Ruby on rails 如何在Ruby中对JSON对象的嵌套数组进行排序?

Ruby on rails 如何在Ruby中对JSON对象的嵌套数组进行排序?,ruby-on-rails,json,ruby,Ruby On Rails,Json,Ruby,早上好!我在Rails中有一个棘手的数据集要处理。它是一个JSON对象数组,每个对象有4个属性。示例如下: [ [ { "column_name": "ID", "column_id": "item_attributes#id", "column_value": "25295119-7113-42fe-90d5-394c7a841b31", "column_type": "st

早上好!我在Rails中有一个棘手的数据集要处理。它是一个JSON对象数组,每个对象有4个属性。示例如下:

[
    [
        {
            "column_name": "ID",
            "column_id": "item_attributes#id",
            "column_value": "25295119-7113-42fe-90d5-394c7a841b31",
            "column_type": "string"
        },
        {
            "column_name": "Name",
            "column_id": "item_attributes#name",
            "column_value": "Webform submission",
            "column_type": "string"
        },
        {
            "column_name": "Current owner",
            "column_id": "item_attributes#current_owner",
            "column_value": "Joe Bloggs",
            "column_type": "string"
        },
        {
            "column_name": "State",
            "column_id": "item_attributes#state",
            "column_value": "New Task",
            "column_type": "string"
        },
        {
            "column_name": "Status",
            "column_id": "item_attributes#status",
            "column_value": "In progress",
            "column_type": "string"
        },
        {
            "column_name": "Created at",
            "column_id": "item_attributes#created_at",
            "column_value": "07/09/2018, 10:47 am",
            "column_type": "datetime"
        },
        {
            "column_name": "Updated at",
            "column_id": "item_attributes#updated_at",
            "column_value": "07/09/2018, 10:47 am",
            "column_type": "datetime"
        },
        {
            "column_name": "Task reviewer",
            "column_id": "item_participant_attributes#90a76abe-028f-45bc-8390-433bc39ba02e",
            "column_value": "Jane Bloggs",
            "column_type": "string"
        },
        {
            "column_name": "Task owner",
            "column_id": "item_participant_attributes#5bce3a02-07bf-4353-9f3d-2cc60f787584",
            "column_value": "Jack blogs",
            "column_type": "string"
        },
        {
            "column_name": "Make a list of your weekly tasks. Update status of this object to complete when it's complete.",
            "column_id": "element_attributes#533e26d8-c313-4d94-ab99-37263b0aa4ee",
            "column_value": null,
            "column_type": "string"
        },
        {
            "column_name": "Set target end date (choose Friday for end of this week)",
            "column_id": "element_attributes#6eeddd67-e1de-40c3-b220-197ddf554241",
            "column_value": null,
            "column_type": "datetime"
        },
        {
            "column_name": "Reviewer comments (optional)",
            "column_id": "element_attributes#3923358c-85f0-444b-9287-4738d9148eb9",
            "column_value": null,
            "column_type": "string"
        }
    ], 
    [...]
]
我有一个名为
ReportTemplateColumn
的模型,该模型定义了每个项目所需的
sort\u优先级
sort\u方向
,以及相关的
column\u id

我需要遍历
ReportTemplateColumns
,并将它们的排序方向按优先级顺序应用于上述数据集

例如,我知道我需要按照
column\u id=item\u attributes\name
的顺序对数据集重新排序。数组数组需要根据
列\u值
值更改顺序

我的尝试

  def set_sorted_data(data)
    @new_data = data
    self.report_template.report_template_columns.where('sort_priority != ?', 1000).order(:sort_priority).each do |report_template_column|
      @new_data = @new_data.sort_by { |x| x[0]["column_value"] }
    end
    return @new_data
  end

我认为,
.sort_by{x|x[0][“column_value”]}
是主要问题,例如,如果您得到这样的结果

f = [[{'a' => 4}, {'a' => 2}]]
# => [[{"a"=>4}, {"a"=>2}]]
f.sort_by{|d| d[0]['a']}
# => [[{"a"=>4}, {"a"=>2}]], won't change anything
f.first.sort_by{|d| d['a'] } # first represent the [0] here
# => [{"a"=>2}, {"a"=>4}], This gonna work
使用您的方法时出现了一些错误,即您正在对外部数组进行排序,当它像这样
{x | x[0][“column_value”]}
时,我相信ruby试图对
(外部数组)
进行排序,方法是对其内部数组
(这是一个)
进行排序,方法是对名为
'column_value'
的某个属性进行排序,但是指定您对内部数组的操作将影响上面的示例中的内部数组,希望它能与您一起工作


您可以使用
排序依据将其排序到位。

下面是一个已工作的实现,可能这不是最佳的,但它可以工作:

  def set_sorted_data(data)
    @new_data = data
    self.report_template.report_template_columns.where('sort_priority != ?', 1000).order(:sort_priority).reverse.each_with_index do |report_template_column|
      @new_data[0].each_with_index do |item_row_datum, index|
        if item_row_datum[:column_id] == report_template_column.column_id
          @index = index
        end
      end
      if report_template_column.column_type == 'number'
        @new_data.sort_by! { |item_row_datum| item_row_datum[@index][:column_value].to_i }
      elsif report_template_column.column_type == 'datetime'
        @new_data.sort_by! { |item_row_datum| item_row_datum[@index][:column_value].to_date }
      else
        @new_data.sort_by! { |item_row_datum| item_row_datum[@index][:column_value].to_s }
      end
      if report_template_column.sort_direction == 'desc'
        @new_data = @new_data.reverse
      end
    end
    return @new_data
  end

谢谢你,它为我指明了正确的方向。我的实现现在也作为一个答案发布。