ruby-on-rails - rails : Increment a column and update attributes

Question

我试图在创建项目时增加一列并更新属性:

def items_create
  @categories = Category.all
  @item = Item.new(item_params)
  @item.store_id = current_store.id
  @item.update(account_id: current_store.account.id)
  @search_suggestion = SearchSuggestion.where(term: [@item.title])
  @search_suggestion.update_attributes(:items_count => +1 )

respond_to do |format|
  if @item.save
    format.html { redirect_to store_items_index_path(current_store), notice: 'Item was successfully created.' }
    format.json { render :template => "stores/items/show", status: :created, location: @item }
  else
    format.html { render :template => "stores/items/new" }
    format.json { render json: @item.errors, status: :unprocessable_entity }
  end
 end
end

然后我找到了对象:

 CACHE SearchSuggestion Load (0.0ms)  SELECT  "search_suggestions".* FROM "search_suggestions" WHERE "search_suggestions"."term" = 'Rolex' LIMIT $1  [["LIMIT", 11]]

但是我收到这个错误:

NoMethodError (undefined method `update_attributes' for #<ActiveRecord::Relation []>
Did you mean?  update_all):

知道我可能做错了什么吗？

Answer 1

where 返回集合。使用 find 或 @search_suggestion.last.update_attributes

@search_suggestion = SearchSuggestion.find_by(term: @item.title.downcase)
if @search_suggestion.present?
  @search_suggestion.increment!(:items_count)
end