Struct semilattice_database_session::Collection

pub struct Collection { /* private fields */ }

Implementations

impl Collection

pub fn new(data: Data, id: NonZeroI32, name: impl Into<String>) -> Collection

pub fn id(&self) -> NonZeroI32

pub fn name(&self) -> &str

pub fn data(&self) -> &Data

Methods from Deref<Target = Data>

pub fn result_condition<'life0, 'life_self, 'async_recursion>( &'life_self self, condition: &'life0 Condition<'_> ) -> Pin<Box<dyn Future<Output = BTreeSet<NonZeroU32>> + 'async_recursion>>

where 'life0: 'async_recursion, 'life_self: 'async_recursion,

Returns search results by specifying [Condition].

pub fn result_field( &self, field_name: &str, condition: &Field ) -> BTreeSet<NonZeroU32>

pub fn begin_search(&self) -> Search<'_>

Create a new [Search] object.

pub fn search_field<'a>( &'a self, field_name: &'a str, condition: &'a Field ) -> Search<'a>

Create a [Search] object with the field search set.

pub fn search_activity<'a>(&'a self, condition: Activity) -> Search<'a>

Create a [Search] object with the activity search set.

pub fn search_term<'a>(&'a self, condition: Term) -> Search<'a>

Create a [Search] object with the term search set.

pub fn search_row<'a>(&'a self, condition: &'a Number) -> Search<'a>

Create a [Search] object with the row search set.

pub fn search_default(&self) -> Search<'_>

Creates a [Search] object with a default search set. Searches for data whose term is greater than or equal to the current date and time and is active.

pub fn field_names(&self) -> Vec<&String>

Returns a list of field names.

pub fn field_bytes(&self, row: NonZeroU32, name: &str) -> &[u8]

Returns the value of the field with the specified name in the specified row as a slice.

pub fn field_num(&self, row: NonZeroU32, name: &str) -> f64

Returns the value of the field with the specified name in the specified row as a number.

pub async fn update(&mut self, operation: Operation) -> Option<NonZeroU32>

Perform operations to register, update, and delete data.

pub fn sort( &self, rows: &BTreeSet<NonZeroU32>, orders: &[Order] ) -> Vec<NonZeroU32>

Sort search results.

pub fn serial(&self, row: NonZeroU32) -> u32

Returns a serial number.The serial number is incremented each time data is added.

pub fn uuid(&self, row: NonZeroU32) -> Option<u128>

Returns a UUID.UUID is a unique ID that is automatically generated when data is registered..

pub fn uuid_string(&self, row: NonZeroU32) -> Option<String>

Returns the UUID as a string.

pub fn activity(&self, row: NonZeroU32) -> Option<Activity>

Returns the activity value. activity is used to indicate whether data is valid or invalid.

pub fn term_begin(&self, row: NonZeroU32) -> Option<u64>

Returns the start date and time of the data’s validity period.

pub fn term_end(&self, row: NonZeroU32) -> Option<u64>

Returns the end date and time of the data’s validity period.

pub fn last_updated(&self, row: NonZeroU32) -> Option<u64>

Returns the date and time when the data was last updated.

pub fn all(&self) -> BTreeSet<NonZeroU32>

Returns all rows.

Trait Implementations

impl Deref for Collection

type Target = Data

The resulting type after dereferencing.

fn deref(&self) -> &<Collection as Deref>::Target

Dereferences the value.

impl DerefMut for Collection

fn deref_mut(&mut self) -> &mut <Collection as Deref>::Target

Mutably dereferences the value.