Optional
doc: DocTypeOptional
Optional
fields: anyOptional
Optional
options: boolean | AnyObjectOptional
Base Mongoose instance the model uses.
If this is a discriminator model, baseModelName
is the name of
the base model.
Collection the model uses.
Connection the model uses.
Registered discriminators for this model.
Event emitter that reports any errors that occurred. Useful for global error handling.
The name of the model
Schema the model uses.
Adds a $where
clause to this query
Optional
[captureAlias for emitter.on(eventName, listener)
.
Rest
...args: any[]Rest
v0.1.26
Optional
pipeline: PipelineStage[]Optional
Optional
options: mongoose.AggregateOptionsOptional
Sends multiple save()
calls in a single bulkWrite()
. This is faster than
sending multiple save()
calls because with bulkSave()
there is only one
network round trip to the MongoDB server.
Optional
options: BulkWriteOptions & { Optional
Sends multiple insertOne
, updateOne
, updateMany
, replaceOne
,
deleteOne
, and/or deleteMany
operations to the MongoDB server in one
command. This is faster than sending multiple independent operations (e.g.
if you use create()
) because with bulkWrite()
there is only one network
round trip to the MongoDB server.
Optional
options: BulkWriteOptions & MongooseBulkWriteOptionsOptional
Optional
options: { Optional
Optional
ignoreCreates a count
query: counts the number of documents that match filter
.
Optional
filter: FilterQuery<TRawDocType>Optional
Creates a countDocuments
query: counts the number of documents that match filter
.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Creates a new document or documents
Optional
options: CreateOptionsOptional
Rest
...docs: (TRawDocType | DocContents)[]Rest
Create the collection for this model. By default, if no indexes are specified, mongoose will not create the collection for the model until any documents are created. Use this method to create the collection explicitly.
Optional
options: CreateCollectionOptions & Pick<SchemaOptions<unknown, {}, {}, {}, {}, mongoose.Document<unknown, {}, unknown> & Required<{ Optional
Similar to ensureIndexes()
, except for it uses the createIndex
function.
Optional
options: CreateIndexesOptionsOptional
Deletes all of the documents that match conditions
from the collection.
Behaves like remove()
, but deletes all documents that match conditions
regardless of the single
option.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Deletes the first document that matches conditions
from the collection.
Behaves like remove()
, but deletes at most one document regardless of the
single
option.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Does a dry-run of Model.syncIndexes(), meaning that the result of this function would be the result of Model.syncIndexes().
Optional
options: Record<string, unknown>Optional
Adds a discriminator type.
Optional
value: string | number | mongoose.Schema.Types.ObjectId | DiscriminatorOptionsOptional
Optional
value: string | number | mongoose.Schema.Types.ObjectId | DiscriminatorOptionsOptional
Creates a distinct
query: returns the distinct values of the given field
that match filter
.
Optional
filter: FilterQuery<TRawDocType>Optional
Synchronously calls each of the listeners registered for the event namedeventName
, in the order they were registered, passing the supplied arguments
to each.
Returns true
if the event had listeners, false
otherwise.
import EventEmitter from 'node:events';
const myEmitter = new EventEmitter();
// First listener
myEmitter.on('event', function firstListener() {
console.log('Helloooo! first listener');
});
// Second listener
myEmitter.on('event', function secondListener(arg1, arg2) {
console.log(`event with parameters ${arg1}, ${arg2} in second listener`);
});
// Third listener
myEmitter.on('event', function thirdListener(...args) {
const parameters = args.join(', ');
console.log(`event with parameters ${parameters} in third listener`);
});
console.log(myEmitter.listeners('event'));
myEmitter.emit('event', 1, 2, 3, 4, 5);
// Prints:
// [
// [Function: firstListener],
// [Function: secondListener],
// [Function: thirdListener]
// ]
// Helloooo! first listener
// event with parameters 1, 2 in second listener
// event with parameters 1, 2, 3, 4, 5 in third listener
Rest
...args: AnyRestRest
v0.1.26
Sends createIndex
commands to mongo for each index declared in the schema.
The createIndex
commands are sent in series.
Optional
options: CreateIndexesOptionsOptional
Creates a estimatedDocumentCount
query: counts the number of documents in the collection.
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Returns an array listing the events for which the emitter has registered
listeners. The values in the array are strings or Symbol
s.
import EventEmitter from 'node:events';
const myEE = new EventEmitter();
myEE.on('foo', () => {});
myEE.on('bar', () => {});
const sym = Symbol('symbol');
myEE.on(sym, () => {});
console.log(myEE.eventNames());
// Prints: [ 'foo', 'bar', Symbol(symbol) ]
v6.0.0
Returns a document with its _id
if at least one document exists in the database that matches
the given filter
, and null
otherwise.
Creates a find
query: gets a list of documents that match filter
.
