Rails converts empty arrays into nils in params of the request

Question

I have a Backbone model in my app which is not a typical flat object, it\'s a large nested object and we store the nested parts in TEXT columns in a MySQL database.

I wa

Answer 1

You can re-parse the parameters on your own, like this:

class ApiController
  before_filter :fix_json_params    # Rails 4 or earlier
  # before_action :fix_json_params  # Rails 5

  [...]

  protected

  def fix_json_params
    if request.content_type == "application/json"
      @reparsed_params = JSON.parse(request.body.string).with_indifferent_access
    end
  end

  private

  def params
    @reparsed_params || super
  end
end

This works by looking for requests with a JSON content-type, re-parsing the request body, and then intercepting the params method to return the re-parsed parameters if they exist.