将分组的strftime时间转换为整数

时间:2016-03-28 03:09:15

标签: ruby-on-rails ruby highcharts strftime

我有这段代码(我将把它作为高图JS的JSON数据传递)

git push origin HEAD:development

返回:

<%= ItemSale.pluck(:item_id).uniq.map{|item_id| {
name: Item.find(item_id).name, 
data: @item_sales.where(item_id: item_id).group_by_day(:date_sold,
format: "%s").count.to_a}}.to_json %>

但是,我需要这个:

[{"name":"Computer","data":[["1456790400",2],["1456876800",0],["1456963200",1]]},{"name":"Android Phones","data":[["1456876800",3],["1456963200",0],["1457049600",1],["1457136000",0],["1457222400",0],["1457308800",2]]}]

是一个整数并乘以1000,如下所示:

["1457049600",1]

我尝试过做样本数据以确保它是正确的并且正在运行:

[1457049600000,1]

是否有可能或有办法

@item_sales_series = [{"name":"Computer","data":[[1456790400000,2],[1456876800000,0],[1456963200000,1]]},{"name":"Android Phones","data":[[1456876800000,3],[1456963200000,0],[1457049600000,1],[1457136000000,0],[1457222400000,0],[1457308800000,2]]}].to_json

输出整数而不是字符串,并将它乘以1000?

我使用group date gem按日期对数据进行分组。此外,我没有在这个项目中使用Highchart gems,我正在尝试将数据插入图表的不同方法。

1 个答案:

答案 0 :(得分:2)

>> array = [{"name":"Computer","data":[["1456790400",2],["1456876800",0],["1456963200",1]]},{"name":"Android Phones","data":[["1456876800",3],["1456963200",0],["1457049600",1],["1457136000",0],["1457222400",0],["1457308800",2]]}]

>> array.map{|hash| hash.merge(data: hash[:data].map{|str, int| [str.to_i*1000, int]})}
=> [{:name=>"Computer", :data=>[[1456790400000, 2], [1456876800000, 0], [1456963200000, 1]]}, {:name=>"Android Phones", :data=>[[1456876800000, 3], [1456963200000, 0], [1457049600000, 1], [1457136000000, 0], [1457222400000, 0], [1457308800000, 2]]}]

其工作原理如下:

#        ,-- Loop over every element of the top-level array and change it's value
#        |                 ,-- For each hash, change only the element called "data"
#        |                 |                      ,-- In the "data" array, change every element
#        |                 |                      |                   ,-- Change the string to an integer and multiply by 1000
#        |                 |                      |                   |
#        v                 v                      v                   v
>> array.map{|hash| hash.merge(data: hash[:data].map{|str, int| [str.to_i*1000, int]})}