Enum ValidationError 

pub enum ValidationError {
    Required {
        field: String,
    },
    Length {
        field: String,
        min: usize,
        max: usize,
        actual: usize,
    },
    Range {
        field: String,
        min: String,
        max: String,
        actual: String,
    },
    Email {
        field: String,
        value: String,
    },
    Regex {
        field: String,
        pattern: String,
        value: String,
    },
    Contains {
        field: String,
        substring: String,
    },
    DoesNotContain {
        field: String,
        substring: String,
    },
    Custom {
        field: String,
        reason: String,
    },
    Aggregate {
        errors: Vec<ValidationError>,
        count: usize,
    },
}

验证错误

字段级含义由各 variant 的 #[error(...)] 文案描述（field/min/max/value 等）。

Variants

Required

必填字段为空

Fields

field: String

Length

长度超出范围

Fields

field: String

min: usize

max: usize

actual: usize

Range

数值超出范围

Fields

field: String

min: String

max: String

actual: String

Email

邮箱格式无效

Fields

field: String

value: String

Regex

正则不匹配

Fields

field: String

pattern: String

value: String

Contains

不包含所需子串

Fields

field: String

substring: String

DoesNotContain

包含禁止子串

Fields

field: String

substring: String

Custom

自定义校验失败

Fields

field: String

reason: String

Aggregate

聚合错误（非短路，收集全部失败）

Fields

errors: Vec<ValidationError>

count: usize

Trait Implementations

impl Clone for ValidationError

fn clone(&self) -> ValidationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValidationError

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

Formats the value using the given formatter.

impl Display for ValidationError

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

Formats the value using the given formatter.

impl Eq for ValidationError

impl Error for ValidationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for ValidationError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ValidationError