从 CSV 导入 JSON，按多个字段分组

Question

我想创建一个 JSON，其中包含嵌套对象数组以及针对不同字段的分组。这是 CSV，我想按 sid、年份和季度（前三个字段）对其进行分组：

S4446B3,2020,202001,2,345.45
S4446B3,2020,202001,4,24.44
S4446B3,2021,202102,5,314.55
S6506LK,2020,202002,3,376.55
S6506LK,2020,202003,3,76.23

使用以下内容拆分 CSV 后，我为每条记录获得了一个对象。

split("\n") 
   | map(split(",")) 
   | .[0:] 
   | map({"sid" : .[0], "year" : .[1], "quarter" : .[2], "customer_type" : .[3], "obj" : .[4]})

但是对于每个 sid，我都希望得到一个像这样嵌套的对象数组：

[
    {
        "sid" : "S4446B3",
        "years" : [
            {
                "year" : 2020,
                "quarters" : [
                    {
                        "quarter" : 202001,
                        "customer_type" : [
                            {
                                "type" : 2,
                                "obj" : "345.45"
                            },
                            {
                                "type" : 4,
                                "obj" : "24.44"
                            }
                        ]
                    }
                ]
            },
            {
                "year" : 2021,
                "quarters" : [
                    {
                        "quarter" : 202102,
                        "customer_type" : [
                            {
                                "type" : 5,
                                "obj" : "314.55"
                            }
                        ]
                    }
                ]
            }
        ]
    },
    {
        "sid" : "S6506LK",
        "years" : [
            {
                "year" : 2020,
                "quarters" : [
                    {
                        "quarter" : 202002,
                        "customer_type" : [
                            {
                                "type" : 3,
                                "obj" : "376.55"
                            }
                        ]
                    },
                    {
                        "quarter" : 202003,
                        "customer_type" : [
                            {
                                "type" : 3,
                                "obj" : "76.23"
                            }
                        ]
                    }
                ]
            }
        ]
    }
]

Answer 1

如果sid、year、quarter等作为键名会更直观。在命令行上使用 -R/--raw-input 和 -n/--null-input 选项，这将做到这一点：

reduce (inputs / ",")
  as [$sid, $year, $quarter, $type, $obj]
(.; .[$sid][$year][$quarter] += [{$type, $obj}])

并且，为了获得预期的输出，您可以将这些行附加到上面的程序中。

| .[][] |= (to_entries | map({quarter: .key, customer_type: .value}))
| .[]   |= (to_entries | map({year:    .key, quarters:      .value}))
| .     |= (to_entries | map({sid:     .key, years:         .value}))

从 CSV 导入 JSON，按多个字段分组

Import JSON from CSV, grouping by multiple fields

json

jq

import-from-csv