MongoCollection Structure Reference


                    
                    
                    namespace

The namespace for this collection.

Declaration

Swift

public let namespace: MongoNamespace

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                    encoder

Encoder used by this collection for BSON conversions. (e.g. converting CollectionTypes, indexes, and options to documents).

Declaration

Swift

public let encoder: BSONEncoder

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                    decoder

Decoder used by this collection for BSON conversions (e.g. converting documents to CollectionTypes).

Declaration

Swift

public let decoder: BSONDecoder

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                    eventLoop

The EventLoop this MongoCollection is bound to.

Declaration

Swift

public let eventLoop: EventLoop?

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                    CollectionType

A Codable type associated with this MongoCollection instance. This allows CollectionType values to be directly inserted into and retrieved from the collection, by encoding/decoding them using the BSONEncoder and BSONDecoder. The strategies to be used by the encoder and decoder for certain types can be configured by setting the coding strategies on the options used to create this collection instance. The default strategies are inherited from those set on the database this collection derived from.

This type association only exists in the context of this particular MongoCollection instance. It is the responsibility of the user to ensure that any data already stored in the collection was encoded from this same type and according to the coding strategies set on this instance.

Declaration

Swift

public typealias CollectionType = T

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                    name

The name of this collection.

Declaration

Swift

public var name: String { get }

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                    readConcern

The ReadConcern set on this collection, or nil if one is not set.

Declaration

Swift

public let readConcern: ReadConcern?

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                    readPreference

The ReadPreference set on this collection.

Declaration

Swift

public let readPreference: ReadPreference

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                    writeConcern

The WriteConcern set on this collection, or nil if one is not set.

Declaration

Swift

public let writeConcern: WriteConcern?

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                    drop(options:session:)

Drops this collection from its parent database.

Declaration

Swift

public func drop(options: DropCollectionOptions? = nil, session: ClientSession? = nil) -> EventLoopFuture<Void>

Return Value

An EventLoopFuture<Void> that succeeds when the drop is successful.

If the future fails, the error is likely one of the following:

MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.

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                    renamed(to:options:session:)

Renames this collection on the server. This method will return a handle to the renamed collection. The handle which this method is invoked on will continue to refer to the old collection, which will then be empty. The server will throw an error if the new name matches an existing collection unless the dropTarget option is set to true.

Note: This method is not supported on sharded collections.

Declaration

Swift

public func renamed(
    to newName: String,
    options: RenameCollectionOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<MongoCollection>

Parameters

`to`	A `String`, the new name for the collection
`options`	Optional `RenameCollectionOptions` to use for the collection
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<MongoCollection> evaluating to a copy of the target MongoCollection with the new name.

If the future evaluates to an error, it is likely one of the following:

MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    bulkWrite(_:options:session:)

Execute multiple write operations.

Declaration

Swift

public func bulkWrite(
    _ requests: [WriteModel<T>],
    options: BulkWriteOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<BulkWriteResult?>

Parameters

`requests`	a `[WriteModel]` containing the writes to perform.
`options`	optional `BulkWriteOptions` to use while executing the operation.
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<BulkWriteResult?>. On success, the future contains either a BulkWriteResult, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if requests is empty.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
MongoError.BulkWriteError if any error occurs while performing the writes. This includes errors that would typically be propagated as RuntimeErrors or MongoError.CommandErrors elsewhere.
EncodingError if an error occurs while encoding the CollectionType or the options to BSON.

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                    watch(_:options:session:)

Starts a ChangeStream on this collection. The CollectionType will be associated with the fullDocument field in ChangeStreamEvents emitted by the returned ChangeStream. The server will return an error if this method is called on a system collection.

Warning

If the returned change stream is alive when it goes out of scope, it will leak resources. To ensure the change stream is dead before it leaves scope, invoke ChangeStream.kill(...) on it.

Declaration

Swift

public func watch(
    _ pipeline: [BSONDocument] = [],
    options: ChangeStreamOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<ChangeStream<ChangeStreamEvent<CollectionType>>>

Parameters

`pipeline`	An array of aggregation pipeline stages to apply to the events returned by the change stream.
`options`	An optional `ChangeStreamOptions` to use when constructing the change stream.
`session`	An optional `ClientSession` to use with this change stream.

Return Value

An EventLoopFuture<ChangeStream>. On success, contains a ChangeStream watching this collection.

If the future fails, the error is likely one of the following:

MongoError.CommandError if an error occurs on the server while creating the change stream.
MongoError.InvalidArgumentError if the options passed formed an invalid combination.
MongoError.InvalidArgumentError if the _id field is projected out of the change stream documents by the pipeline.

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                    watch(_:options:session:withFullDocumentType:)

Starts a ChangeStream on this collection. Associates the specified Codable type T with the fullDocument field in the ChangeStreamEvents emitted by the returned ChangeStream. The server will return an error if this method is called on a system collection.

Warning

If the returned change stream is alive when it goes out of scope, it will leak resources. To ensure the change stream is dead before it leaves scope, invoke ChangeStream.kill(...) on it.

Declaration

Swift

public func watch<FullDocType: Codable>(
    _ pipeline: [BSONDocument] = [],
    options: ChangeStreamOptions? = nil,
    session: ClientSession? = nil,
    withFullDocumentType _: FullDocType.Type
) -> EventLoopFuture<ChangeStream<ChangeStreamEvent<FullDocType>>>

Parameters

`pipeline`	An array of aggregation pipeline stages to apply to the events returned by the change stream.
`options`	An optional `ChangeStreamOptions` to use when constructing the change stream.
`session`	An optional `ClientSession` to use with this change stream.
`withFullDocumentType`	The type that the `fullDocument` field of the emitted `ChangeStreamEvent`s will be decoded to.

Return Value

An EventLoopFuture<ChangeStream>. On success, contains a ChangeStream watching this collection.

If the future fails, the error is likely one of the following:

MongoError.CommandError if an error occurs on the server while creating the change stream.
MongoError.InvalidArgumentError if the options passed formed an invalid combination.
MongoError.InvalidArgumentError if the _id field is projected out of the change stream documents by the pipeline.

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                    watch(_:options:session:withEventType:)

Starts a ChangeStream on this collection. Associates the specified Codable type T with the returned ChangeStream. The server will return an error if this method is called on a system collection.

Warning

If the returned change stream is alive when it goes out of scope, it will leak resources. To ensure the change stream is dead before it leaves scope, invoke ChangeStream.kill(...) on it.

Declaration

Swift

public func watch<EventType: Codable>(
    _ pipeline: [BSONDocument] = [],
    options: ChangeStreamOptions? = nil,
    session: ClientSession? = nil,
    withEventType _: EventType.Type
) -> EventLoopFuture<ChangeStream<EventType>>

Parameters

`pipeline`	An array of aggregation pipeline stages to apply to the events returned by the change stream.
`options`	An optional `ChangeStreamOptions` to use when constructing the change stream.
`session`	An optional `ClientSession` to use with this change stream.
`withEventType`	The type that the entire change stream response will be decoded to and that will be returned when iterating through the change stream.

Return Value

An EventLoopFuture<ChangeStream>. On success, contains a ChangeStream watching this collection.

If the future fails, the error is likely one of the following:

MongoError.CommandError if an error occurs on the server while creating the change stream.
MongoError.InvalidArgumentError if the options passed formed an invalid combination.
MongoError.InvalidArgumentError if the _id field is projected out of the change stream documents by the pipeline.

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                    findOneAndDelete(_:options:session:)

Finds a single document and deletes it, returning the original.

Declaration

Swift

public func findOneAndDelete(
    _ filter: BSONDocument,
    options: FindOneAndDeleteOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<CollectionType?>

Parameters

`filter`	`BSONDocument` representing the match criteria
`options`	Optional `FindOneAndDeleteOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<CollectionType?>. On success, contains either the deleted document, represented as a CollectionType, or contains nil if no document was deleted.

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if any of the provided options are invalid.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.WriteError if an error occurs while executing the command.
DecodingError if the deleted document cannot be decoded to a CollectionType value.

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                    findOneAndReplace(filter:replacement:options:session:)

Finds a single document and replaces it, returning either the original or the replaced document.

Declaration

Swift

public func findOneAndReplace(
    filter: BSONDocument,
    replacement: CollectionType,
    options: FindOneAndReplaceOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<CollectionType?>

Parameters

`filter`	`BSONDocument` representing the match criteria
`replacement`	a `CollectionType` to replace the found document
`options`	Optional `FindOneAndReplaceOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<CollectionType?>. On success, contains a CollectionType, representing either the original document or its replacement, depending on selected options; or containing nil if there was no matching document.

