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copied!<p>I've checked active_model_serializers, RABL and JBuilder. None of them allow to customize the JSON format that is received.</p> <p>For that one must deal with wrap_parameters, see <a href="http://edgeapi.rubyonrails.org/classes/ActionController/ParamsWrapper.html" rel="nofollow">http://edgeapi.rubyonrails.org/classes/ActionController/ParamsWrapper.html</a> It works, still the code is ugly: I get JSON stuff inside my controller + the serializer/model instead of one place.</p> <p>Example of use of wrap_parameters:</p> <pre><code>class EventsController < ApplicationController wrap_parameters :event, include: [:title, :start, :end, :allDay, :description, :location, :color] def create respond_with Event.create(params[:event]) end end </code></pre> <p>and then inside my model (Frederick Cheung is right on this part):</p> <pre><code>class Event < ActiveRecord::Base attr_accessible :title, :start, :end, :allDay, :description, :location, :color # JSON input allDay is all_day alias_attribute :allDay, :all_day # JSON input start is starts_at # +datetime+:: UNIX time def start=(datetime) self.starts_at = Time.at(datetime) end # JSON input end is starts_at # +datetime+:: UNIX time def end=(datetime) self.ends_at = Time.at(datetime) end # Override the JSON that is returned def as_json(options = nil) { id: id, title: title, start: starts_at, # ISO 8601, ex: "2011-10-28T01:22:00Z" end: ends_at, allDay: all_day, description: description, # Not rendered by FullCalendar location: location, color: color } end end </code></pre> <p>For info ASP.NET MVC (with Json.NET) does it using C# decorator attributes which is pretty elegant:</p> <pre><code>class Post { [JsonPropertyAttribute("title")] public string Title; } </code></pre> <p>I have created a gist that shows how to implement serialization/deserialization: <a href="https://gist.github.com/3858908" rel="nofollow">https://gist.github.com/3858908</a></p>

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