Question

我有一个Ruby / Rails视图，其中员工姓名将显示在Y轴（左侧）和周日期从星期日开始到周末结束。

            '2017-02-05'    '2017-02-06'    '2017-02-07'    '2017-02-08'    '2017-02-09'   '2017-02-10'   '2017-02-11'

Employee_1       7                                                3             4.5

Employee_2                      4               6.2              0.5                          10.5

当我从数据库中提取详细信息时，数据将采用以下格式。日期格式为YYYY-MM-DD。

@data = 
    {"Employee_1"=>
      [{"week_date"=>"2017-02-05",
        "log_time"=>"7"},
       {"week_date"=>"2017-02-08",
        "log_time"=>"3"},
       {"week_date"=>"2017-02-09",
        "log_time"=>"4.5"}],
     "Employee_2"=>
      [{"week_date"=>"2017-02-06",
        "log_time"=>"4"},
       {"week_date"=>"2017-02-07",
        "log_time"=>"6.2"},
       {"week_date"=>"2017-02-08",
        "log_time"=>"0.5"},
       {"week_date"=>"2017-02-10",
        "log_time"=>"10.5"}]
    }

另外，我们有一个包含工作日的数组：

@week_days = ["2017-02-05", "2017-02-06", "2017-02-07", "2017-02-08",  "2017-02-09", "2017-02-10", "2017-02-11"]

如何循环此结构并显示数据可用日期的数据，并在视图中的HTML表结构中跳过其余日期？

Answer 1

让我们从准备步骤开始。我们需要stub周工作日，我们稍后会将其用作原始数据的支架：

stub = @week_days.map { |wd| {wd => ""} }.reduce(&:merge)

和原始数据的缩减器：

reducer = ->(v) {
  v.map { |h| {h["week_date"] => h["log_time"]} }.reduce(&:merge)
}

好的，我们都准备好了。

@data.map { |k, v| [k, stub.merge(reducer.(v))] }.to_h
#⇒ {
#  "Employee_1" => {
#    "2017-02-05" => "7",
#    "2017-02-06" => "",
#    "2017-02-07" => "",
#    "2017-02-08" => "3",
#    "2017-02-09" => "4.5",
#    "2017-02-10" => "",
#    "2017-02-11" => ""
#  },
#  "Employee_2" => {
#    "2017-02-05" => "",
#    "2017-02-06" => "4",
#    "2017-02-07" => "6.2",
#    "2017-02-08" => "0.5",
#    "2017-02-09" => "",
#    "2017-02-10" => "10.5",
#    "2017-02-11" => ""
#  }
# }

现在只需重复上述操作并打印值。

循环遍历数据集 - Ruby

1 个答案: