在用户模型中创建多个参与者

时间:2013-07-12 19:41:39

标签: ruby-on-rails controller associations has-many

我正在尝试建立一个复杂的关联,其中User模型使用了两次。一旦创建讨论的领导者,然后创建参与者进行讨论。

首先,我是否有正确的关联,以便召集多个参与者(用户)进行由一个用户(领导者)领导的讨论?

用户

has_many :discussions, foreign_key: :leader_id
belongs_to :received_discussions, class_name: 'Discussion'

attr_accessible :participant_id

讨论

belongs_to :leader, class_name: 'User'
has_many :participants, class_name: 'User', foreign_key: :participant_id

第二,我如何构建将多个用户分配为参与者的操作?

形式:

  .offset2.span7.mtop20
    = simple_form_for @discussion, html: { multipart: true } do |f|
      %fieldset.well
        .mtop10
          = f.input :participant_ids, label: 'Send to: (select from members you follow)', as: :select, collection: participants_for_discussion, input_html: { class: 'followed-ids-select', multiple: true }
          = f.input :title
          = f.input :description
        .form-actions
          = f.submit 'Send', name: 'send_now', class: 'btn btn-primary btn-large pull-right mleft10'
          = f.submit 'Save and View Draft', name: 'save_draft', class: 'btn btn-large pull-right'

discussion_controller

def create
  #not sure how to assign the participants in the action
  @discussion = current_user.discussions.build(params[:discussion])


  if @discussion.save
    redirect_to @discussion, notice: draft_or_sent_notice
  else
    render :new
  end
end

我得到的错误是Can't mass-assign protected attributes: participant_ids

1 个答案:

答案 0 :(得分:1)

首先,当用户是领导者或参与者时,您希望在用户和讨论之间拥有has_and_belongs_to_many。

首先,如果您想通过关联使用habtm或has_many,您应该做出决定 http://guides.rubyonrails.org/association_basics.html#choosing-between-has-many-through-and-has-and-belongs-to-many

然后重塑你的联想,其余的问题应该自己解决。