问题
I want to use chartkick to create a line graph of records, which belong to a planned task.
In other words: plantask has_many records
Records has two fields I'm interested in graphing. The created_at, which will be my X-axis, and data(An integer), which will be my Y-axis.
So far I've gotten pretty close. By inserting this into my view:
<%= line_chart @plantask.records.group_by_day(:created_at).sum(:data) %>
I can see that my x-axis is displaying perfectly. However, it appears that the y-axis is not loading the records :created_at field, but is loading the :created_at from within the plantask model. (All of my records are mapped to yesterday at 7:00pm) This seems strange to me. Any hints on what I've messed up? Thanks you guys.
回答1:
It turns out that I was approaching this problem the wrong way. Group by day with sum combines every task into one, and adds the value. What I really needed was this:
<%= line_chart @plantask.records.group(:created_at).sum(:data) %>
来源：https://stackoverflow.com/questions/22079683/associations-with-chartkick-rails