Enum BeforeMutationOutcome 

#[non_exhaustive]
pub enum BeforeMutationOutcome {
    Proceed,
    ProceedWith {
        arguments: Value,
    },
    Abort {
        reason: String,
    },
}

What the engine does next with the write.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Proceed

Run the write with the arguments it already had.

ProceedWith

Run the write with these arguments instead. They replace the whole argument view the engine binds from, so an implementation that rewrites one key must return the other keys too.

Fields

arguments: Value

The argument object the write will run with.

Abort

Do not run the write. reason is folded into a FraiseQLError::Validation and reaches the client verbatim — it is the rule’s own message, not engine text.

Fields

reason: String

The client-facing reason the write was refused.

Trait Implementations

impl Debug for BeforeMutationOutcome

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

Formats the value using the given formatter.