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我有3款這樣的:simple_form,錯誤與:has_many:通過關係?
class CertificatorBtwInstructor < ActiveRecord::Base
belongs_to :certificator
belongs_to :instructor
# other code ...
end
class Certificator < ActiveRecord::Base
has_many :btw_instructors, :class_name => "CertificatorBtwInstructor"
has_many :instructors, :through => :btw_instructors
# other code ...
end
class Instructor < ActiveRecord::Base
has_many :btw_certificators, :class_name => "CertificatorBtwInstructor"
has_many :certificators, :through => :btw_certificators
# other code ...
end
我的導師新形式我已經設置:
= simple_form_for([:cm, @instructor], :html => { :class => "fAdm" }) do |f|
= f.object.errors
- others fields ...
= f.input :certificator_ids, :required => false, :collection => Certificator.choices_relation_select, :input_html => { :multiple => true, :size => 12 }
%div.row.buttons
= f.button :submit
然後,當我提交表單,而不從「certificator_ids」輸入集合中選擇任何Certificator ,新紀錄創建沒有問題。 但是,當我選擇在「certificator_ids」輸入收集任何項目,一個錯誤出現(我用= f.object.errors進行可視化),錯誤是這樣的:
{:certificators=>["is not valid"]}
,但在我的形式我沒有設置領域'認證者',所以我不明白爲什麼他們有這個屬性。