Hướng dẫn arrayfilters mongodb
Docs Home → MongoDB Manual Show Bulk.find.arrayFilters( Determines which array elements to modify for an update operation on an array field:
In the update document, use the NoteThe You can include the same identifier multiple times in the update document; however, for each distinct identifier (
However, you can specify compound conditions on the same identifier in a single filter document, such as in the following examples:
Append to
TipSee also:
Docs Home → MongoDB Manual ➤ Use the Select your language drop-down menu in the upper-right to set the language of the following examples. NoteStarting in MongoDB 4.2, MongoDB can accept an aggregation pipeline to specify the modifications to make instead of an update document. See the method reference page for details. All write operations in MongoDB are atomic on the level of a single document. For more information on MongoDB and atomicity, see Atomicity and Transactions. Once set, you cannot update the value of the For write operations, MongoDB preserves the order of the document fields except for the following cases:
With write concerns, you can specify the level of acknowledgement requested from MongoDB for write operations. For details, see Write Concern. |