Optional
projection: ProjectionType<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Optional
projection: ProjectionType<TRawDocType>Optional
Finds a single document by its _id field. findById(id)
is almost*
equivalent to findOne({ _id: id })
. If you want to query by a document's
_id
, use findById()
instead of findOne()
.
Optional
projection: ProjectionType<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Optional
projection: ProjectionType<TRawDocType>Optional
Creates a findByIdAndDelete
query, filtering by the given _id
.
Optional
id: anyOptional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Creates a findByIdAndRemove
query, filtering by the given _id
.
Optional
id: anyOptional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Creates a findOneAndUpdate
query, filtering by the given _id
.
Optional
id: anyOptional
Optional
update: UpdateQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Finds one document.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
projection: ProjectionType<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
projection: ProjectionType<TRawDocType>Optional
Optional
filter: FilterQuery<TRawDocType>Optional
Creates a findOneAndDelete
query: atomically finds the given document, deletes it, and returns the document as it was before deletion.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType> & { Optional
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Creates a findOneAndRemove
query: atomically finds the given document and deletes it.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Creates a findOneAndReplace
query: atomically finds the given document and replaces it with replacement
.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
replacement: TRawDocType | AnyObjectOptional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Creates a findOneAndUpdate
query: atomically find the first document that matches filter
and apply update
.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
update: UpdateQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Shortcut for creating a new Document from existing raw data, pre-saved in the DB. The document returned has no paths marked as modified initially.
Optional
projection: AnyObjectOptional
Optional
options: { Optional
Optional
setters?: booleanThis function is responsible for building indexes,
unless autoIndex
is turned off.
Mongoose calls this function automatically when a model is created using
mongoose.model()
or
connection.model()
, so you
don't need to call it.
Inserts one or more new documents as a single insertMany
call to the MongoDB server.
Lists the indexes currently defined in MongoDB. This may or may not be
the same as the indexes defined in your schema depending on whether you
use the autoIndex
option and if you
build indexes manually.
Returns a copy of the array of listeners for the event named eventName
.
server.on('connection', (stream) => {
console.log('someone connected!');
});
console.log(util.inspect(server.listeners('connection')));
// Prints: [ [Function] ]
v0.1.26
Alias for emitter.removeListener()
.
Rest
...args: any[]Rest
v10.0.0
Adds the listener
function to the end of the listeners array for the
event named eventName
. No checks are made to see if the listener
has
already been added. Multiple calls passing the same combination of eventName
and listener
will result in the listener
being added, and called, multiple
times.
server.on('connection', (stream) => {
console.log('someone connected!');
});
Returns a reference to the EventEmitter
, so that calls can be chained.
By default, event listeners are invoked in the order they are added. Theemitter.prependListener()
method can be used as an alternative to add the
event listener to the beginning of the listeners array.
const myEE = new EventEmitter();
myEE.on('foo', () => console.log('a'));
myEE.prependListener('foo', () => console.log('b'));
myEE.emit('foo');
// Prints:
// b
// a
The name of the event.
The callback function
Rest
...args: any[]Rest
v0.1.101
Adds a one-timelistener
function for the event named eventName
. The
next time eventName
is triggered, this listener is removed and then invoked.
server.once('connection', (stream) => {
console.log('Ah, we have our first user!');
});
Returns a reference to the EventEmitter
, so that calls can be chained.
By default, event listeners are invoked in the order they are added. Theemitter.prependOnceListener()
method can be used as an alternative to add the
event listener to the beginning of the listeners array.
const myEE = new EventEmitter();
myEE.once('foo', () => console.log('a'));
myEE.prependOnceListener('foo', () => console.log('b'));
myEE.emit('foo');
// Prints:
// b
// a
The name of the event.
The callback function
Rest
...args: any[]Rest
v0.3.0
Populates document references.
Adds the listener
function to the beginning of the listeners array for the
event named eventName
. No checks are made to see if the listener
has
already been added. Multiple calls passing the same combination of eventName
and listener
will result in the listener
being added, and called, multiple
times.
server.prependListener('connection', (stream) => {
console.log('someone connected!');
});
Returns a reference to the EventEmitter
, so that calls can be chained.
The name of the event.
The callback function
Rest
...args: any[]Rest
v6.0.0
Adds a one-timelistener
function for the event named eventName
to the_beginning_ of the listeners array. The next time eventName
is triggered, this
listener is removed, and then invoked.
server.prependOnceListener('connection', (stream) => {
console.log('Ah, we have our first user!');
});
Returns a reference to the EventEmitter
, so that calls can be chained.
The name of the event.
