How can I perform advanced queries using TypeORM in Node.js?

How can I perform advanced queries using TypeORM in Node.js?

You can use TypeORM's QueryBuilder for advanced queries. It allows you to build complex SQL queries programmatically.

Can you give me an example of using QueryBuilder for a join query?

Sure! Here's a simple example: const users = await getRepository(User) .createQueryBuilder('user') .leftJoinAndSelect('user.profile', 'profile') .where('user.age > :age', { age: 18 }) .getMany(); This fetches users older than 18 along with their profiles.

What if I want to filter results based on multiple conditions?

You can chain multiple where conditions. For example: .where('user.age > :age', { age: 18 }) .andWhere('profile.isActive = :isActive', { isActive: true }).

How do I handle pagination with TypeORM?

You can use the skip and take methods in your query. For example: .skip(10).take(5) will skip the first 10 results and take the next 5.