grape-utils

Grape::Utils

This gem offers some templates for basic CRUD endpoints using grape, grape-entity and grape-kaminari

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add grape-utils

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install grape-utils

Basic Usage

Given you already have a Grape API set up, and a model Foo, with a Entities:Foo, you can Use ::Grape::Utils::Templates::Crud as follows:

module AwesomeAPI
  module Resources
    class Foo < Base

      resource :foos do
        mount ::Grape::Utils::Templates::Crud, with: {
          # The collection that will be used for the index endpoint
          index: Foo.all,
          # The ActiveModel instance that will be used to create, update and find_by!
          model: Foo,
          # The entity that will be used as a return type
          entity: Entities::Foo,
          # The required params for the Create endpoint
          required_params: [:name]
        }
      end
    end
  end
end

This will mount 5 endpoints in your API: Index, Show, Create, Update and Delete

Each of this templates can also be accessed individually if needed:

module AwesomeAPI
  module Resources
    class Foo < Base

      resource :foos do
        mount Grape::Utils::Templates::Index, with: { model: Foo, scope: Foo.all, entity: Entities::Foo }
        mount Grape::Utils::Templates::Show, with: { model: Foo, entity: Entities::Foo }
        mount Grape::Utils::Templates::Create, with: { model: Foo, entity: Entities::Foo}
        mount Grape::Utils::Templates::Update, with: { model: Foo.all, entity: Entities::Foo }
        mount Grape::Utils::Templates::Delete, with: { model: Foo, entity: Entities::Foo }

        route_param :id, type: Integer do
            get 'nested_foo' do
                #Any other relevant logic
            end
        end
      end
    end
  end
end

This way you can customize one of the methods to fit your situation while still using the rest as standard

Entities and Params

The Entities Definition is used in 2 essential ways: first as a return type, and second as the param definition for the POST and PATCH endpoints

From the Entities exposed fields, only those with a documentation property will be used as a param on the POST/PATCH endpoints

So given:

module AwesomeAPI
  module Entities
    class Foo < Grape::Entity
      expose :id
      expose :name, documentation: { type: String }
      expose :configuration, documentation: { type: JSON }
      expose :created_at
      expose :updated_at
    end
  end
end

Only name and configuration will be accepted as params in POST and PATCH endpoints, with it's corresponding types

Required Params

You can define which of the documented exposed fields of the Entity are required for the creation of the resource by mounting ::Grape::Utils::Templates::Crud or ::Grape::Utils::Templates::Create with required_params: String[]

ID Column

By default, it is assumed that the resources will be identified by the column id This will be used as the route parameter of the Show, Update and Delete endpoints, and by means of which, the resource will be located If you want to change the name of the column to use as id, you can mount the relevant templates with{... column_id: 'field_key' }

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/Nix41/grape-utils. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

Particularly I am still working on getting the gem 100% covered

License

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

Code of Conduct

Everyone interacting in the Grape::Utils project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.