Optional authdbOptional bsonfalse
Optional checkthe serializer will check if keys are valid.序列化程序将检查键是否有效。
false
Optional collationCollation排序规则
Optional commentComment to apply to the operation.要应用于操作的注释。
In server versions pre-4.4, 'comment' must be string. 在4.4之前的服务器版本中,“comment”必须是字符串。 A server error will be thrown if any other type is provided.如果提供了任何其他类型,则会引发服务器错误。
In server versions 4.4 and above, 'comment' can be any valid BSON type.在服务器版本4.4及更高版本中,“comment”可以是任何有效的BSON类型。
Optional dbOptional enableEnable utf8 validation when deserializing BSON documents. 在反序列化BSON文档时启用utf8验证。Defaults to true.默认为true。
Optional explainSpecifies the verbosity mode for the explain output.指定解释输出的详细模式。
Optional fieldsallow to specify if there what fields we wish to return as unserialized raw buffer.允许指定我们希望返回哪些字段作为未序列化的原始缓冲区。
null
Optional ignoreserialize will not emit undefined fields note that the driver sets this to 序列化不会发出未定义的字段。请注意,驱动程序将其设置为falsefalse
true
Optional maxOptional noOptional omitOptional promotewhen deserializing a Binary will return it as a node.js Buffer instance.当反序列化Binary时,它将作为node.js Buffer实例返回。
false
Optional promotewhen deserializing a Long will fit it into a Number if it's smaller than 53 bits.当反序列化Long时,如果它小于53位,则将其放入Number中。
true
Optional promotewhen deserializing will promote BSON values to their Node.js closest equivalent types.反序列化时将BSON值提升为其Node.js最接近的等效类型。
true
Optional rawEnabling the raw option will return a Node.js Buffer which is allocated using allocUnsafe API.启用raw选项将返回使用allocUnsafe API分配的Node.js缓冲区。
See this section from the Node.js Docs here for more detail about what "unsafe" refers to in this context.请参阅Node.js文档中的这一部分,了解有关“不安全”在本文中所指内容的更多详细信息。
If you need to maintain your own editable clone of the bytes returned for an extended life time of the process, it is recommended you allocate your own buffer and clone the contents:如果您需要维护自己的可编辑字节克隆,以延长进程的使用寿命,建议您分配自己的缓冲区并克隆内容:
const raw = await collection.findOne({}, { raw: true });
const myBuffer = Buffer.alloc(raw.byteLength);
myBuffer.set(raw, 0);
// Only save and use `myBuffer` beyond this point仅在此点之后保存和使用“myBuffer”
Please note there is a known limitation where this option cannot be used at the MongoClient level (see NODE-3946).请注意,有一个已知的限制,即此选项不能在MongoClient级别使用(请参阅NODE-3946)。
It does correctly work at 它在Db, Collection, and per operation the same as other BSON options work.Db、Collection和每个操作中都能正常工作,与其他BSON选项的工作方式相同。
Optional readSpecify a read concern and level for the collection. 指定集合的读取关注和级别。(only MongoDB 3.2 or higher supported)(仅支持MongoDB 3.2或更高版本)
Optional readThe preferred read preference (ReadPreference.primary, ReadPreference.primary_preferred, ReadPreference.secondary, ReadPreference.secondary_preferred, ReadPreference.nearest).首选读取首选项(ReadPreference.primary、ReadPreference.primary_preferred、ReadPreference.secondary、ReadPreference.secondary_preferred、ReadPreference.nearest)。
Optional retryShould retry failed writes应重试失败的写入
Optional scaleDivide the returned sizes by scale value.将返回的大小除以比例值。
Optional serializeserialize the javascript functions序列化javascript函数
false
Optional sessionSpecify ClientSession for this command为此命令指定ClientSession
Optional usewhen deserializing a Long return as a BigInt.当将Long返回反序列化为BigInt时。
false
Optional willOptional writeWrite Concern as an object将关注作为对象写入
Generated using TypeDoc
return BSON regular expressions as BSONRegExp instances.将BSON正则表达式作为BSONRegExp实例返回。