mongodb query in array
The $elemMatch operator matches documents that contain an array field with at ... The following query matches only those documents where the results array ... ,Definition¶. $in ¶. New in version 3.4. Returns a boolean indicating whether a specified value is in an array. $in has the following operator expression syntax:.
| 相關軟體 MongoDB 資訊 | |
|---|---|
 mongodb query in array 相關參考資料
$elemMatch (projection) — MongoDB Manual
The $elemMatch operator limits the contents of an <array> field from the query results to contain only the first element matching the $elemMatch condition. https://docs.mongodb.com $elemMatch (query) — MongoDB Manual
The $elemMatch operator matches documents that contain an array field with at ... The following query matches only those documents where the results array ... https://docs.mongodb.com $in (aggregation) — MongoDB Manual
Definition¶. $in ¶. New in version 3.4. Returns a boolean indicating whether a specified value is in an array. $in has the following operator expression syntax:. https://docs.mongodb.com $size — MongoDB Manual
The $size operator matches any array with the number of elements specified by the argument. For example: ... For additional examples in querying arrays, see:. https://docs.mongodb.com Array Query Operators — MongoDB Manual
$all, Matches arrays that contain all elements specified in the query. $elemMatch, Selects documents if element in the array field matches all the specified ... https://docs.mongodb.com Array Update Operators — MongoDB Manual
Acts as a placeholder to update all elements in an array for the documents that match the query condition. $[<identifier>], Acts as a placeholder to update all ... https://docs.mongodb.com mongodb - Find document with array that contains a specific value ...
As favouriteFoods is a simple array of strings, you can just query that field directly: PersonModel.find( favouriteFoods: "sushi" }, ...); But I'd also ... https://stackoverflow.com MongoDB Query operator - MongoDB Documentation
The $in operator selects the documents where the value of a field equals any value in the specified array. To specify an $in expression, use the following ... https://docs.mongodb.com Query an Array of Embedded Documents — MongoDB Manual
This page provides examples of query operations on an array of nested documents using the db.collection.find() method in the mongo shell. The examples on ... https://docs.mongodb.com Query an Array — MongoDB Manual
MongoDB Manual - How to query an array: query on the array field as a whole, check if element in array, query for array element, query if field in array, query by ... https://docs.mongodb.com |