Struct dittolive_ditto::store::query_builder::Collection

pub struct Collection { /* private fields */ }

Use ditto.store().collection("...")? to query or mutate documents in a Collection.

Implementations

impl Collection

pub fn name(&self) -> &str

Returns the name of this Collection.

Example

let cars = ditto.store().collection("cars")?;
assert_eq!(cars.name(), "cars");

pub fn find_all(&self) -> PendingCursorOperation<'_>

Query all documents in the named collection.

This produces a PendingCursorOperation which may be used to perform subsequent operations on the queried documents, in this case all documents in the named collection.

Example

use dittolive_ditto::prelude::*;
let collection = ditto.store().collection("cars")?;
let pending_op = collection.find_all();
let documents: Vec<_> = pending_op.exec()?;

pub fn find(&self, query: &str) -> PendingCursorOperation<'_>

Queries documents in the named collection according to the given QueryBuilder query string.

Note: The query strings accepted here are NOT Ditto-Query-Language (DQL) queries. If you can achieve your use-case via a DQL query, we recommend you do that instead. See the DQL module docs for more info about DQL.

This produces a PendingCursorOperation which may be used to perform subsequent operations on the queried documents, in this case all documents in the named collection.

For more details about the query syntax accepted here, see the query_builder module documentation

pub fn find_with_args<V: Serialize, C: Borrow<V>>( &self, query: &str, query_args: C, ) -> PendingCursorOperation<'_>

Generates a PendingCursorOperation with the provided query and query arguments that can be used to find the documents matching the query at a point in time or you can chain a call to PendingCursorOperation::observe_local or PendingCursorOperation::subscribe if you want to get updates about documents matching the query as they occur. It can also be used to update, remove, or evict documents.

This is the recommended function to use when performing queries on a collection if you have any dynamic data included in the query string. It allows you to provide a query string with placeholders, in the form of $args.my_arg_name, along with an accompanying dictionary of arguments, in the form of { "my_arg_name": "some value" }, and the placeholders will be appropriately replaced by the matching provided arguments from the dictionary. This includes handling things like wrapping strings in quotation marks and arrays in square brackets, for example.

pub fn find_by_id( &self, doc_id: impl Into<DocumentId>, ) -> PendingIdSpecificOperation

Generates a PendingIdSpecificOperation with the provided document Id that can be used to find the document at a point in time or you can chain a call to PendingIdSpecificOperation::observe_local or PendingIdSpecificOperation::subscribe if you want to get updates about the document over time. It can also be used to update, remove, or evict the document.

impl Collection

pub fn upsert<V: Serialize, C: Borrow<V>>( &self, content: C, ) -> Result<DocumentId, DittoError>

Inserts a new document into the collection and returns its Id. If the document already exists, the provided document content will be merged with the existing document’s content.

pub fn upsert_with_strategy<V: Serialize, C: Borrow<V>>( &self, content: C, write_strategy: WriteStrategy, ) -> Result<DocumentId, DittoError>

Inserts a new document into the collection and returns its Id. If the document already exists, the behavior is determined by the provided write_strategy.

Trait Implementations

impl Clone for Collection

fn clone(&self) -> Collection

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Collection

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

Formats the value using the given formatter.