集合上的方法

db.test.addIdIfNeeded(              db.test.getSplitKeysForChunks(
db.test.aggregate(                  db.test.getWriteConcern(
db.test.bulkWrite(                  db.test.group(
db.test.constructor                 db.test.groupcmd(
db.test.convertToCapped(            db.test.hasOwnProperty
db.test.convertToSingleObject(      db.test.hashAllDocs(
db.test.copyTo(                     db.test.help(
db.test.count(                      db.test.initializeOrderedBulkOp(
db.test.countDocuments(             db.test.initializeUnorderedBulkOp(
db.test.createIndex(                db.test.insert(
db.test.createIndexes(              db.test.insertMany(
db.test.dataSize(                   db.test.insertOne(
db.test.deleteMany(                 db.test.isCapped(
db.test.deleteOne(                  db.test.latencyStats(
db.test.distinct(                   db.test.mapReduce(
db.test.drop(                       db.test.propertyIsEnumerable
db.test.dropIndex(                  db.test.prototype
db.test.dropIndexes(                db.test.reIndex(
db.test.ensureIndex(                db.test.remove(
db.test.estimatedDocumentCount(     db.test.renameCollection(
db.test.exists(                     db.test.replaceOne(
db.test.explain(                    db.test.runCommand(
db.test.find(                       db.test.runReadCommand(
db.test.findAndModify(              db.test.save(
db.test.findOne(                    db.test.setSlaveOk(
db.test.findOneAndDelete(           db.test.setWriteConcern(
db.test.findOneAndReplace(          db.test.shellPrint(
db.test.findOneAndUpdate(           db.test.stats(
db.test.getCollection(              db.test.storageSize(
db.test.getDB(                      db.test.toLocaleString
db.test.getFullName(                db.test.toString(
db.test.getIndexKeys(               db.test.tojson(
db.test.getIndexSpecs(              db.test.totalIndexSize(
db.test.getIndexes(                 db.test.totalSize(
db.test.getIndices(                 db.test.unsetWriteConcern(
db.test.getMongo(                   db.test.update(
db.test.getName(                    db.test.updateMany(
db.test.getPlanCache(               db.test.updateOne(
db.test.getQueryOptions(            db.test.validate(
db.test.getShardDistribution(       db.test.valueOf
db.test.getShardVersion(            db.test.verify(
db.test.getSlaveOk(

集合方法說明

    db.test.find().help() - show DBCursor help
    db.test.bulkWrite( operations, <optional params> ) - bulk execute write operations, optional parameters are: w, wtimeout, j
    db.test.count( query = {}, <optional params> ) - count the number of documents that matches the query, optional parameters are: limit, skip, hint, maxTimeMS
    db.test.countDocuments( query = {}, <optional params> ) - count the number of documents that matches the query, optional parameters are: limit, skip, hint, maxTimeMS
    db.test.estimatedDocumentCount( <optional params> ) - estimate the document count using collection metadata, optional parameters are: maxTimeMS
    db.test.copyTo(newColl) - duplicates collection by copying all documents to newColl; no indexes are copied.
    db.test.convertToCapped(maxBytes) - calls {convertToCapped:'test', size:maxBytes}} command
    db.test.createIndex(keypattern[,options])
    db.test.createIndexes([keypatterns], <options>)
    db.test.dataSize()
    db.test.deleteOne( filter, <optional params> ) - delete first matching document, optional parameters are: w, wtimeout, j
    db.test.deleteMany( filter, <optional params> ) - delete all matching documents, optional parameters are: w, wtimeout, j
    db.test.distinct( key, query, <optional params> ) - e.g. db.test.distinct( 'x' ), optional parameters are: maxTimeMS
    db.test.drop() drop the collection
    db.test.dropIndex(index) - e.g. db.test.dropIndex( "indexName" ) or db.test.dropIndex( { "indexKey" : 1 } )
    db.test.dropIndexes()
    db.test.ensureIndex(keypattern[,options]) - DEPRECATED, use createIndex() instead
    db.test.explain().help() - show explain help
    db.test.reIndex()
    db.test.find([query],[fields]) - query is an optional query filter. fields is optional set of fields to return.
                                                  e.g. db.test.find( {x:77} , {name:1, x:1} )
    db.test.find(...).count()
    db.test.find(...).limit(n)
    db.test.find(...).skip(n)
    db.test.find(...).sort(...)
    db.test.findOne([query], [fields], [options], [readConcern])
    db.test.findOneAndDelete( filter, <optional params> ) - delete first matching document, optional parameters are: projection, sort, maxTimeMS
    db.test.findOneAndReplace( filter, replacement, <optional params> ) - replace first matching document, optional parameters are: projection, sort, maxTimeMS, upsert, returnNewDocument
    db.test.findOneAndUpdate( filter, update, <optional params> ) - update first matching document, optional parameters are: projection, sort, maxTimeMS, upsert, returnNewDocument
    db.test.getDB() get DB object associated with collection
    db.test.getPlanCache() get query plan cache associated with collection
    db.test.getIndexes()
    db.test.group( { key : ..., initial: ..., reduce : ...[, cond: ...] } )
    db.test.insert(obj)
    db.test.insertOne( obj, <optional params> ) - insert a document, optional parameters are: w, wtimeout, j
    db.test.insertMany( [objects], <optional params> ) - insert multiple documents, optional parameters are: w, wtimeout, j
    db.test.mapReduce( mapFunction , reduceFunction , <optional params> )
    db.test.aggregate( [pipeline], <optional params> ) - performs an aggregation on a collection; returns a cursor
    db.test.remove(query)
    db.test.replaceOne( filter, replacement, <optional params> ) - replace the first matching document, optional parameters are: upsert, w, wtimeout, j
    db.test.renameCollection( newName , <dropTarget> ) renames the collection.
    db.test.runCommand( name , <options> ) runs a db command with the given name where the first param is the collection name
    db.test.save(obj)
    db.test.stats({scale: N, indexDetails: true/false, indexDetailsKey: <index key>, indexDetailsName: <index name>})
    db.test.storageSize() - includes free space allocated to this collection
    db.test.totalIndexSize() - size in bytes of all the indexes
    db.test.totalSize() - storage allocated for all data and indexes
    db.test.update( query, object[, upsert_bool, multi_bool] ) - instead of two flags, you can pass an object with fields: upsert, multi
    db.test.updateOne( filter, update, <optional params> ) - update the first matching document, optional parameters are: upsert, w, wtimeout, j
    db.test.updateMany( filter, update, <optional params> ) - update all matching documents, optional parameters are: upsert, w, wtimeout, j
    db.test.validate( <full> ) - SLOW
    db.test.getShardVersion() - only for use with sharding
    db.test.getShardDistribution() - prints statistics about data distribution in the cluster
    db.test.getSplitKeysForChunks( <maxChunkSize> ) - calculates split points over all chunks and returns splitter function
    db.test.getWriteConcern() - returns the write concern used for any operations on this collection, inherited from server/db if set
    db.test.setWriteConcern( <write concern doc> ) - sets the write concern for writes to the collection
    db.test.unsetWriteConcern( <write concern doc> ) - unsets the write concern for writes to the collection
    db.test.latencyStats() - display operation latency histograms for this collection

本文作者：前端首席體驗師(CheongHu)
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