JsonUpdater

This gem will help you update your json files to a given pattern. It will be useful for fixtures that contain many json files and are frequently updated.

Installation

Add this line to your application's Gemfile:

gem 'json_updater'

And then execute:

$ bundle

Or install it yourself as:

$ gem install json_updater

Usage

To use this gem just write:

$ json_updater path_to_etalon_file.json path_to_changeable_file.json

You can add new fields or delete old ones at any nesting level. Everything works well for fields with arrays too.

Examples

Add new fields

# etalon_file.json
{
  "name": "John",
  "age": 30,
  "car": null,
  "available": null,
  "another_field": null,
  "one_more_field": null
}

# changeable_file.json
{
  "name": "Nick",
  "age": 12,
  "car": null
}

# json_updater etalon_file.json changeable_file.json
# result =>

{
  "name": "Nick",
  "age": 12,
  "car": null,
  "available": null,
  "another_field": null,
  "one_more_field": null
}

___

Remove old fields

# etalon_file.json
{
  "name": "John"
}

# changeable_file.json
{
  "name": "Nick",
  "age": 12,
  "car": null
}

# json_updater etalon_file.json changeable_file.json
# result =>
{
  "name": "Nick"
}

___

Add new fields to hash inside array

# etalon_file.json
{
  "cars": [{
    "model": "BMV",
    "country": "Germany",
    "motor": null,
    "main": {
      "number": "2",
      "document_id": "1"
    }
  }]
}

# changeable_file.json
{
  "cars": [
    {
      "model": "Mazda",
      "country": "Japan",
      "main": {
        "number": "20",
        "document_id": "1"
      }
    },
    {
      "model": "Zil",
      "country": "Russia",
      "main": {
        "number": "21",
        "document_id": "1"
      }
    },
    {
      "model": "Ford",
      "country": "USA",
      "main": {
        "number": "22",
        "document_id": "1"
      }
    }
  ]
}

# json_updater etalon_file.json changeable_file.json
# result =>
{
  "cars": [
    {
      "model": "Mazda",
      "country": "Japan",
      "motor": null,
      "main": {
        "number": "20",
        "document_id": "1"
      }
    },
    {
      "model": "Zil",
      "country": "Russia",
      "motor": null,
      "main": {
        "number": "21",
        "document_id": "1"
      }
    },
    {
      "model": "Ford",
      "country": "USA",
      "motor": null,
      "main": {
        "number": "22",
        "document_id": "1"
      }
    }
  ]
}

___

Update the lowest level of nesting

# etalon_file.json
{
  "name": "Petr",
  "age": 22,
  "car": {
    "model": "BMV",
    "country": {
      "name": "Germany",
      "language": "germanese",
      "population": [{
        "size": "80 mln",
        "highest_age": "88",
        "average_age": "55"
      }]
    }
  }
}

# changeable_file.json
{
  "name": "Nick",
  "age": 12,
  "car": {
    "model": "Mazda",
    "country": {
      "name": "Japan",
      "language": "japanese",
      "population": [
      {
        "size": "120 mln",
        "highest_age": "101"
      },
      {
        "size": "320 mln",
        "highest_age": "99"
      }
    ]
    }
  }
}


# json_updater etalon_file.json changeable_file.json
# result =>
{
  "name": "Nick",
  "age": 12,
  "car": {
    "model": "Mazda",
    "country": {
      "name": "Japan",
      "language": "japanese",
      "population": [
        {
          "size": "120 mln",
          "highest_age": "101",
          "average_age": "55"
        },
        {
          "size": "320 mln",
          "highest_age": "99",
          "average_age": "55"
        }
      ]
    }
  }
}

___

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/juggleross/json_updater. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the JsonUpdater project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

json_updater

Development

Runtime