NestJS - Database with TypeORM
Which of the following is the correct way to start a transaction using TypeORM's DataSource in NestJS?
Which of the following is the correct way to start a transaction using TypeORM's DataSource in NestJS?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall TypeORM transaction method
TypeORM uses dataSource.transaction with an async callback to run transactional code.Step 2: Check method names
Only dataSource.transaction(async (manager) => { /* operations */ }) uses the correct method name and async callback pattern.Final Answer:
dataSource.transaction(async (manager) => { /* operations */ }) -> Option AQuick Check:
Correct method is transaction with async callback [OK]
Quick Trick: Use dataSource.transaction with async callback [OK]
Common Mistakes:
- Using non-existent methods like startTransaction
- Omitting async keyword in callback
- Using wrong method names like begin or runTransaction
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