Struct holochain_zome_types::header::Update
source · [−]pub struct Update {
pub author: AgentPubKey,
pub timestamp: Timestamp,
pub header_seq: u32,
pub prev_header: HeaderHash,
pub original_header_address: HeaderHash,
pub original_entry_address: EntryHash,
pub entry_type: EntryType,
pub entry_hash: EntryHash,
}
Expand description
A header which specifies that some new Entry content is intended to be an update to some old Entry.
This header semantically updates an entry to a new entry. It has the following effects:
- Create a new Entry
- This is the header of that new entry
- Create a metadata relationship between the original entry and this new header
The original header is required to prevent update loops: If you update A to B and B back to A, and then you don’t know which one came first, or how to break the loop.
Fields
timestamp: Timestamp
header_seq: u32
prev_header: HeaderHash
original_header_address: HeaderHash
original_entry_address: EntryHash
entry_type: EntryType
entry_hash: EntryHash
Implementations
sourceimpl Update
impl Update
pub fn from_builder(
common: HeaderBuilderCommon,
original_entry_address: EntryHash,
original_header_address: HeaderHash,
entry_type: EntryType,
entry_hash: EntryHash
) -> Self
Trait Implementations
sourceimpl<'arbitrary> Arbitrary<'arbitrary> for Update
impl<'arbitrary> Arbitrary<'arbitrary> for Update
sourcefn arbitrary(u: &mut Unstructured<'arbitrary>) -> Result<Self>
fn arbitrary(u: &mut Unstructured<'arbitrary>) -> Result<Self>
Generate an arbitrary value of Self
from the given unstructured data. Read more
sourcefn arbitrary_take_rest(u: Unstructured<'arbitrary>) -> Result<Self>
fn arbitrary_take_rest(u: Unstructured<'arbitrary>) -> Result<Self>
Generate an arbitrary value of Self
from the entirety of the given unstructured data. Read more
sourceimpl<'de> Deserialize<'de> for Update
impl<'de> Deserialize<'de> for Update
sourcefn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
sourceimpl HeaderBuilder<Update> for Update
impl HeaderBuilder<Update> for Update
fn build(self, common: HeaderBuilderCommon) -> Update
sourceimpl HeaderInner for Update
impl HeaderInner for Update
sourcefn into_header(self) -> Header
fn into_header(self) -> Header
Get a full header from the subset
sourceimpl TryFrom<&'_ Update> for SerializedBytes
impl TryFrom<&'_ Update> for SerializedBytes
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
sourcefn try_from(t: &Update) -> Result<SerializedBytes, SerializedBytesError>
fn try_from(t: &Update) -> Result<SerializedBytes, SerializedBytesError>
Performs the conversion.
sourceimpl TryFrom<SerializedBytes> for Update
impl TryFrom<SerializedBytes> for Update
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
sourcefn try_from(sb: SerializedBytes) -> Result<Update, SerializedBytesError>
fn try_from(sb: SerializedBytes) -> Result<Update, SerializedBytesError>
Performs the conversion.
sourceimpl TryFrom<Update> for SerializedBytes
impl TryFrom<Update> for SerializedBytes
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
sourcefn try_from(t: Update) -> Result<SerializedBytes, SerializedBytesError>
fn try_from(t: Update) -> Result<SerializedBytes, SerializedBytesError>
Performs the conversion.
impl Eq for Update
impl StructuralEq for Update
impl StructuralPartialEq for Update
Auto Trait Implementations
impl RefUnwindSafe for Update
impl Send for Update
impl Sync for Update
impl Unpin for Update
impl UnwindSafe for Update
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
sourcepub fn equivalent(&self, key: &K) -> bool
pub fn equivalent(&self, key: &K) -> bool
Compare self to key
and return true
if they are equal.
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcepub fn to_owned(&self) -> T
pub fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
sourcepub fn clone_into(&self, target: &mut T)
pub fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
pub fn vzip(self) -> V
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more