RenderHash

RenderHash is an alternative to .as_json in rails providing simple syntax to generate nested hash from any ruby object

Installation

Add this line to your application's Gemfile:

gem 'render_hash'

And then execute:

$ bundle

Or install it yourself as:

$ gem install render_hash

RenderHash module can be included to a class

user.render(:name, :age) #=> {name: "bob", age: 20}

or render directly

RenderHash.render(user, :name, :age) #=> {name: "bob", age: 20}

render from methods

user.render(:name, :age) #=> {name: "bob", age: 20}

render from methods with a custom key

user.render({username: :name}, :age) #=> {username: "bob", age: 20}

render a custom key and value

user.render({hobby: "fishing"}) #=> {hobby: "fishing"}

hash expressions can be grouped together

user.render({username: :name}, {hobby: "fishing"}) ==
user.render({username: :name, hobby: "fishing"})

render a custom key and value with lambda

name_with_age = ->(user){"#{user.name}(#{user.age})"}
user.render({name_with_age: name_with_age}) #=> {name_with_age: "bob(20)"}

render nested hash from a method returns an array

user.render([jobs: [:title]])
#=> {jobs: [{title: "doctor"}, {title: "driver"}]}

render with an array

RenderHash.render([user1, user2], :name) #=> [{name: "bob"}, {name: "tom"}]