Enum MongoCondition 

pub enum MongoCondition {
    Doc(Document),
    Deferred(DeferredFn<AnyMongoType>),
    And(Vec<MongoCondition>),
}

A MongoDB filter condition that can contain deferred values.

Variants

• Doc — an immediate bson::Document filter, e.g. doc! { "price": { "$gt": 100 } }
• Deferred — resolves async at query time via DeferredFn<AnyMongoType>. The resolved AnyMongoType must be a Bson::Document.
• And — combines multiple conditions with $and semantics.

Variants

Doc(Document)

Immediate filter document.

Deferred(DeferredFn<AnyMongoType>)

Async-resolved filter — the DeferredFn should produce an AnyMongoType wrapping a Bson::Document.

And(Vec<MongoCondition>)

Multiple conditions combined with $and.

Implementations

impl MongoCondition

pub fn resolve( &self, ) -> Pin<Box<dyn Future<Output = Result<Document>> + Send + '_>>

Resolve all deferred values and merge into a single bson::Document.

impl MongoCondition

pub fn eq_bool(&self, value: bool) -> MongoCondition

.eq(false) negates the condition; .eq(true) is identity. This is the MongoCondition-aware version that overrides the blanket.

pub fn ne_bool(&self, value: bool) -> MongoCondition

.ne(false) is identity; .ne(true) negates.

Trait Implementations

impl Clone for MongoCondition

fn clone(&self) -> MongoCondition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MongoCondition

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

Formats the value using the given formatter.

impl Expressive<AnyMongoType> for MongoCondition

fn expr(&self) -> Expression<AnyMongoType>

Convert this construct into an Expression<T>.

fn preview(&self) -> String

where T: Debug + Display,

Preview the expression as a formatted string.

impl From<Document> for MongoCondition

fn from(doc: Document) -> Self

Converts to this type from the input type.

impl Selectable<AnyMongoType, MongoCondition> for MongoSelect

fn add_source( &mut self, source: impl Into<SourceRef<AnyMongoType>>, _alias: Option<String>, )

Adds a data source to the FROM clause (table name, subquery, etc.). This is additive — calling it multiple times adds comma-separated sources.

fn add_field(&mut self, field: impl Into<String>)

Adds a column name to the SELECT clause.

fn add_expression(&mut self, _expression: impl Expressive<AnyMongoType>)

Adds a complex expression to the SELECT clause.

fn add_where_condition(&mut self, condition: impl Into<MongoCondition>)

Adds a condition to the WHERE clause.

fn set_distinct(&mut self, distinct: bool)

Sets whether the query should return distinct results.

fn add_order_by(&mut self, order: impl Into<MongoCondition>, direction: Order)

Adds an ORDER BY clause with direction and optional null handling.

fn add_group_by(&mut self, expression: impl Expressive<AnyMongoType>)

Adds a GROUP BY clause.

fn set_limit(&mut self, limit: Option<i64>, skip: Option<i64>)

Sets LIMIT and OFFSET for result pagination.

fn clear_fields(&mut self)

Removes all fields from the SELECT clause.

fn clear_where_conditions(&mut self)

Removes all WHERE conditions.

fn clear_order_by(&mut self)

Removes all ORDER BY clauses.

fn clear_group_by(&mut self)

Removes all GROUP BY clauses.

fn has_fields(&self) -> bool

Returns true if any fields have been added to SELECT clause.

fn has_where_conditions(&self) -> bool

Returns true if any WHERE conditions have been added.

fn has_order_by(&self) -> bool

Returns true if any ORDER BY clauses have been added.

fn has_group_by(&self) -> bool

Returns true if any GROUP BY clauses have been added.

fn is_distinct(&self) -> bool

Returns true if DISTINCT mode is enabled.

fn get_limit(&self) -> Option<i64>

Returns the current LIMIT value, if set.

fn get_skip(&self) -> Option<i64>

Returns the current OFFSET/SKIP value, if set.

fn as_field(&self, _field: impl Into<String>) -> Expression<AnyMongoType>

Creates a single-field subquery expression from this query configuration.

fn as_count(&self) -> Expression<AnyMongoType>

Creates a COUNT(*) expression from this query configuration.

fn as_sum( &self, column: impl Expressive<AnyMongoType>, ) -> Expression<AnyMongoType>

Creates a SUM(column) expression from this query configuration.

fn as_max( &self, column: impl Expressive<AnyMongoType>, ) -> Expression<AnyMongoType>

Creates a MAX(column) expression from this query configuration.

fn as_min( &self, column: impl Expressive<AnyMongoType>, ) -> Expression<AnyMongoType>

Creates a MIN(column) expression from this query configuration.

fn with_source(self, source: impl Into<SourceRef<T>>) -> Self

where Self: Sized,

Builder pattern method identical to Self::add_source without alias.

fn with_source_as( self, source: impl Into<SourceRef<T>>, alias: impl Into<String>, ) -> Self

where Self: Sized,

Builder pattern method identical to Self::add_source with alias.

fn with_condition(self, condition: impl Into<C>) -> Self

where Self: Sized,

Builder pattern method identical to Self::add_where_condition.

fn with_order(self, order: impl Into<C>, direction: Order) -> Self

where Self: Sized,

Builder pattern method identical to Self::add_order_by.

fn with_field(self, field: impl Into<String>) -> Self

where Self: Sized,

Builder pattern method identical to Self::add_field.

fn with_expression(self, expression: impl Expressive<T>) -> Self

where Self: Sized,

Builder pattern method identical to Self::add_expression.

fn with_group_by(self, expression: impl Expressive<T>) -> Self

where Self: Sized,

Builder pattern method identical to Self::add_group_by.

fn with_distinct(self, distinct: bool) -> Self

where Self: Sized,

Builder pattern method identical to Self::set_distinct.

fn with_limit(self, limit: Option<i64>, skip: Option<i64>) -> Self

where Self: Sized,

Builder pattern method identical to Self::set_limit.

impl SelectableDataSource<AnyMongoType, MongoCondition> for MongoDB

type Select = MongoSelect

fn select(&self) -> Self::Select

fn add_select_column( &self, select: &mut Self::Select, _expression: Expression<AnyMongoType>, alias: Option<&str>, )

Add a column expression to a select query with optional alias. Backends must override this if they support aliases.

async fn execute_select( &self, select: &Self::Select, ) -> Result<Vec<AnyMongoType>>