Question

I have a two relations called Course and School.

Course also has a datetime field open_date.

I want to return all course where the school tier is not 1, and whithin a certain date.

I want some rails code like this:

Course.includes(:school).where("school.tier <> ? AND open_date between ? and ?",1 , date1, date2)

Answer 1

You were almost there:

Course.joins(:schools).where("schools.tier <> ? AND schools.open_date between ? and ?",1 , date1, date2)

The joins clause will eliminate the Courses without School associated.

(if doesn’t work, try with joins(:school))