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if any of the provided options are invalid.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.WriteError if an error occurs while executing the command.
DecodingError if the replaced document cannot be decoded to a CollectionType value.
EncodingError if replacement cannot be encoded to a BSONDocument.

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                    findOneAndUpdate(filter:update:options:session:)

Finds a single document and updates it, returning either the original or the updated document.

Declaration

Swift

public func findOneAndUpdate(
    filter: BSONDocument,
    update: BSONDocument,
    options: FindOneAndUpdateOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<CollectionType?>

Parameters

`filter`	`BSONDocument` representing the match criteria
`update`	a `BSONDocument` containing updates to apply
`options`	Optional `FindOneAndUpdateOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<CollectionType>. On success, contains either the original or updated document, depending on selected options, or contains nil if there was no match.

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if any of the provided options are invalid.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.WriteError if an error occurs while executing the command.
DecodingError if the updated document cannot be decoded to a CollectionType value.

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                    createIndex(_:indexOptions:options:session:)

Creates an index over the collection for the provided keys with the provided options.

Declaration

Swift

public func createIndex(
    _ keys: BSONDocument,
    indexOptions: IndexOptions? = nil,
    options: CreateIndexOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<String>

Parameters

`keys`	a `BSONDocument` specifing the keys for the index
`indexOptions`	Optional `IndexOptions` to use for the index
`options`	Optional `CreateIndexOptions` to use for the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<String>. On success, contains the name of the created index.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the write.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the index specification or options.

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                    createIndex(_:options:session:)

Creates an index over the collection for the provided keys with the provided options.

Declaration

Swift

public func createIndex(
    _ model: IndexModel,
    options: CreateIndexOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<String>

Parameters

`model`	An `IndexModel` representing the keys and options for the index
`options`	Optional `CreateIndexOptions` to use for the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<String>. On success, contains the name of the created index.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the write.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the index specification or options.

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                    createIndexes(_:options:session:)

Creates multiple indexes in the collection.

Declaration

Swift

public func createIndexes(
    _ models: [IndexModel],
    options: CreateIndexOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<[String]>

Parameters

`models`	An `[IndexModel]` specifying the indexes to create
`options`	Optional `CreateIndexOptions` to use for the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<[String]>. On success, contains the names of the created indexes.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the write.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if models is empty.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the index specifications or options.

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                    dropIndex(_:options:session:)

Drops a single index from the collection by the index name.

Declaration

Swift

public func dropIndex(
    _ name: String,
    options: DropIndexOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<Void>

Parameters

`name`	The name of the index to drop
`options`	Optional `DropIndexOptions` to use for the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<Void> that succeeds when the drop is successful.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
EncodingError if an error occurs while encoding the options.

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                    dropIndex(_:options:session:)

Attempts to drop a single index from the collection given the keys describing it.

Declaration

Swift

public func dropIndex(
    _ keys: BSONDocument,
    options: DropIndexOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<Void>

Parameters

`keys`	a `BSONDocument` containing the keys for the index to drop
`options`	Optional `DropIndexOptions` to use for the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<Void> that succeeds when the drop is successful.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options.

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                    dropIndex(_:options:session:)

Attempts to drop a single index from the collection given an IndexModel describing it.

Declaration

Swift

public func dropIndex(
    _ model: IndexModel,
    options: DropIndexOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<Void>

Parameters

`model`	An `IndexModel` describing the index to drop
`options`	Optional `DropIndexOptions` to use for the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<Void> that succeeds when the drop is successful.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options.

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                    dropIndexes(options:session:)

Drops all indexes in the collection.

Declaration

Swift

public func dropIndexes(
    options: DropIndexOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<Void>

Parameters

`options`	Optional `DropIndexOptions` to use for the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<Void> that succeeds when the drop is successful.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options.

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                    listIndexes(session:)

Retrieves a list of the indexes currently on this collection.

Warning

If the returned cursor is alive when it goes out of scope, it will leak resources. To ensure the cursor is dead before it leaves scope, invoke MongoCursor.kill(...) on it.

Declaration

Swift

public func listIndexes(session: ClientSession? = nil) -> EventLoopFuture<MongoCursor<IndexModel>>

Parameters


                                session

Optional ClientSession to use when executing this command

Return Value

An EventLoopFuture<MongoCursor<IndexModel>>. On success, contains a cursor over the indexes.

