Drill 25: Key term — Transactions and consistency
Identify the key term in the example and define it.
What you will be able to do
- Identify the key term in the example and define it.
Practice task
Identify the key term in the example and define it.
const session = db.getMongo().startSession()
session.withTransaction(async () => {
const accounts = session.getDatabase("bank").accounts
await accounts.updateOne(
{ _id: "ada" },
{ $inc: { balance: -100 } }
)
await accounts.updateOne(
{ _id: "grace" },
{ $inc: { balance: 100 } }
)
})
session.endSession()
db.accounts.updateOne(
{ _id: "ada" },
{ $inc: { balance: -10 } },
{ writeConcern: { w: "majority" } }
)Your turn
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Identify the key term in the example and define it.
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