mongodb item in array
$all, Matches arrays that contain all elements specified in the query. $elemMatch, Selects documents if element in the array field matches all the specified ... ,The $ operator projects the first matching array element from each document in a collection based on some condition from the query statement. The $elemMatch ...
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 mongodb item in array 相關參考資料
Find document with array that contains a specific value - Stack ...
There is no $contains operator in mongodb. You can use the answer from JohnnyHK as that works. The closest analogy to contains that mongo ... https://stackoverflow.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 $elemMatch (projection) — MongoDB Manual
The $ operator projects the first matching array element from each document in a collection based on some condition from the query statement. The $elemMatch ... https://docs.mongodb.com $in (aggregation) — MongoDB Manual
The following aggregation operation looks at the in_stock array in each document and determines whether the string bananas is present. copy. copied. https://docs.mongodb.com Array Update Operators — MongoDB Manual
Acts as a placeholder to update the first element that matches the query condition. $[], Acts as a placeholder to update all elements in an array for the documents ... https://docs.mongodb.com $elemMatch (query) — MongoDB Manual
The $elemMatch operator matches documents that contain an array field with at least one element that matches all the specified query criteria. copy. copied. https://docs.mongodb.com $in — MongoDB Manual
If the field holds an array, then the $in operator selects the documents whose field holds an array that contains at least one element that matches a value in the ... https://docs.mongodb.com $arrayElemAt (aggregation) — MongoDB Manual
Returns the element at the specified array index. $arrayElemAt has the following syntax: copy. copied. $arrayElemAt ... 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 Query an Array of Embedded Documents — MongoDB Manual
MongoDB Manual - how to query an array of documents, how to query an array of ... where an element in the instock array matches the specified document:. https://docs.mongodb.com |