Multiple series using pluck and chartkick? - ruby-on-rails

Question

I have some data in a table that looks like the following:
date apples pears oranges
1 3 2 0
2 1 5 0
3 0 2 1
4 0 0 1
5 0 1 1
I can plot the count of a fruit by date using:
<%= line_chart FruitCount.pluck(:date, :apples), xtitle: "Date", ytitle: "Count" %>
I can't workout how to plot apples, pears and oranges onto the same plot. I thought it might be something like the following:
<%= line_chart [
{ name: Apples, data: FruitCount.pluck(:date, :apples) },
{ name: Pears, data: FruitCount.pluck(:date, :pears) }
{ name: Oranges, data: FruitCount.pluck(:date, :oranges) }
], xtitle: "Date", ytitle: "Count" %>
All help greatly appreciated.
Edit:
The issue was a missed comma and the names not being strings. The code below works:
<%= line_chart [
{ name: "Apples", data: FruitCount.pluck(:date, :apples) },
{ name: "Pears", data: FruitCount.pluck(:date, :pears) },
{ name: "Oranges", data: FruitCount.pluck(:date, :oranges) },
], xtitle: "Date", ytitle: "Count" %>

Answer 1

I have a line chart showing items that are "expiring" on a given date grouped by month using line_chart. I like the built-in feature of clicking on the color keys to show/hide each line. I use a complicated query to get info in this format:
{["Footwear", Sat, 01 May 2021]=>0,
["Footwear", Tue, 01 Jun 2021]=>1,
["Footwear", Thu, 01 Jul 2021]=>0,
...
["Coat", Sun, 01 Aug 2021]=>0,
["Coat", Wed, 01 Sep 2021]=>0,
["Coat", Fri, 01 Oct 2021]=>0,
["Coat", Mon, 01 Nov 2021]=>0,
...
["Helmet", Wed, 01 Dec 2021]=>0,
["Helmet", Sat, 01 Jan 2022]=>0,
["Helmet", Tue, 01 Feb 2022]=>1,
["Helmet", Tue, 01 Mar 2022]=>2,
["Helmet", Fri, 01 Apr 2022]=>0...}
So just hand line_chart a hash with data like: ["Apple", <date>] => count] and chartkick will do the rest. I have a very limited view of your table structures but going on what you have given us I think you could do:
hash_for_chart = {}
FruitCount.pluck(:date, :apples, :pears, :oranges).each do |arr|
hash_for_chart['Apples', arr[0]] = arr[1]
hash_for_chart['Pears', arr[0]] = arr[2]
hash_for_chart['Oranges', arr[0]] = arr[3]
end
Here we are grabbing every FruitCount record, plucking the date and the three counts so we have an array of those values. Then we add a hash pair for each of the three values on that date to a hash that we will pass to line_chart
line_chart hash_for_chart
There may be a more complex AR query that could give you the same data but hard for me to say with such limited info about your DB.