Can you explain the distinctions between QueryBuilder, find, and findOne in TypeORM?

In my typeorm query, I initially used the query builder like this:

getManager().CreateQueryBuilder(class_name_from_entity_file, 'xyz').select('column_name').where('active_status=1').execute()

While this method gave me the desired output, I was advised to use 'find' instead. So I updated my query to:

getManager().find(class_name_from_entity_file,
{
  select:['column_name'],
  where: {
          active_status: 1
          }
} 

Surprisingly, both of these queries are producing the same result. Can you explain the difference between query builder and find? Also, could you please provide information on using findone as well?

Answer №1

Personally, I believe that createQueryBuilder offers more control over data output compared to find or findOne. By using leftJoin, we can effectively handle relations without having to pass them into the find method. Additionally, createQueryBuilder allows us to implement groupBy functionality, which is not available with the find method.

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