Rails: to_json method, add a function return value

Question

I have model User. User contain :name and :second_name fields. I define function in model

def full_name
    self.name + ' ' + self.second_name
end

When I call to_json() method on user object i get {name: '...', second_name: '...'}. How I add to result full_name field?

Bryan Oemar · Accepted Answer · 2015-11-21 18:24:29Z

2

How about defining as_json method in your User model and overriding the default behaviour of to_json.

So this will become:

def as_json(options)
  super(:methods => [:full_name])
end

For reference also see: http://api.rubyonrails.org/classes/ActiveModel/Serializers/JSON.html

answered Nov 21, 2015 at 18:24

Bryan Oemar

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1 Comment

trh Over a year ago

As Bryan notes, this is clean and allows you to call multiple class methods. Additionally you can also exclude items that are unnecessary by adding except in your options

Long Nguyen · Accepted Answer · 2015-11-21 18:25:02Z

1

Override .as_json in your User model, add following lines to your user model:

def as_json(options)
  super.merge({
      full_name: "#{self.name} #{self.second_name}"
  })
end

And in your controller, just write: render @user, don't explicit call .to_json

answered Nov 21, 2015 at 18:25

Long Nguyen

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