Enum DataType 

pub enum DataType {
    Null,
    Integer,
    Real,
    Text {
        max_length: Option<usize>,
    },
    Blob {
        max_length: Option<usize>,
    },
    Boolean,
    Date,
    Datetime,
}

数据类型定义

Variants

Null

Integer

Real

Text

Fields

max_length: Option<usize>

Blob

Fields

max_length: Option<usize>

Boolean

Date

Datetime

Implementations

impl DataType

pub fn null() -> Self

pub fn integer() -> Self

pub fn real() -> Self

pub fn text() -> Self

pub fn text_with_max(max_length: usize) -> Self

pub fn blob() -> Self

pub fn blob_with_max(max_length: usize) -> Self

pub fn boolean() -> Self

pub fn date() -> Self

pub fn datetime() -> Self

pub fn validate(&self, value: &DbValue) -> bool

验证值是否与该类型兼容

Trait Implementations

impl Clone for DataType

fn clone(&self) -> DataType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataType

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DataType

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DataType

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

Formats the value using the given formatter.

impl PartialEq for DataType

fn eq(&self, other: &DataType) -> 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 Serialize for DataType

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DataType