Enum MigrationError

pub enum MigrationError {
    DecodeFailed(String),
    EncodeFailed(String),
    StepMissing {
        from: u32,
        to: u32,
    },
}

Expand description

Migration step failure. Wraps strategy-specific errors as text so the runner can keep its surface narrow.

Variants§

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DecodeFailed(String)

The payload could not be decoded with the source-version reader.

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EncodeFailed(String)

The payload could not be re-encoded with the target-version writer.

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StepMissing

A migration matched but is missing for one of the steps in the chain.

Fields

§from: u32

Source version that was reached.

§to: u32

Target version that has no registered migration.

Trait Implementations§

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impl Debug for MigrationError

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

Formats the value using the given formatter. Read more

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impl Display for MigrationError

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for MigrationError

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> AppLifecycle for T
where T: ?Sized,

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fn on_start(&mut self, ctx: &mut dyn AppContext)

Called once after the backend is up but before the first update. Apps install their theme / fonts here.

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fn on_exit(&mut self)

Called once when the window is closing. Persist state here.

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impl<T> AsAny for T
where T: Any,

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fn as_any(&self) -> &(dyn Any + 'static)

Returns a reference to the inner value as &dyn Any.

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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