我正在学习如何创建rails搜索栏。我有一个名为电影的模特。我想按标题搜索电影并显示结果。我在" new"查看,不是"索引。"我也在我的结果上使用will_paginate。目前,即使电影存在,我的搜索也没有结果。如果我不进行搜索,我仍会看到我的所有电影......但显然,我还需要搜索功能。有人可以帮忙吗?
新电影观点:
<div class="row">
<div class="col-xs-12">
<h2 class="white">Home</h2>
<hr />
<h4 class="white">Add Movie</h4>
<%= form_for @movie, class: 'form-horizontal' do |m| %>
<div class="form-group">
<label for="title" class="white">Title: </label><br/>
<%= m.text_field :title, class: 'form-control' %>
</div>
<div class="form-group">
<label for="title" class="white">Year: </label><br/>
<%= m.text_field :year, class: 'form-control' %>
</div>
<div class="form-group">
<%= m.submit %>
<div class="form-group">
<% end %>
</div>
</div>
<hr />
<div class="row">
<div class="col-xs-12">
<h4 class="white">Database</h4>
<%= form_tag new_movie_path, :method=> 'get' do %>
<%= text_field_tag :search, params[:search] %>
<%= submit_tag "Search" %>
<% end %>
<br />
<% if @movies.exists? %>
<div class="bg_white">
<table class="table table-hover table-striped">
<tr>
<th>
Title
</th>
<th>
Status
</th>
<th>
Year
</th>
<th>
Delete
</th>
<th>
Edit
</th>
</tr>
<% @movies.each do |m| %>
<tr>
<td>
<%= link_to m.title, new_movie_rental_path(m) %>
</td>
<td>
<%= m.status %>
</td>
<td>
<%= m.year %>
</td>
<td>
<%= link_to "Delete", movie_path(m), method: :delete %>
</td>
<td>
<%= link_to "Edit", edit_movie_path(m) %>
</td>
</tr>
<% end %>
</table>
</div>
<%= will_paginate @movies, class: 'white' %>
<% else %>
<p class="white">No movies have been entered</p>
<% end %>
</div>
</div>
<div class="row">
<div class="col-xs-12">
<hr />
<%= link_to "Add Customer", new_customer_path, class: 'white' %>
</div>
</div>
<br /><br />
电影模特:
class Movie < ApplicationRecord
has_many :rentals, dependent: :destroy
def status
if self.rentals.empty?
return "In Stock"
else
self.rentals.order(borrowed_on: :desc).each do |x|
if !x.returned_on.nil?
return "In Stock"
else
return "Rented"
end
end
end
end
def self.search(search)
if search
@movies = Movie.where(["title","%#{[:search]}%"])
else
all
end
end
end
电影控制器
def new
@movie = Movie.new
@movies = Movie.search(params[:search]).order(title: :asc).paginate(:page => params[:page], :per_page => 15)
end
答案 0 :(得分:1)
我说问题就在于你作为搜索范围的这个类方法:
def self.search(search)
if search
@movies = Movie.where(["title","%#{[:search]}%"])
else
all
end
end
我猜你试图将搜索参数插入到查询中,但是在这种情况下使用#{}你传递符号搜索而不是插值。因此,您的查询最终为SELECT 1 AS one FROM "movies" WHERE (title)
。但更重要的是,通过直接插入查询,您将非常容易受到SQL注入的攻击。如果用户在')DROP TABLE MOVIES ('
之类的搜索字段中输入内容,该怎么办?我会像这样重写它:
def self.search(search = nil)
if search
Movie.where('title LIKE :search', search: "%#{search}%")
else
Movie.scoped
end
end
另请注意,当搜索为空时,我将如何返回Movie.scoped而不是全部;返回一个关系,.all返回一个电影对象数组,如果你要调用它上面的order
和其他链,你就不想要了。
读取sql注入和参数插值: http://rails-sqli.org/#where http://api.rubyonrails.org/v5.0.0.1/classes/ActiveRecord/QueryMethods.html#method-i-where