$pull $pull操作符会从现有数组中删除符合指定条件的一个或多个值的所有实例。 兼容性 可以使用$pull查找托管在以下环境中的部署: MongoDB Atlas:用于云中 MongoDB 部署的完全托管服务 MongoDB Enterprise:基于订阅、自我管理的 MongoDB 版本 MongoDB Community:源代码可用、免费使用且可自行管理的 MongoDB 版本 ...
$pull: {ARR_KEY: ELEMENT}。 $push: 向数组末尾推入元素,键不存在则先创建为空数组。$push: {ARR_KEY: ELEMENT|PUSH_EACH_DOC <, ...>}。只能用于数组类型的键。PUSH_EACH_DOC可使用以下子操作符: $each: 推入多个元素。$each: [ELEMENT <, ...>]。 $slice:推入元素按需排序后,保留多少个元素...
Use update operators to modify MongoDB documents. You can set field values, manipulate arrays, and more.
modifier description $each appends multiple values to the array field. $slice limits the number of array elements. requires the use of the $each modifier. $sort orders elements of the array. requires the use of the $each modifier. $position specifies the location in the array at which to ...
问Mongodb update查询返回'Cannot apply $pull to a non-array value‘EN出现此错误的原因是，当select...
Operation ID: InsertMultipleDocuments You can add more than one document at a time by using the insertMany endpoint. In that case, you must use the documents property in the body of the request to specify the array of documents you want to insert into the collection. Parameters Rozbaliť ...
"$in" can be used to query for a variety of values for a single key. "$or" is more general; it can be used to query for any of the given values across multiple keys. If you have more than one possible value to match for a single key, use an array of criteria with "$in". ...
类似地,PHP的驱动把最后的两个参数合并到了一个数组中:array('upsert' => false, 'multiple' => false)。 \clearpage 第三章 - 掌握查找 第一章对find命令作了一些简单的介绍,除了选择器以外,find还有很多其他的特性。之前有提到过find返回的结果是一个游标。现在就将对这点做深入的讨论。 域的选择 在...
hostsArrayContains all hosts and ports for replica set[{ host: 'localhost', port: 27017 }] extraOptionsObjectExtra options passed to the node driver as part ofdriverOptions{} connectionTypeStringThe desired connection type. Possible values:NODE_DRIVER,STITCH_ON_PREM,STITCH_ATLASNODE_DRIVER ...
$in: member of.valuemust be an array of values $ne,$nin: not equal, not a member of $exists: checks whether the document posses the propertyfield.valueshould be true or false $regex: checks whether a string is matched by the regular expression. Contrary to MongoDB, the use of$optionswi...