在Rails中通过user_id进行验证

Question

我有这个由user_id验证的代码。如果category_name存在，则会阻止创建新Object。代码有效，但我不相信这是最好的做法。

   def create
   @item_category = ItemCategory.new(item_category_params)
   @item_category.user_id = current_user.id
   search = ItemCategory.where(:name => @item_category.name,:user_id => current_user.user_id)

if search.blank?
  respond_to do |format|
    if @item_category.save
      format.html { redirect_to :back, notice: 'Se ha creado la categoria' }
      format.json { render action: 'show', status: :created, location: @item_category }    
    else
      format.html { render action: 'new' }
      format.json { render json: @item_category.errors, status: :unprocessable_entity }
    end
  end
else
    respond_to do |duplicate|
    duplicate.html { redirect_to @item_category, alert: 'Categoria Repetida' }
    duplicate.json { render json: @item_category.errors, status: :unprocessable_entity}
  end
end
end

感谢。

Answer 1

最好将验证放在ItemCategory模型中......

class ItemCategory < ActiveRecord::Base
  validates_uniqueness_of :name, :scope => :user_id

  ...
end