Question

I have Users, Projects and Tasks.

Users have many tasks
Projects have tasks

Tasks belongs to users
Tasks belong to projects

One of the fields of the Tasks Model is Project_id.

I need that when a user creates a new task, a new project is created, and the task created gets the id of the new project created in its Project_id field, so it gets automatically associated with it.

My problem is that when creating the new task, the project has not been created yet, so the project_id is null, could anyone please at least point me in the right direction?

Answer 1

How about doing it in a before_create callback?

class Task

  before_create :create_project

  def create_project
    new_project = Project.new(...)

    unless new_project.save
      self.errors.add(:base, "Couldn't create project.")
      return false
    end

    self.project_id = new_project.id
  end

end

The return false bit there is necessary to prevent the Task object from saving with an invalid Project and to add errors to it that can be displayed in your view.