API with Rails

You guys have learned how to make api's in different frameworks. This is a guide to making one in rails. The rails api gem is a common gem to make a rails api. Many companies use rails for their backend and use a frontend framework for their views. For example, springleaf financial uses rails api with ember. You can use rails api with react or angular if you wanted to.

gem install rails-api
rails-api new app_name -d postgresql

def index
    @song = Song.all
    render json: @song, status: :ok
end

def show
    render json: @song
end

def create
    @song = Song.new

    if @song.save
        render json: @song, status: :created
    else
        render json: @song.errors, status: :unprocessable_entity
    end
end

def update
    if @song.update(song_params)
        head :no_content
    else
        render json: @song.errors, status: :unprocessable_entity
    end
end

def destroy
    @song.destroy

    head :no_content
end

Common Status Codes

2XX Sucess Codes

4xx Client Error

Independent Practice

• Add show, edit, and delete functionality in api
• Add at least one private method
• Add at least one validation