# MongoDB Collection

## Manager Parameters

| Parameter           | Definition                                                                                                                                        | Example                     | Default                   |
| ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------- | ------------------------- |
| system              | Name of the [system ](/devops/microservices/building-blocks/systems-integrations.md#mongodb)which defines MongoDB service details (uri, database) | {uri:"mongodb://127.0.0.1"} | master.mongo.uri/database |
| collection          | Name of the MongoDB collection to store details                                                                                                   | product                     | \[state manager alias]    |
| journalCollection   | Name of the MongoDB collection to store state changes                                                                                             | product\_journal            | -                         |
| keepJournal         | Alternative to journalCollection parameter, automatically using "draft\_journal" suffix for the journal collection                                | true                        | false                     |
| bypassDocValidation | Whether MongoDB should bypass document validation during updates                                                                                  | true                        | false                     |

This state manager supports [CallSP](broken://pages/0a3jLM4TdCuK7kEQqgi2) action of write event handler, where command can be either of deleteOne, deleteMany, updateOne or updateMany and input contents can include following fields:

* **filter:** Filter to pass for deleting or updating records (e.g. {"data.status": "D"})
* **update:** Update contents to pass for updating records (e.g. {"$set": {"data.status": "A"}})
* **options:** Delete or update options to pass (e.g. {"upsert": true})


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