ShpApi

Shape API gem for Rails apps containing the most common methods shared by all our API's.

Installation

Add this line to your application's Gemfile:

gem 'shp_api', '~> 0.1.0', github: 'shapehq/shp_api'

And then execute:

$ bundle install

Usage

The gem currently consists of two parts:

• Common resque_from blocks for API controllers.
• Common responses for API JSON views.

Common resque_from blocks

The base API controller should:

include ShpApi::RescueFrom

which will then return common JSON error responses for the following exceptions:

• Exception
• ActionController::ParameterMissing
• ActiveRecord::RecordNotFound

Common JSON responses

Any API controller can use the following methods to return a standard JSON response.

Generic/Shared

User not signed in

ShpApi::JsonResponder.new(self).unauthorized(message: "Unauthorized")

Returns status: 401 Unauthorized

{
  "status": "error",
  "data": {
    "message": "Unauthorized",
    "error_code": "unauthorized"
  }
}

Insufficient user rights

ShpApi::JsonResponder.new(self).forbidden

Returns status: 403 Forbidden

{
  "status": "error",
  "data": {
    "message": "User doesn't have rights to create employees",
    "error_code": "forbidden"
  }
}

Not Found

ShpApi::JsonResponder.new(self).not_found(exception: nil)

Returns status: 404 Not Found

{
  "status": "error",
  "data": {
    "message": "Not Found",
    "error_code": "not_found"
  }
}

Bad Request/Error with custom error_code

ShpApi::JsonResponder.new(self).error(message: "Not specified", error_code: "not_specified")

Returns status: 400 Bad Request

{
  "status": "error",
  "data": {
    "message": "Not specified",
    "error_code": "not_specified"
  }
}

Internal Server Error

ShpApi::JsonResponder.new(self).exception

Returns status: 500 Internal Server Error

{
  "status": "error",
  "data": {
    "message": "Internal Server Error",
    "error_code": "exception"
  }
}

Create/Update/Delete data

Create single object

ShpApi::JsonResponder.new(self).created

Returns status: 201 Created with an empty body

Update/Delete single object

ShpApi::JsonResponder.new(self).no_content

Returns status: 204 No Content with an empty body

Required parameters missing

ShpApi::JsonResponder.new(self).param_missing(exception: nil)

Returns status: 400 Bad Request

{
  "status": "error",
  "data": {
    "message": "Param not found: employee_title",
    "error_code": "param_missing"
  }
}

Object validation failed

ShpApi::JsonResponder.new(self).model_error(message: "Invalid", model_errors: nil)

Returns status: 422 Unprocessable Entity

{
  "status": "error",
  "data": {
    "message": "Invalid",
    "error_code": "invalid"
  }
}

The "data" element can also sometimes include an "errors" object containing the name of the model who's validation failed and an array including the specific validation errors:

{
  "data": {
    "error_code": "invalid",
    "errors": {
      "rating": [
        "must be a number between 0 and 10"
      ]
    },
    "message": "Invalid"
  },
  "status": "error"
}

Object Conflict

ShpApi::JsonResponder.new(self).conflict(message: "Conflict")

Returns status: 409 Conflict

{
  "status": "error",
  "data": {
    "message": "Conflict",
    "error_code": "conflict"
  }
}

Other

200 OK with an empty body

ShpApi::JsonResponder.new(self).ok

Returns status: 200 OK with an empty body

This is used for returning a positive result to fx. a jQuery ajax request where no return data is needed.

200 OK with data

data = User.all.as_json(include: [:device_tokens])
meta = { :current_page => 1 }
ShpApi::JsonResponder.new(self).data(data: data, meta: meta, status: :ok)

Returns status: 200 OK with a body:

{
  "status": "success",
  "meta": {
    "current_page": 1,
    "total_page_count": 3,
    "page_record_count": 25,
    "total_record_count": 53,
    "links": {
      "next": "http://localhost:3000/api/v1/users?page=2&per_page=25",
      "prev": null,
      "last": "http://localhost:3000/api/v1/users?page=3&per_page=25",
      "first": "http://localhost:3000/api/v1/users?page=1&per_page=25"
    }
  },
  "data": [
    {
      "id": 1,
      "email": "gert+user@shape.dk",
      "name": "Gert User Jørgensen",
      "created_at": "2015-10-26T13:45:27.789Z",
      "updated_at": "2015-10-26T13:45:27.789Z",
      "device_tokens": [
        {
          "id": 1,
          "token": "token-1445873776",
          "platform": "apns"
        }
      ]
    }
  ]
}

This is used for returning a positive result to fx. a jQuery ajax request where no return data is needed.

Releasing a new version

• Bump version number in lib/shp_api/version.rb
• Commit changes & push changes.
• git tag -a v<version_number>
• git push origin master
• git push --tags origin master

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request