Struct MigrationPreview

Source

pub struct MigrationPreview<S: Schema> { /* private fields */ }

Expand description

Generated-schema-branded immutable provider-free migration preview.

Implementations§

Source §

impl<S: Schema> MigrationPreview<S>

Source

pub fn is_apply(&self) -> bool

Return whether this is a forward apply preview.

Source

pub fn execution_authorized(&self) -> bool

Preview objects never grant provider execution authority.

Source

pub fn len(&self) -> usize

Return the number of migrations in execution order.

Source

pub fn is_empty(&self) -> bool

Report whether the preview contains no migration work.

Source

pub fn entry(&self, index: usize) -> Option<MigrationPreviewEntry<'_>>

Inspect one migration by deterministic execution ordinal.

Source

pub fn approval_builder(&self) -> MigrationApprovalBuilder<S>

Begin selecting exact transitions that require explicit approval.

Source

pub fn authorize( &self, approvals: &MigrationApprovalSet<S>, ) -> Result<MigrationPlan<S>>

Rebuild a fresh executable plan from approvals owned by this preview.

Trait Implementations§

Source §

impl<S: Clone + Schema> Clone for MigrationPreview<S>

Source §

fn clone(&self) -> MigrationPreview<S>

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

Source §

impl<S: Debug + Schema> Debug for MigrationPreview<S>

Source §

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl<S> Freeze for MigrationPreview<S>
where PhantomData<fn() -> S>: Freeze,

§

impl<S> RefUnwindSafe for MigrationPreview<S>
where PhantomData<fn() -> S>: RefUnwindSafe,

§

impl<S> UnsafeUnpin for MigrationPreview<S>
where PhantomData<fn() -> S>: UnsafeUnpin,

§

impl<S> UnwindSafe for MigrationPreview<S>
where PhantomData<fn() -> S>: UnwindSafe,

Blanket Implementations§

Source §

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

Source §

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

Source §

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

Source §

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

Source §

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

Source §

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

Mutably borrows from an owned value. Read more

Source §

impl<T> CloneToUninit for T
where T: Clone,

Source §

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

Source §

impl<T> FromRef<T> for T
where T: Clone,

Source §

fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.

Source §

impl<T> Instrument for T

Source §

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Source §

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Source §

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

Source §

fn into(self) -> U

Calls U::from(self).

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

Source §

impl<T> IntoEither for T

Source §

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

Source §

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

Source §