(f64)

Text(String)

Blob(Vec<u8>)

Boolean(bool)

Date(i64)

Datetime(i64)

Implementations

impl DbValue

pub fn null() -> Self

pub fn integer(v: i64) -> Self

pub fn real(v: f64) -> Self

pub fn text(v: impl Into<String>) -> Self

pub fn blob(v: Vec<u8>) -> Self

pub fn boolean(v: bool) -> Self

pub fn date(v: i64) -> Self

pub fn datetime(v: i64) -> Self

pub fn as_integer(&self) -> Option<i64>

pub fn as_real(&self) -> Option<f64>

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

pub fn as_blob(&self) -> Option<&[u8]>

pub fn as_boolean(&self) -> Option<bool>

pub fn as_date(&self) -> Option<i64>

pub fn as_datetime(&self) -> Option<i64>

pub fn is_null(&self) -> bool

pub fn type_name(&self) -> &'static str

Trait Implementations

impl Clone for DbValue

fn clone(&self) -> DbValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DbValue

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DbValue

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DbValue

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

Formats the value using the given formatter.

impl Hash for DbValue

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for DbValue

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for DbValue

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for DbValue

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for DbValue

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for DbValue

impl StructuralPartialEq for DbValue