Ruby on rails 我的rails应用程序的收藏夹模型
我有一个用户和指南模型 我希望用户能够将一条指南标记为他们最喜欢的,然后查看所有他们最喜欢的指南的列表 不太对。我不确定“收藏夹”操作是否正确添加收藏夹;或者,如果添加正确,则在“收藏夹”视图中显示不正确(因此“显示”操作可能不正确) *控制器*指南\u CONTROLLER.rbRuby on rails 我的rails应用程序的收藏夹模型,ruby-on-rails,ruby-on-rails-3,Ruby On Rails,Ruby On Rails 3,我有一个用户和指南模型 我希望用户能够将一条指南标记为他们最喜欢的,然后查看所有他们最喜欢的指南的列表 不太对。我不确定“收藏夹”操作是否正确添加收藏夹;或者,如果添加正确,则在“收藏夹”视图中显示不正确(因此“显示”操作可能不正确) *控制器*指南\u CONTROLLER.rb def favourite type = params[:type] if type == "favourite" @guideline= Guideline.find_all_by_id(par
def favourite
type = params[:type]
if type == "favourite"
@guideline= Guideline.find_all_by_id(params[:guideline_id])
current_user.favourite_guidelines << @guideline
redirect_to :back, notice: 'You favourited #{@guideline.name}'
elsif type == "unfavourite"
current_user.favourite_guidelines.delete(@guideline)
redirect_to :back, notice: 'Unfavourited #{@guideline.name}'
else
# Type missing, nothing happens
redirect_to :back, notice: 'Nothing happened.'
end
end
def show
@user = User.find_by_profile_name(params[:id])
if @user
@guidelines = @user.favourite_guidelines.all
render action: :show
else
render file: 'public/404', status: 404, formats: [:html]
end
end
end
*ROUTES*ROUTES.rb
get "guidelines/favourite"
get "favourites/show"
*MODEL*user.rb
*MODEL*favorite_guidelines.rb
attr_accessible :guideline_id, :user_id
belongs_to :user
*视图*指南/index.html.erb
<% if current_user %>
<%= link_to "favourite", guidelines_favourite_path(guideline, type: "favourite"), method: "get" %>
<%= link_to "unfavourite", guidelines_favourite_path(guideline, type: "unfavourite"), method: "get" %>
*视图*收藏夹/show.html.erb
<% if @guidelines %>
<% @guidelines.each do |guideline| %>
<div class="well">
<%= link_to guideline.title, guideline %>
<br />
<%= guideline.content %>
<br />
Added <%= time_ago_in_words(guideline.created_at) %> ago
</div>
<% end %>
<% end %>
前加
根据您的评论,以下返回值为nil
:
@guideline= Guideline.find_by_id(params[:guideline_id]) #=> nil
current_user.favourite_guidelines << nil #Gives association mismatch error
在您之前的案例中:
@guideline= Guideline.find_all_by_id(params[:guideline_id]) #=> []
current_user.favourite_guidelines << [] #=> Valid and inserting nothing
@guideline=guideline.find_all_by_id(params[:guideline_id])#=>[]
当前\u user.favorite\u指南有效且不插入任何内容
您可以发布日志中的参数吗<代码>@guideline=guideline。通过_id(参数[:guideline_id])查找_all_;当前用户最喜爱的指南首先在浏览器上打开您的显示页面。然后使用命令$>development.log
清除日志。下一步单击ur链接添加fav。然后打开文件$vim development.log
。您可以看到参数。谢谢-将其更改为“按id查找”会给我一个“ActiveRecord::AssociationTypeMismatch in GuidelinesController#Favorite”-这与关系有关?将其更改为按
查找时不应出现错误。错误是为了别的东西。是否可以使用完整跟踪粘贴精确错误。ActiveRecord::Guidelines中的AssociationTypeMismatch控制器#最喜爱的FavoriteGuideline(#70238325055960)应为,获得NilClass(#70238318357120)Rails.root:/Users/x/Projects/guidelines Application Trace | Framework Trace | Full Trace app/controllers/guidelines|u controller.rb:25:in'favorite'请求参数:{“"方法”=>“获取”,“真实性"令牌”=>“a1z9qajgajgsowekblqbiaq0fcoillwllo4u6malw8y4pk=,“类型”=>“收藏夹”,“格式”=>“23”}我收到了您的错误。这是因为指南。find_by_id(params[:guidline_id])
返回nil
current_user.Favorite_指南感谢您的坚持,现在我得到了:ActiveRecord::AssociationTypeMismatch in guidelines控制器#Favorite FavoriteGuidence(#70238325055960)预期的,获得的指南(#7023832473360)Rails.root:/Users/x/Projects/guidelines Application Trace | Framework Trace | Full Trace app/controllers/guidelines(控制器)controllers(控制器).rb:25"收藏"请求参数{{{"方法=>“获取”,“真实性(令牌=>“a1z9qajgqajgsowekblqbiaqeqe0fcoilllo4u4u6malw8
<%= link_to "favourite", guidelines_favourite_path(guideline_id: guideline.id, type: "favourite"), method: "get" %>
<%= link_to "unfavourite", guidelines_favourite_path(guideline_id: guideline.id, type: "unfavourite"), method: "get" %>
@guideline= Guideline.find_all_by_id(params[:guideline_id]) #=> []
current_user.favourite_guidelines << [] #=> Valid and inserting nothing