如何在Ruby中创建包含数组的JSON数据（哈希）

我试图找到一种在ruby中对JSON数据进行排序的方法。它存储为一个相当复杂的散列（我想无论如何也是如此），如下所示：

{
    "allergies": {
        "allergy": [
            {
                "id": "11426793",
                "name": "Milk",
                "category": "Food Allergy",
                "createdPerson": "AGUDELO-HERNANDEZ  ARCADIO",
                "onsetDate": "2014-05-05T00:29:28-04:00"
            }, {
                "id": "11426788",
                "name": "Antibiotics",
                "category": "Drug Allergy",
                "createdPerson": "Smith John H",
                "onsetDate": "2014-05-04T22:29:28-04:00"
            }
        ]
    },
    "responseErrors": {
        "responseError": []
    }
}

实际数据中存在更多的“过敏”对象，我希望能够按“onsetDate”然后按“name”对它们进行排序。我试过：

sorted = @allergies["allergies"].sort_by { |hsh| hsh["name"] }

但我得到了以下错误：

no implicit conversion of String into Integer (TypeError)

你就快到了：

require "json"

str = <<EOS 
 {
  "allergies": {
    "allergy": [
    {
      "id": "11426793",
      "name": "Milk",
      "category": "Food Allergy",
      "createdPerson": "AGUDELO-HERNANDEZ  ARCADIO",
      "onsetDate": "2014-05-05T00:29:28-04:00"
   },
   {
     "id": "11426788",
     "name": "Antibiotics",
     "category": "Drug Allergy",
     "createdPerson": "Smith John H",
     "onsetDate": "2014-05-04T22:29:28-04:00"
   }

]
},
"responseErrors": {
  "responseError": []
}
}
EOS

@allergies = JSON.parse(str)
puts @allergies["allergies"]["allergy"].sort_by { |hsh| hsh["name"] }

需要“json”
str=
@allergies[“allergies”]
返回一个散列，即：

{
    "allergy": [
        {
            "id": "11426793",
            "name": "Milk",
            "category": "Food Allergy",
            "createdPerson": "AGUDELO-HERNANDEZ  ARCADIO",
            "onsetDate": "2014-05-05T00:29:28-04:00"
        }, {
            "id": "11426788",
            "name": "Antibiotics",
            "category": "Drug Allergy",
            "createdPerson": "Smith John H",
            "onsetDate": "2014-05-04T22:29:28-04:00"
        }
    ]
}

对散列调用
sort\u by
，它将为块生成每个键值对。所以在

@allergies["allergies"].sort_by { |hsh| hsh["name"] }

hsh
是一个数组
Array#[]
需要整数作为参数。它将尝试将
“name”
转换为整数，并失败，出现您看到的错误

你需要

@allergies["allergies"]["allergy"].sort_by { |hsh| hsh["name"] }

或者，如果要对值进行适当排序，以便原始数据已排序，请使用排序依据