Struct holochain::prelude::Update

pub struct Update<W = EntryRateWeight> {
    pub author: HoloHash<Agent>,
    pub timestamp: Timestamp,
    pub action_seq: u32,
    pub prev_action: HoloHash<Action>,
    pub original_action_address: HoloHash<Action>,
    pub original_entry_address: HoloHash<Entry>,
    pub entry_type: EntryType,
    pub entry_hash: HoloHash<Entry>,
    pub weight: W,
}

A action which specifies that some new Entry content is intended to be an update to some old Entry.

This action semantically updates an entry to a new entry. It has the following effects:

• Create a new Entry
• This is the action of that new entry
• Create a metadata relationship between the original entry and this new action

The original action 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

author: HoloHash<Agent>

timestamp: Timestamp

action_seq: u32

prev_action: HoloHash<Action>

original_action_address: HoloHash<Action>

original_entry_address: HoloHash<Entry>

entry_type: EntryType

entry_hash: HoloHash<Entry>

weight: W

Implementations

impl Update<EntryRateWeight>

pub fn from_builder( common: ActionBuilderCommon, original_entry_address: HoloHash<Entry>, original_action_address: HoloHash<Action>, entry_type: EntryType, entry_hash: HoloHash<Entry> ) -> Update<EntryRateWeight>

Trait Implementations

impl ActionBuilder<Update<()>> for Update

fn build(self, common: ActionBuilderCommon) -> Update<()>

impl ActionUnweighed for Update<()>

type Weighed = Update<EntryRateWeight>

type Weight = EntryRateWeight

fn weighed(self, weight: EntryRateWeight) -> Update<EntryRateWeight>

Add a weight to this unweighed action, making it “weighed”. The weight is determined by the weigh callback, which is run on the unweighed version of this action.

fn weightless(self) -> Self::Weighed

Add zero weight to this unweighed action, making it “weighed”.

impl ActionWeighed for Update<EntryRateWeight>

type Unweighed = Update<()>

type Weight = EntryRateWeight

fn into_action(self) -> Action

Construct the full Action enum with this variant.

fn unweighed(self) -> Update<()>

Erase the rate limiting weight info, creating an “unweighed” version of this action. This is used primarily by validators who need to run the weigh callback on an action they received, and want to make sure their callback is not using the predefined weight to influence the result.

impl<'arbitrary, W> Arbitrary<'arbitrary> for Update<W>where W: Arbitrary<'arbitrary>,

fn arbitrary(u: &mut Unstructured<'arbitrary>) -> Result<Update<W>, Error>

Generate an arbitrary value of Self from the given unstructured data.

fn arbitrary_take_rest(u: Unstructured<'arbitrary>) -> Result<Update<W>, Error>

Generate an arbitrary value of Self from the entirety of the given unstructured data.

fn size_hint(depth: usize) -> (usize, Option<usize>)

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

impl<W> Clone for Update<W>where W: Clone,

fn clone(&self) -> Update<W>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<W> Debug for Update<W>where W: Debug,

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

Formats the value using the given formatter.

impl<'de, W> Deserialize<'de> for Update<W>where W: Deserialize<'de>,

fn deserialize<__D>( __deserializer: __D ) -> Result<Update<W>, <__D as Deserializer<'de>>::Error>where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a> From<&'a Update<EntryRateWeight>> for NewEntryActionRef<'a>

fn from(original: &'a Update<EntryRateWeight>) -> NewEntryActionRef<'a>

Converts to this type from the input type.

impl From<Update<EntryRateWeight>> for EntryCreationAction

fn from(u: Update<EntryRateWeight>) -> EntryCreationAction

Converts to this type from the input type.

impl From<Update<EntryRateWeight>> for NewEntryAction

fn from(original: Update<EntryRateWeight>) -> NewEntryAction

Converts to this type from the input type.

impl<W> Hash for Update<W>where W: Hash,

fn hash<__H>(&self, state: &mut __H)where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl HashableContent for Update<EntryRateWeight>

type HashType = Action

The HashType which this content will be hashed to

fn hash_type(&self) -> <Update<EntryRateWeight> as HashableContent>::HashType

The HashType which this content will be hashed to

fn hashable_content(&self) -> HashableContentBytes

Return a subset of the content, either as SerializedBytes “content”, which will be used to compute the hash, or as an already precomputed hash which will be used directly

impl<W> PartialEq<Update<W>> for Update<W>where W: PartialEq<W>,

fn eq(&self, other: &Update<W>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<W> Serialize for Update<W>where W: Serialize,

fn serialize<__S>( &self, __serializer: __S ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'a> TryFrom<&'a Action> for &'a Update<EntryRateWeight>

type Error = WrongActionError

The type returned in the event of a conversion error.

fn try_from( value: &'a Action ) -> Result<&'a Update<EntryRateWeight>, <&'a Update<EntryRateWeight> as TryFrom<&'a Action>>::Error>

Performs the conversion.

impl TryFrom<&Update<EntryRateWeight>> for SerializedBytes

type Error = SerializedBytesError

The type returned in the event of a conversion error.

fn try_from( t: &Update<EntryRateWeight> ) -> Result<SerializedBytes, SerializedBytesError>

Performs the conversion.

impl TryFrom<Action> for Update<EntryRateWeight>

type Error = WrongActionError

The type returned in the event of a conversion error.

fn try_from( value: Action ) -> Result<Update<EntryRateWeight>, <Update<EntryRateWeight> as TryFrom<Action>>::Error>

Performs the conversion.

impl TryFrom<SerializedBytes> for Update<EntryRateWeight>

type Error = SerializedBytesError

The type returned in the event of a conversion error.

fn try_from( sb: SerializedBytes ) -> Result<Update<EntryRateWeight>, SerializedBytesError>

Performs the conversion.

impl TryFrom<Update<EntryRateWeight>> for SerializedBytes

type Error = SerializedBytesError

The type returned in the event of a conversion error.

fn try_from( t: Update<EntryRateWeight> ) -> Result<SerializedBytes, SerializedBytesError>

Performs the conversion.

impl<W> Eq for Update<W>where W: Eq,

impl<W> StructuralEq for Update<W>

impl<W> StructuralPartialEq for Update<W>