JSON to nlohmann::json initializer_list

[janwiesemann]

A few weeks ago I've started writing a collection of development tools. One of my first tools is a simple JSON to nlohmann::json initializer_list converter.

Try it out: https://dev.janwiesemann.de/index.php?id=cpp/json_to_nlohmann_json

Just past some JSON and you'll get result.

Example using OTTO Market Product API-JSON

JSON

[
  {
    "productReference": "UBN-11779",
    "sku": "3858389911564",
    "ean": "3858389911564",
    "isbn": "978-3-16-148410-0",
    "upc": "042100005264",
    "pzn": "PZN-4908802",
    "mpn": "H2G2-42",
    "moin": "M00A1234BC",
    "offeringStartDate": "2019-10-19T09:30:00.000Z",
    "releaseDate": "2019-10-19T09:30:00.000Z",
    "maxOrderQuantity": 5,
    "productDescription": {
      "category": "Outdoorjacke",
      "brand": "Adidas",
      "productLine": "501",
      "manufacturer": "3M",
      "productionDate": "2021-07-02T09:30:52.093Z",
      "multiPack": true,
      "bundle": false,
      "fscCertified": true,
      "disposal": false,
      "productUrl": "http://myproduct.somewhere.com/productname/",
      "description": "<p>Some example words...<b>in bold</b>...some more</p>",
      "bulletPoints": [
        "My top key information..."
      ],
      "attributes": [
        {
          "name": "Bundweite",
          "values": [
            "34"
          ],
          "additional": true
        }
      ]
    },
    "mediaAssets": [
      {
        "type": "IMAGE",
        "location": "http://apartners.url/image-location"
      }
    ],
    "delivery": {
      "type": "PARCEL",
      "deliveryTime": 1
    },
    "pricing": {
      "standardPrice": {
        "amount": 19.95,
        "currency": "EUR"
      },
      "vat": "FULL",
      "msrp": {
        "amount": 19.95,
        "currency": "EUR"
      },
      "sale": {
        "salePrice": {
          "amount": 19.95,
          "currency": "EUR"
        },
        "startDate": "2019-10-19T09:30:00.000Z",
        "endDate": "2019-10-19T09:30:00.000Z"
      },
      "normPriceInfo": {
        "normAmount": 100,
        "normUnit": "g",
        "salesAmount": 500,
        "salesUnit": "g"
      }
    },
    "logistics": {
      "packingUnitCount": 3,
      "packingUnits": [
        {
          "weight": 365,
          "width": 600,
          "height": 200,
          "length": 300
        }
      ]
    }
  }
]

Result

nlohmann::json::array(
{
    {
        { "productReference", "UBN-11779" },
        { "sku", "3858389911564" },
        { "ean", "3858389911564" },
        { "isbn", "978-3-16-148410-0" },
        { "upc", "042100005264" },
        { "pzn", "PZN-4908802" },
        { "mpn", "H2G2-42" },
        { "moin", "M00A1234BC" },
        { "offeringStartDate", "2019-10-19T09:30:00.000Z" },
        { "releaseDate", "2019-10-19T09:30:00.000Z" },
        { "maxOrderQuantity", 5 },
        { "productDescription", 
            {
                { "category", "Outdoorjacke" },
                { "brand", "Adidas" },
                { "productLine", "501" },
                { "manufacturer", "3M" },
                { "productionDate", "2021-07-02T09:30:52.093Z" },
                { "multiPack", true },
                { "bundle", false },
                { "fscCertified", true },
                { "disposal", false },
                { "productUrl", "http://myproduct.somewhere.com/productname/" },
                { "description", "<p>Some example words...<b>in bold</b>...some more</p>" },
                { "bulletPoints", nlohmann::json::array(
                    {
                        "My top key information..."
                    })
                },
                { "attributes", nlohmann::json::array(
                    {
                        {
                            { "name", "Bundweite" },
                            { "values", nlohmann::json::array(
                                {
                                    "34"
                                })
                            },
                            { "additional", true }
                        }
                    })
                }
            }
        },
        { "mediaAssets", nlohmann::json::array(
            {
                {
                    { "type", "IMAGE" },
                    { "location", "http://apartners.url/image-location" }
                }
            })
        },
        { "delivery", 
            {
                { "type", "PARCEL" },
                { "deliveryTime", 1 }
            }
        },
        { "pricing", 
            {
                { "standardPrice", 
                    {
                        { "amount", 19.95 },
                        { "currency", "EUR" }
                    }
                },
                { "vat", "FULL" },
                { "msrp", 
                    {
                        { "amount", 19.95 },
                        { "currency", "EUR" }
                    }
                },
                { "sale", 
                    {
                        { "salePrice", 
                            {
                                { "amount", 19.95 },
                                { "currency", "EUR" }
                            }
                        },
                        { "startDate", "2019-10-19T09:30:00.000Z" },
                        { "endDate", "2019-10-19T09:30:00.000Z" }
                    }
                },
                { "normPriceInfo", 
                    {
                        { "normAmount", 100 },
                        { "normUnit", "g" },
                        { "salesAmount", 500 },
                        { "salesUnit", "g" }
                    }
                }
            }
        },
        { "logistics", 
            {
                { "packingUnitCount", 3 },
                { "packingUnits", nlohmann::json::array(
                    {
                        {
                            { "weight", 365 },
                            { "width", 600 },
                            { "height", 200 },
                            { "length", 300 }
                        }
                    })
                }
            }
        }
    }
})

[nlohmann]

Nice little tool - converting arbitrary JSON into a ready-to-paste nlohmann::json initializer_list is a handy time-saver when hand-writing test fixtures or sample data. Thanks for building and sharing it.

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This reply was drafted by Claude Code on behalf of @nlohmann, as part of a review of open discussions.