Find all records which have a count of an association greater than zero

Question

I\'m trying to do something that I thought it would be simple but it seems not to be.

I have a project model that has many vacancies.

class Project &         


        

Answer 1

The error is telling you that vacancies is not a column in projects, basically.

This should work

Project.joins(:vacancies).where('COUNT(vacancies.project_id) > 0')