Struct DatabaseQuery 

pub struct DatabaseQuery { /* private fields */ }

Represents a composable database query, analogous to the JS QueryImpl (packages/database/src/api/Reference_impl.ts).

Implementations

impl DatabaseQuery

pub fn reference(&self) -> &DatabaseReference

Exposes the underlying reference backing this query.

pub fn order_by_child(self, path: &str) -> DatabaseResult<Self>

Orders children by the given path, mirroring orderByChild().

pub fn order_by_key(self) -> DatabaseResult<Self>

Orders children by key, mirroring orderByKey().

pub fn order_by_value(self) -> DatabaseResult<Self>

Orders children by value, mirroring orderByValue().

pub fn order_by_priority(self) -> DatabaseResult<Self>

Orders children by priority, mirroring orderByPriority().

pub fn start_at(self, value: Value) -> DatabaseResult<Self>

Applies a startAt() constraint to the query.

pub fn start_at_with_key( self, value: Value, name: Option<String>, ) -> DatabaseResult<Self>

Applies a keyed startAt(value, name) constraint to the query.

pub fn start_after(self, value: Value) -> DatabaseResult<Self>

Applies a startAfter() constraint to the query.

pub fn start_after_with_key( self, value: Value, name: Option<String>, ) -> DatabaseResult<Self>

Applies a keyed startAfter(value, name) constraint to the query.

pub fn end_at(self, value: Value) -> DatabaseResult<Self>

Applies an endAt() constraint to the query.

pub fn end_at_with_key( self, value: Value, name: Option<String>, ) -> DatabaseResult<Self>

Applies a keyed endAt(value, name) constraint to the query.

pub fn end_before(self, value: Value) -> DatabaseResult<Self>

Applies an endBefore() constraint to the query.

pub fn end_before_with_key( self, value: Value, name: Option<String>, ) -> DatabaseResult<Self>

Applies a keyed endBefore(value, name) constraint to the query.

pub fn limit_to_first(self, limit: u32) -> DatabaseResult<Self>

Applies limitToFirst() to the query.

pub fn limit_to_last(self, limit: u32) -> DatabaseResult<Self>

Applies limitToLast() to the query.

pub fn equal_to(self, value: Value) -> DatabaseResult<Self>

Applies equalTo() to the query.

pub fn equal_to_with_key( self, value: Value, name: Option<String>, ) -> DatabaseResult<Self>

Applies a keyed equalTo(value, name) constraint to the query.

pub async fn get(&self) -> DatabaseResult<Value>

Executes the query and returns the JSON payload, mirroring JS get().

pub async fn on_value<F>( &self, callback: F, ) -> DatabaseResult<ListenerRegistration>

where F: Fn(Result<DataSnapshot, DatabaseError>) + Send + Sync + 'static,

Registers a value listener for this query, mirroring onValue(query, cb).

Trait Implementations

impl Clone for DatabaseQuery

fn clone(&self) -> DatabaseQuery

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DatabaseQuery

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

Formats the value using the given formatter.