The callback function
Rest
...args: any[]Rest
v6.0.0
Returns a copy of the array of listeners for the event named eventName
,
including any wrappers (such as those created by .once()
).
const emitter = new EventEmitter();
emitter.once('log', () => console.log('log once'));
// Returns a new Array with a function `onceWrapper` which has a property
// `listener` which contains the original listener bound above
const listeners = emitter.rawListeners('log');
const logFnWrapper = listeners[0];
// Logs "log once" to the console and does not unbind the `once` event
logFnWrapper.listener();
// Logs "log once" to the console and removes the listener
logFnWrapper();
emitter.on('log', () => console.log('log persistently'));
// Will return a new Array with a single function bound by `.on()` above
const newListeners = emitter.rawListeners('log');
// Logs "log persistently" twice
newListeners[0]();
emitter.emit('log');
v9.4.0
Removes all listeners, or those of the specified eventName
.
It is bad practice to remove listeners added elsewhere in the code,
particularly when the EventEmitter
instance was created by some other
component or module (e.g. sockets or file streams).
Returns a reference to the EventEmitter
, so that calls can be chained.
Optional
event: string | symbolOptional
v0.1.26
Removes the specified listener
from the listener array for the event namedeventName
.
const callback = (stream) => {
console.log('someone connected!');
};
server.on('connection', callback);
// ...
server.removeListener('connection', callback);
removeListener()
will remove, at most, one instance of a listener from the
listener array. If any single listener has been added multiple times to the
listener array for the specified eventName
, then removeListener()
must be
called multiple times to remove each instance.
Once an event is emitted, all listeners attached to it at the
time of emitting are called in order. This implies that anyremoveListener()
or removeAllListeners()
calls after emitting and_before_ the last listener finishes execution will
not remove them fromemit()
in progress. Subsequent events behave as expected.
const myEmitter = new MyEmitter();
const callbackA = () => {
console.log('A');
myEmitter.removeListener('event', callbackB);
};
const callbackB = () => {
console.log('B');
};
myEmitter.on('event', callbackA);
myEmitter.on('event', callbackB);
// callbackA removes listener callbackB but it will still be called.
// Internal listener array at time of emit [callbackA, callbackB]
myEmitter.emit('event');
// Prints:
// A
// B
// callbackB is now removed.
// Internal listener array [callbackA]
myEmitter.emit('event');
// Prints:
// A
Because listeners are managed using an internal array, calling this will
change the position indices of any listener registered after the listener
being removed. This will not impact the order in which listeners are called,
but it means that any copies of the listener array as returned by
the emitter.listeners()
method will need to be recreated.
When a single function has been added as a handler multiple times for a single
event (as in the example below), removeListener()
will remove the most
recently added instance. In the example the once('ping')
listener is removed:
const ee = new EventEmitter();
function pong() {
console.log('pong');
}
ee.on('ping', pong);
ee.once('ping', pong);
ee.removeListener('ping', pong);
ee.emit('ping');
ee.emit('ping');
Returns a reference to the EventEmitter
, so that calls can be chained.
Rest
...args: any[]Rest
v0.1.26
Creates a replaceOne
query: finds the first document that matches filter
and replaces it with replacement
.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
replacement: TRawDocType | AnyObjectOptional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
By default EventEmitter
s will print a warning if more than 10
listeners are
added for a particular event. This is a useful default that helps finding
memory leaks. The emitter.setMaxListeners()
method allows the limit to be
modified for this specific EventEmitter
instance. The value can be set toInfinity
(or 0
) to indicate an unlimited number of listeners.
Returns a reference to the EventEmitter
, so that calls can be chained.
v0.3.5
Starts a MongoDB session for benefits like causal consistency, retryable writes, and transactions.
Optional
options: mongoose.mongo.ClientSessionOptionsOptional
Makes the indexes in MongoDB match the indexes defined in this model's
schema. This function will drop any indexes that are not defined in
the model's schema except the _id
index, and build any indexes that
are in your schema but not in MongoDB.
Optional
options: SyncIndexesOptionsOptional
Creates a updateMany
query: updates all documents that match filter
with update
.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
update: UpdateWithAggregationPipeline | UpdateQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Creates a updateOne
query: updates the first document that matches filter
with update
.
Optional
filter: FilterQuery<TRawDocType>Optional
Optional
update: UpdateWithAggregationPipeline | UpdateQuery<TRawDocType>Optional
Optional
options: mongoose.QueryOptions<TRawDocType>Optional
Casts and validates the given object against this model's schema, passing the given context
to custom validators.
Optional
pathsWatches the underlying collection for changes using MongoDB change streams.
Optional
pipeline: Record<string, unknown>[]Optional
Optional
options: ChangeStreamOptions & { Optional
Creates a Query, applies the passed conditions, and returns the Query.
Optional
val: anyOptional
Generated using TypeDoc
Models are fancy constructors compiled from
Schema
definitions. An instance of a model is called a document. Models are responsible for creating and reading documents from the underlying MongoDB database