Dead simple parser / deserializer for json api (https://jsonapi.org/)

Install

gem 'jsonapi-unwrapper', '~> 0.0.3'

gem install jsonapi-unwrapper

Having issues?

Please let me know and create a issue

Use

Basic Example

require "jsonapi-unwrapper"
json = {
  "data" => {
    "id" => 1,
    "type" => "users",
    "attributes" => { "name" => "Joe" },
    "relationships" => {
      "pet" => {
        "data" => { "id" => 1, "type" => "pets" },
      },
    },
  },
  "included" => [
    {
      "id" => 1,
      "type" => "pets",
      "attributes" => {
        "type" => "turtle",
        "name" => "Josef",
      },
    },
  ],
}
parsed = JsonApiUnwrapper.call(json)
parsed["id"] # => 1
parsed["type"] # => "users"
parsed["name"] # => "Joe"
parsed["pet"]["id"] # => 1
parsed["pet"]["type"] # => "pets"
parsed["pet"]["name"] # => "Josef"

Multiple Entities

json = {
  "data" => [
    { "id" => 1, "type" => "users", "attributes" => { "name" => "Joe" } },
    { "id" => 2, "type" => "users", "attributes" => { "name" => "Tom" } },
  ]
}
parsed = JsonApiUnwrapper.call(json)
# Returns an array of parsed entities

Edge Cases

Nil or Missing Data:

JsonApiUnwrapper.call({ "data" => nil }) # => nil
JsonApiUnwrapper.call({}) # => nil

Missing Attributes:

json = { "data" => { "id" => 1, "type" => "users" } }
parsed = JsonApiUnwrapper.call(json)
# Attributes will be an empty hash

Relationships Without Included Resources:

json = {
  "data" => {
    "id" => 1,
    "type" => "users",
    "attributes" => { "name" => "Joe" },
    "relationships" => {
      "pet" => { "data" => { "id" => 1, "type" => "pets" } }
    }
  },
  "included" => []
}
parsed = JsonApiUnwrapper.call(json)
parsed["pet"] # => { "id" => 1, "type" => "pets" } (resource identifier returned)

Resource Meta and Links:

json = {
  "data" => {
    "id" => 1,
    "type" => "users",
    "attributes" => { "name" => "Joe" },
    "meta" => { "version" => 2 },
    "links" => { "self" => "http://example.com/users/1" }
  }
}
parsed = JsonApiUnwrapper.call(json)
parsed["meta"] # => { "version" => 2 }
parsed["links"] # => { "self" => "http://example.com/users/1" }

Relationship Meta and Links:

json = {
  "data" => {
    "id" => 1,
    "type" => "users",
    "attributes" => { "name" => "Joe" },
    "relationships" => {
      "pet" => {
        "data" => { "id" => 1, "type" => "pets" },
        "meta" => { "count" => 1 },
        "links" => { "self" => "http://example.com/users/1/relationships/pet" }
      }
    }
  },
  "included" => [
    { "id" => 1, "type" => "pets", "attributes" => { "name" => "Josef" } }
  ]
}
parsed = JsonApiUnwrapper.call(json)
parsed["pet"]["_meta"] # => { "count" => 1 }
parsed["pet"]["_links"] # => { "self" => "http://example.com/users/1/relationships/pet" }

Null Relationships:

json = {
  "data" => {
    "id" => 1,
    "type" => "users",
    "attributes" => { "name" => "Joe" },
    "relationships" => {
      "pet" => { "data" => nil }
    }
  }
}
parsed = JsonApiUnwrapper.call(json)
parsed["pet"] # => nil

Output Structure

The unwrapped output includes:

id: The resource identifier
type: The resource type (always preserved, takes precedence over any attribute named "type")
All attributes from the attributes object
All relationships as nested objects/arrays
links: Resource-level links (if present)
meta: Resource-level meta (if present)
_links: Relationship-level links (if present, prefixed with underscore to avoid conflicts)
_meta: Relationship-level meta (if present, prefixed with underscore to avoid conflicts)

Error Handling

The library handles missing or malformed data gracefully:

Returns nil if data is nil or missing
Returns empty hash {} if attributes is missing
Returns resource identifier {id, type} for relationships that don't have corresponding included resources
Returns nil for null relationships

Contributing

Feel free to create a pull request