rails mongo get all model names

mongo_id_get_all_model_names.rb

  desc 'get Models'do
    headers "Authentication-Token"=>{description: 'token',required: true }
  end
  get 'all_models' do
    Rails.application.eager_load! if Rails.env.development?
    models = Mongoid::Config.models
    #fields.values.map{|f| o = f.options;{name: f.name,type: o[:type], kclass: o[:klass].to_s }}
    present :models, models.map{|m|{model_name: m.to_s, relations: m.relations, field_names: m.fields.keys, fields: m.fields.values.map{|f| o = f.options;{name: f.name,type: o[:type].to_s, kclass: o[:klass].to_s }}}}
  end