Trait ValidationRule

pub trait ValidationRule<'a>: Visitor<'a, ValidationContext<'a>> + Default {
    // Provided method
    fn validate(ctx: &'a ASTContext, document: &'a Document<'a>) -> Result<()> { ... }
}

Trait for a ValidationRule that checks a given GraphQl document against its rules using a visitor.

A rule always implements a visitor and accepts the ValidationContext structure as its passed context.

Rules implement the Default trait, which allows them to be instantiated easily. The intention of using Default is for rules to not carry any external state as for GraphQL validation no external state is needed.

Provided Methods

fn validate(ctx: &'a ASTContext, document: &'a Document<'a>) -> Result<()>

Run this ValidationRule against the given document and return a result which errors if the rule fails on the document.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<'a> ValidationRule<'a> for KnownFragmentNames<'a>

impl<'a> ValidationRule<'a> for LoneAnonymousOperation

impl<'a> ValidationRule<'a> for NoFragmentCycles<'a>

impl<'a> ValidationRule<'a> for NoUndefinedVariables<'a>

impl<'a> ValidationRule<'a> for NoUnusedFragments<'a>

impl<'a> ValidationRule<'a> for UniqueArgumentNames<'a>

impl<'a> ValidationRule<'a> for UniqueFragmentNames<'a>

impl<'a> ValidationRule<'a> for UniqueOperationNames<'a>

impl<'a> ValidationRule<'a> for UniqueVariableNames<'a>

impl<'a, A, B> ValidationRule<'a> for ComposedVisitor<'a, ValidationContext<'a>, A, B>

where A: ValidationRule<'a>, B: ValidationRule<'a>,