rails_admin issue: has_many :through form doesn't work

Question

I am using rails_admin gem and have this Post model

class Post < ActiveRecord::Base
  # Association
  has_many :post_categories
  has_many :categories, through: :post_categories
  has_many :post_tags
  has_many :tags, through: :post_tags

  # rails_admin configuration
  rails_admin do
    edit do
      field :title
      field :categories
      field :tags
    end
  end
end

The problem is the Category field displayed as expected but Tag field is not.

Please tell me what possibly wrong?

Answer 1

我想您会丢失accepts_nested_attributes_for :tags 。