operation.rb

class Create < Trailblazer::Operation
  include Model
  model Workflow

  contract do
    property :name
    property :description

    collection :steps, populate_if_empty: Step do
      property :form, populate_if_empty: lambda { |params, *| Form.find(params[:id]) }
      #validates :form, presence: true
      property :user, populate_if_empty: lambda { |params, *| User.find(params[:id]) }
      #validates :user, presence: true
    end

    validates :name, presence: true
    validates :steps, presence: true, length: {minimum: 1}
  end
  
  def process(params)
    validate(params[:workflow]) do |workflow|
      workflow.save
    end
  end
end