routier-collection

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routier-collection / plugins/mongodb/src / MongoClientDriverOptions

Type Alias: MongoClientDriverOptions

MongoClientDriverOptions = object

Defined in: plugins/mongodb/src/MongoClientDriver.ts:53

Properties

transactions

readonly transactions: "required" | "unavailable"

Defined in: plugins/mongodb/src/MongoClientDriver.ts:70

Whether this deployment can do transactions.

MongoDB transactions need a replica set. A standalone mongod — what most people run locally — rejects them outright, so this cannot be assumed and must not be discovered on the first multi-collection save.

• "required" opens a session and commits. A deployment that cannot support it fails the save with Mongo's own error, which names the cause.
• "unavailable" runs each save without a session. Writes are applied in order and reported, but a failure part way through leaves the earlier ones in place.

There is no "auto". Detecting it would mean a store silently losing atomicity when it moved from a replica set to a standalone, which is precisely the thing worth knowing about.