I started getting the following error when trying to insert a new room ** (Ecto.ConstraintError) constraint error when attempting to insert struct: * unique: rooms_pkey If you would like to con...

I want to display a range of dates (statistics) like: Dates | Count -------------------- "2016-09-01" | 0 "2016-09-02" | 0 "2016-09-03" | 0 "2016-09-04" | 0 "2016-09-05" | 0 "2016-09-06" | 12 "201...