undefined method `to_f' for #

Question

I\'m trying to build a call tracking app as a way to learn rails and twilio. Right now, what I\'d like to do is to make a graph that shows the number of phone calls a partic

Answer 1

Your total_on method is returning an association, not a number.

Try appending .count:

def total_on(date)
  calls.where("placed_at >= ? AND placed_at <= ?", date.beginning_of_day, date.end_of_day).count
end

You can also give it a date range to shorten the method a bit (effectively the same, but easier to read):

def total_on(date)
  calls.where(placed_at: date.beginning_of_day..date.end_of_day).count
end

Update:

Did the original "placed_at" query ever work, or was it never actually called because of the NoMethodError?

It doesn't look like there is a placed_at column in your model, but I assume you can used created_at just as well.

If you want to used placed_at, you could define this method (I changed the name to placed_on for style):

class Call < ActiveRecord::Base

  def self.placed_on(date)
    where(created_at: date.beginning_of_day..date.end_of_day)
  end

end

You can chain this into your total_on method:

class Phone < ActiveRecord::Base

  def total_on(date)
    calls.placed_on(date).count
  end

end