If the future fails, the error is likely one of the following:

MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.

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                    listIndexNames(session:)

Retrieves a list of names of the indexes currently on this collection.

Declaration

Swift

public func listIndexNames(session: ClientSession? = nil) -> EventLoopFuture<[String]>

Parameters


                                session

Optional ClientSession to use when executing this command

Return Value

An EventLoopFuture<[String]> containing the index names.

If the future fails, the error is likely one of the following:

MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.

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                    find(_:options:session:)

Finds the documents in this collection which match the provided filter.

Warning

If the returned cursor is alive when it goes out of scope, it will leak resources. To ensure the cursor is dead before it leaves scope, invoke MongoCursor.kill(...) on it.

Declaration

Swift

public func find(
    _ filter: BSONDocument = [:],
    options: FindOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<MongoCursor<CollectionType>>

Parameters

`filter`	A `BSONDocument` that should match the query
`options`	Optional `FindOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<MongoCursor<CollectionType>. On success, contains a cursor over the resulting documents.

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if the options passed are an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    findOne(_:options:session:)

Finds a single document in this collection that matches the provided filter.

Declaration

Swift

public func findOne(
    _ filter: BSONDocument = [:],
    options: FindOneOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<T?>

Parameters

`filter`	A `BSONDocument` that should match the query
`options`	Optional `FindOneOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<CollectionType?>. On success, contains the matching document, or nil if there was no match.

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if the options passed are an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    aggregate(_:options:session:)

Runs an aggregation framework pipeline against this collection.

Warning

If the returned cursor is alive when it goes out of scope, it will leak resources. To ensure the cursor is dead before it leaves scope, invoke MongoCursor.kill(...) on it.

Declaration

Swift

public func aggregate(
    _ pipeline: [BSONDocument],
    options: AggregateOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<MongoCursor<BSONDocument>>

Parameters

`pipeline`	an `[BSONDocument]` containing the pipeline of aggregation operations to perform
`options`	Optional `AggregateOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<MongoCursor<CollectionType>. On success, contains a cursor over the resulting documents.

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if the options passed are an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    aggregate(_:options:session:withOutputType:)

Runs an aggregation framework pipeline against this collection. Associates the specified Codable type OutputType with the returned MongoCursor

Warning

If the returned cursor is alive when it goes out of scope, it will leak resources. To ensure the cursor is dead before it leaves scope, invoke MongoCursor.kill(...) on it.

Declaration

Swift

public func aggregate<OutputType: Codable>(
    _ pipeline: [BSONDocument],
    options: AggregateOptions? = nil,
    session: ClientSession? = nil,
    withOutputType _: OutputType.Type
) -> EventLoopFuture<MongoCursor<OutputType>>

Parameters

`pipeline`	an `[BSONDocument]` containing the pipeline of aggregation operations to perform
`options`	Optional `AggregateOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command
`withOutputType`	the type that each resulting document of the output of the aggregation operation will be decoded to

Return Value

An EventLoopFuture<MongoCursor>over the resulting OutputTypes

If the future fails, the error is likely one of the following:

MongoError.InvalidArgumentError if the options passed are an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    countDocuments(_:options:session:)

Counts the number of documents in this collection matching the provided filter. Note that an empty filter will force a scan of the entire collection. For a fast count of the total documents in a collection see estimatedDocumentCount.

Declaration

Swift

public func countDocuments(
    _ filter: BSONDocument = [:],
    options: CountDocumentsOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<Int>

Parameters

`filter`	a `BSONDocument`, the filter that documents must match in order to be counted
`options`	Optional `CountDocumentsOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<Int>. On success, contains the count of the documents that matched the filter.

If the future fails, the error is likely one of the following:

MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    estimatedDocumentCount(options:)

Gets an estimate of the count of documents in this collection using collection metadata. This operation cannot be used in a transaction.

Declaration

Swift

public func estimatedDocumentCount(options: EstimatedDocumentCountOptions? = nil) -> EventLoopFuture<Int>

Parameters


                                options

Optional EstimatedDocumentCountOptions to use when executing the command

Return Value

An EventLoopFuture<Int>. On success, contains an estimate of the count of documents in this collection.

If the future fails, the error is likely one of the following:

MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    distinct(fieldName:filter:options:session:)

Finds the distinct values for a specified field across the collection.

