Trait DataContext

pub trait DataContext<'a> {
    // Required methods
    fn data<D: Any + Send + Sync>(&self) -> Result<&'a D>;
    fn data_unchecked<D: Any + Send + Sync>(&self) -> &'a D;
    fn data_opt<D: Any + Send + Sync>(&self) -> Option<&'a D>;
}

Data related functions of the context.

Required Methods

fn data<D: Any + Send + Sync>(&self) -> Result<&'a D>

Gets the global data defined in the Context or Schema.

If both Schema and Query have the same data type, the data in the Query is obtained.

Errors

Returns a Error if the specified type data does not exist.

fn data_unchecked<D: Any + Send + Sync>(&self) -> &'a D

Gets the global data defined in the Context or Schema.

Panics

It will panic if the specified data type does not exist.

fn data_opt<D: Any + Send + Sync>(&self) -> Option<&'a D>

Gets the global data defined in the Context or Schema or None if the specified type data does not exist.

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> DataContext<'a> for ExtensionContext<'a>

impl<'a, T> DataContext<'a> for ContextBase<'a, T>