我想使用虛擬屬性將Simple_forms合併到我的應用程序中。我正在關注http://railscasts.com/episodes/102-auto-complete-association-revised以獲得自動完成功能。 Simple_form在我不使用虛擬屬性時起作用,但當我使用虛擬屬性時,出現「Association:head_coach_name not found」錯誤。使用虛擬屬性的rails simple_form
我的團隊模式是:
class Team < ActiveRecord::Base
attr_accessor :head_coach_name
belongs_to :user
validates :team_name, presence: true
belongs_to :head_coach, class_name: "User", :foreign_key => "head_coach_id"
def head_coach_name
user.try(:name)
end
def head_coach_name=(name)
self.user = User.find_by_name(name) if name.present?
end
end
我的用戶模型爲:
class User < ActiveRecord::Base
has_many :teams, :class_name => "::Team", dependent: :destroy
end
筆者認爲:
<%= simple_form_for @team, html: {class: 'form-horizontal' }, url: teams_path, method: 'post' do |f| %>
<%= f.error_notification %>
<%= f.hidden_field :user_id %>
<div class="col-md-6">
<div class="row">
<div class="col-md-12">
<%= f.input :team_name, class: "form-control" %>
<%= f.input :year, collection: Date.today.year-90..Date.today.year %>
<%= f.input :season, as: :select, collection:
['Fall',
'Winter',
'Spring',
'Summer'] %>
<%= f.input :season_type, as: :select, collection:
['Outdoor',
'Indoor',
'Tournament'] %>
<%= f.input :awards %>
</div>
</div>
</div>
<div class="col-md-6">
<div class="row">
<div class="col-md-12">
<%= f.input :club %>
<%= f.input :division %>
<%= f.association :head_coach_name %>
<%= f.input :assistant_coach_id %>
<%= f.input :assistant_coach_two_id %>
</div>
</div>
</div>
<%= f.button :submit, label: "Add team", class: "btn btn-large btn-primary col-md-3 pull-right" %>
<% end %>
一切工作只要我沒有虛擬那裏有關聯。我可以把:head_coach,它會與下拉列表一起工作,但我想使用像railscast視頻中的自動完成功能。同樣在導軌控制檯我可以運行這些命令來顯示虛擬屬性適用於:
2.1.2 :003 > team.head_coach_name
User Load (0.6ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 100 LIMIT 1
=> "Miss Daisha Shanahan"
我如何能得到虛擬屬性與simple_forms正常工作任何想法?
謝謝。這解決了我未發現的關聯問題。我對軌道上的紅寶石很陌生。你能否詳細談談你談論的古怪事物? @steel – Mike 2014-11-26 15:46:01
當然,@Mike。我添加了一個例子。如果你是Rails的新手,很好的使用.try()。 – steel 2014-11-26 16:13:00