Removing Data from MongoDB
Removing existing data from a MongoDB is accomplished using a Process Task and the Procedure.Mongo Remove element.
In the example above, a Process Task has been defined that includes a Procedure.Mongo Remove element and its attributes have been set to delete any documents in the "Products" collection that include a UnitPrice equal to the value of a @Request token.
The Procedure.Mongo Remove element's attributes include:
| Attribute | Description |
|---|---|
| Connection ID | (Required) Specifies the ID of a Connection.MongoDB element in the application's _Settings definition. |
| ID | (Required) A unique element ID. |
| Mongo Collection | (Required) Specifies the name of the document collection to open. This value is case-sensitive. |
| Mongo Query Document |
Specifies a Mongo "find" document to identify one or more documents. Examples: Find all documents with "type" equal to "snacks". { type: "snacks" } Find all documents with "type" equal to "food" or "snacks" { type: { $in: [ 'food', 'snacks' ] } } To vary the document content based on user or other input, use tokens, such as @Request, inside the document. |
| Mongo Write Concern | Specifies whether the procedure should wait for acknowledgement of the write operation. The default value is Acknowledged, meaning wait for acknowledgement. |
| Multiple Documents | Specifies whether this command should affect multiple documents. The default value is False. |
After a remove procedure runs, you can use the special token @Procedure.myProcMongoRemoveID.DocumentsAffected~ to report the number of documents actually removed by the operation.