How do you find an item in a repository by something other than id

Question

If I have a repository with many properties and I want to find something by the non-id property, do I just find all and then return the data after a boolean comparison, or is there a better way to find by a property that's not the ID?

Answer 1

In loopback4, you need to use repository for this purpose. Do as below.

For case where you know there will be just one entry with value. (Unique columns)

const user = await this.userRepository.findOne({
  where: {
    username: 'test_admin'
  }
});

For case where there can be multiple.

const user = await this.userRepository.find({
  where: {
    firstName: 'test admin'
  }
});