I’m pretty new to Ruby on Rails.
I have multiple datapoints that I am saving in my database for a subject
called “quarterback”. All of those datapoints are added together to for
the value “xoi_qb”. This calculation is performed in my model:
def xoi_qb
sum=0
sum+= passing_yards|| 0
sum+= passing_yards|| 0
sum+= qb_rushing|| 0
Each value will change over time, and so the total of the sum, “xoi_qb”,
will change over time. Currently, the total for “xoi_qb” just updates
and the previous total is lost.
What I’d like to do is save each iteration of that total, every time
it’s changed. I don’t want to do a “cron job”, because I don’t want to
create a time-based schedule that performs a rake to see if any changes
were made…I just want that total for each “quarterback” value “xoi_qb”
to be saved to the database each time that I make a change.
That way, each “quarterback” will end up with many “xoi_qb” values that
go up and down in value. Right now, I just want to solve this and then
eventually I’d like to plot the datapoints in a chart (with Highcharts
or something similar). But for now, I just need to know how to save each
“xoi_qb” total with each change.
I have no idea how to do this.
