Struct AsyncExistsRule 

pub struct AsyncExistsRule {
    pub table: String,
    pub column: String,
    pub message: Option<String>,
}

Database existence validation rule.

Validates that a value exists in a database table column.

Fields

table: String

Database table name

column: String

Column name to check

message: Option<String>

Custom error message

Implementations

impl AsyncExistsRule

pub fn new(table: impl Into<String>, column: impl Into<String>) -> Self

Create a new existence rule.

pub fn with_message(self, message: impl Into<String>) -> Self

Set a custom error message.

Trait Implementations

impl AsyncValidationRule<String> for AsyncExistsRule

fn validate_async<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, value: &'life1 String, ctx: &'life2 ValidationContext, ) -> Pin<Box<dyn Future<Output = Result<(), RuleError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Validate the value asynchronously.

fn rule_name(&self) -> &'static str

Get the rule name/code for error reporting.

fn default_message(&self) -> String

Get the default error message for this rule.

impl AsyncValidationRule<str> for AsyncExistsRule

fn validate_async<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, value: &'life1 str, ctx: &'life2 ValidationContext, ) -> Pin<Box<dyn Future<Output = Result<(), RuleError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Validate the value asynchronously.

fn rule_name(&self) -> &'static str

Get the rule name/code for error reporting.

fn default_message(&self) -> String

Get the default error message for this rule.

impl Clone for AsyncExistsRule

fn clone(&self) -> AsyncExistsRule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AsyncExistsRule

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AsyncExistsRule

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<AsyncExistsRule> for SerializableRule

fn from(rule: AsyncExistsRule) -> Self

Converts to this type from the input type.

impl PartialEq for AsyncExistsRule

fn eq(&self, other: &AsyncExistsRule) -> 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 AsyncExistsRule

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 AsyncExistsRule