ruby on rails - Is this an efficient way of producing sales reporting / analytics? -

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i have app receive & ingest daily sales reports multiple sources. structured differently store down postgres db in separate tables.

i'm doing iterate on last 30 days sales 1 report source , seems work quite nicely. concern how efficient & scaleable when add additional report sources way have structured means i'd have add , repeat large amounts of code each new source.

<% = date.today - 30 %> #30 days ago <% = date.today %> #today <% step_date = %>   <% source_one_chart_data = [] %> #initialise empty array later pass js chart library  <% begin %>     <% count = @product.sales_source_one.total.where(:report_date => step_date).count %> #check if there sales product on current step date         <% if count != 0 %>             <% sale = @product.sum_total_net_by_day(step_date) %>             <% source_one_chart_data.push(sale.to_s) %> #push sales total array if sales exist on date         <% else %>             <% source_one_chart_data.push("0") %> #otherwise push 0 array 30 days map value         <% end %>      <% step_date += 1.day %> #increase step_date 1 on each iteration of loop <% end while step_date <= %> #stop loop when reach date

can offer guidance on how efficiently bring in additional sales sources without having repeat code? also, if change step day week/month/year , have calculate sales accordingly; if sales source reported daily , step week sum values occur in step week.

why have of code in view? should move of model / controller.

def process_chart_data   = 1.month.ago.to_date   = date.today   step_date =   chart_data = []    while step_date <=     sales_total = sales_source_one.total.where(report_date: step_date).count     if sales_total.zero?       chart_data.push(0)     else       sale = sum_total_net_by_day(step_date)       chart_data.push(sale.to_s)     end     step_date += 1   end    return chart_data end

the above refactored further, if place in product model in controller can do:

@product = product.find(params[:id]) # or whatever @chart_data = @product.process_chart_data

then in view can use @chart_data.

moving code method allows update quicker, lets want user control how far records retrieved:

def process_chart_data(start_date)   = start_date   ... end

in controller:

@product = product.find(params[:id]) @chart_data = @product.process_chart_data(params[:start_date])

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