Ruby on Rails:使用pg_search和will_paginate搜索后转到下一页时，出现404未找到错误

Question

我遇到了一个奇怪的错误，搜索后转到下一页将导致 404 未找到错误。但是如果我不搜索，分页效果很好。

路线.rb

resources :activities do
post :search, on: :collection
end
match "/403", to: "errors#error_403", via: :all
match "/404", to: "errors#error_404", via: :all
match "/422", to: "errors#error_422", via: :all
match "/500", to: "errors#error_500", via: :all
get :ie_warning, to: 'errors#ie_warning'
get :javascript_warning, to: 'errors#javascript_warning'
get :pwreset, to: "pages#pwreset"
get :activities, to: "activities#index"
get :home, to: "pages#home"
root to: "pages#home"

控制器.rb

@@page_size = 3
# GET /activities
def index
@activities = Activity.paginate(:page => params[:page], :per_page => @@page_size)
end
# POST /products/search
def search
if params[:search][:title].present?
@activities = Activity.search_activities(params[:search][:title]).paginate(:page => params[:page], :per_page => @@page_size)
render :index
else
@activities = Activity.paginate(:page => params[:page], :per_page => @@page_size)
end
end

html.haml

- @activities.each do |activity|
.row
.col-md-8
= link_to activity.title, activity
.col-md-2
%p= activity.publisher
.col-md-2
%p= activity.created_at.to_date
.force-to-bottom
.text-center
= will_paginate @activities

= simple_form_for :search, url: search_activities_path, method: :post do |f|
.form-inline
= f.input :title, label: false, placeholder: 'search...'
= button_tag(type: 'submit', class: "btn btn-primary") do
%span.glyphicon.glyphicon-search{"aria-hidden" => "true"}
%span.glyphicon.glyphicon-remove{"aria-hidden" => "true"}
= link_to 'clear filter', activities_path

错误信息

Started GET "/activities/search?page=2" for ::1 at 2018-04-16 04:39:57 +0100
Processing by ActivitiesController#show as HTML
Parameters: {"page"=>"2", "id"=>"search"}
Activity Load (17.9ms)  SELECT  "activities".* FROM "activities" WHERE "activities"."id" = $1 LIMIT $2  [["id", 0], ["LIMIT", 1]]
Rendering errors/error_404.html.haml within layouts/application
Haml::TempleEngine: Option :ugly is invalid
Rendered errors/error_404.html.haml within layouts/application (6.2ms)
Haml::TempleEngine: Option :ugly is invalid
Haml::TempleEngine: Option :ugly is invalid
Rendered layouts/_environment_notice.html.haml (2.0ms)
Completed 404 Not Found in 245ms (Views: 162.2ms | ActiveRecord: 74.7ms)

任何人都可以帮忙，经过几个小时的研究，我仍然真的不知道这个错误是怎么回事

Answer 1

搜索时，参数通过 POST 方法 (method: :post提交。当您单击下一页时，您通过 GET 请求页面，但是浏览器不会通过 GET 发送搜索参数，并且没有路由get :search因此使用 show 操作来引导 404 页面。

虽然可以使用will_paginate POST，但不建议这样做。

参 https://github.com/mislav/will_paginate/wiki/Simple-search

：

创建搜索表单时，请确保其方法GET

<% form_tag request.path, :method => 'get' do %>
<% content_tag :label do %>
Search term:
<%= text_field_tag :search, params[:search] %>
<% end %>
<% end %>

如果您的表单的操作是 POST(或任何其他 HTTP 方法)，则 搜索词不会应用于后续页面链接。换句话说， 当您点击"下一页"或任何其他页面链接时，搜索 参数将丢失。

无论如何，使用 GET 发布的搜索表单是更好的做法。其中之一 直接的好处是用户可以为搜索结果添加书签。 缓存是另一个好处：浏览器、代理等都乐于缓存 作为 GET 请求结果的内容。

Answer 2

帖子 ：搜索， 在： ：集合 但是你的要求是得到的？