rails_admin拋出未定義的方法`html_safe'爲零：NilClass

Question

這是我的模型。在其他類似型號上工作時沒有錯誤。 不確定如何解決此問題。任何幫助是極大的讚賞。由於

class OrderProduct 
include Mongoid::Document 
include Mongoid::Token 

validates :quantity, :numericality => { :greater_than => 0 } 

before_save :pre_save 
after_save :post_save 

token :field_name => :code, :pattern => "%C3%d7%C2" 

field :quantity, type: Integer, :default => 1 
field :notes, type: String 
field :fit_satisfactory, type: Boolean, :default => true, overwrite: true 
field :alteration_cost, type: Float, default: 0.0 
field :fit_status_saved, type: Date, default: nil 
field :initials, type: String 
field :last_product_type_order, type: String, default: nil 
auto_increment :sequence, :seed => 10000 

belongs_to :order_product_status 

belongs_to :product, autosave: true 
belongs_to :order 
belongs_to :product_fit 
has_many :product_fit_entry_values, autosave: true 

embeds_many :customizations, class_name: "OrderProductCustomization" 

Answer 1

看起來像其他人也遇到了同樣的問題，並張貼了rails_admin GitHub的頁面上：

• Issue 1852

有人用變通回答，請隨時免費試用那些。但是，問題仍然存在，所以rails_admin還沒有正式補丁。