Declaration

Swift

public func distinct(
    fieldName: String,
    filter: BSONDocument = [:],
    options: DistinctOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<[BSON]>

Parameters

`fieldName`	The field for which the distinct values will be found
`filter`	a `BSONDocument` representing the filter documents must match in order to be considered for the operation
`options`	Optional `DistinctOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<[BSON]>. On success, contains the distinct values for the specified criteria.

If the future fails, the error is likely one of the following:

MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    insertOne(_:options:session:)

Encodes the provided value to BSON and inserts it. If the value is missing an identifier, one will be generated for it.

Declaration

Swift

public func insertOne(
    _ value: CollectionType,
    options: InsertOneOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<InsertOneResult?>

Parameters

`value`	A `CollectionType` value to encode and insert
`options`	Optional `InsertOneOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<InsertOneResult?>. On success, contains the result of performing the insert, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the CollectionType to BSON.

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                    insertMany(_:options:session:)

Encodes the provided values to BSON and inserts them. If any values are missing identifiers, the driver will generate them.

Declaration

Swift

public func insertMany(
    _ values: [CollectionType],
    options: InsertManyOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<InsertManyResult?>

Parameters

`values`	The `CollectionType` values to insert
`options`	optional `InsertManyOptions` to use while executing the operation
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<InsertManyResult?>. On success, contains the result of performing the inserts, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.BulkWriteError if an error occurs while performing any of the writes.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the CollectionType or options to BSON.

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                    replaceOne(filter:replacement:options:session:)

Replaces a single document matching the provided filter in this collection.

Declaration

Swift

public func replaceOne(
    filter: BSONDocument,
    replacement: CollectionType,
    options: ReplaceOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<UpdateResult?>

Parameters

`filter`	A `BSONDocument` representing the match criteria
`replacement`	The replacement value, a `CollectionType` value to be encoded and inserted
`options`	Optional `ReplaceOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<UpdateResult?>. On success, contains the result of performing the replacement, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the CollectionType or options to BSON.

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                    updateOne(filter:update:options:session:)

Updates a single document matching the provided filter in this collection.

Declaration

Swift

public func updateOne(
    filter: BSONDocument,
    update: BSONDocument,
    options: UpdateOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<UpdateResult?>

Parameters

`filter`	A `BSONDocument` representing the match criteria
`update`	A `BSONDocument` representing the update to be applied to a matching document
`options`	Optional `UpdateOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<UpdateResult?>. On success, contains the result of performing the update, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    updateMany(filter:update:options:session:)

Updates multiple documents matching the provided filter in this collection.

Declaration

Swift

public func updateMany(
    filter: BSONDocument,
    update: BSONDocument,
    options: UpdateOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<UpdateResult?>

Parameters

`filter`	A `BSONDocument` representing the match criteria
`update`	A `BSONDocument` representing the update to be applied to matching documents
`options`	Optional `UpdateOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<UpdateResult?>. On success, contains the result of performing the update, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    deleteOne(_:options:session:)

Deletes a single matching document from the collection.

Declaration

Swift

public func deleteOne(
    _ filter: BSONDocument,
    options: DeleteOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<DeleteResult?>

Parameters

`filter`	A `BSONDocument` representing the match criteria
`options`	Optional `DeleteOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<DeleteResult?>. On success, contains the result of performing the deletion, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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                    deleteMany(_:options:session:)

Deletes all matching documents from the collection.

Declaration

Swift

public func deleteMany(
    _ filter: BSONDocument,
    options: DeleteOptions? = nil,
    session: ClientSession? = nil
) -> EventLoopFuture<DeleteResult?>

Parameters

`filter`	Document representing the match criteria
`options`	Optional `DeleteOptions` to use when executing the command
`session`	Optional `ClientSession` to use when executing this command

Return Value

An EventLoopFuture<DeleteResult?>. On success, contains the result of performing the deletions, or contains nil if the write concern is unacknowledged.

If the future fails, the error is likely one of the following:

MongoError.WriteError if an error occurs while performing the command.
MongoError.CommandError if an error occurs that prevents the command from executing.
MongoError.InvalidArgumentError if the options passed in form an invalid combination.
MongoError.LogicError if the provided session is inactive.
MongoError.LogicError if this collection’s parent client has already been closed.
EncodingError if an error occurs while encoding the options to BSON.

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