在ArticlesController中的ActiveRecord :: PreparedStatementInvalid

Posted 2023-01-21

我正在尝试使用Ruby on Rails创建一个迷你博客。当我想在articles_controller.rb上添加搜索操作时遇到此错误。搜索表单位于导航栏。如果搜索表单为空，则没有错误。如果我在搜索表单中输入了某些内容，则会出现此错误wrong number of bind variables (2 for 1) in: text LIKE ? or title LIKE。

错误日志

开始获取“/ articles / search？utf8 =％E2％9C％93＆search = kawaii＆commit = Search”for 127.0.0.1 at 2019-02-21 13:21:02 +0900（0.4ms）SELECT“schema_migrations”。“version” FROM“schema_migrations”ORDER BY“schema_migrations”。“version”ASC↳/Users/igarashinobuo/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-5.2.2/lib/active_record /log_subscriber.rb:98由ArticlesController处理#Search as html参数：“utf8”=>“✓”，“search”=>“kawaii”，“commit”=>“搜索”在14ms内完成500内部服务器错误（ActiveRecord：0.0ms）

ActiveRecord :: PreparedStatementInvalid（错误的绑定变量数（2个为1）：text LIKE？或title LIKE）：

app / models / article.rb：8：在search' app/controllers/articles_controller.rb:23:insearch'

控制器/ articles_controller.rb

def search
    if params[:search].blank?
      @articles = Article.all
    else
      @articles = Article.search(params)
    end
  end

车型/ article.rb

  def self.search(params)
      articles = Article.where("text LIKE ? or title LIKE", "%# 
      params[:search]%", "%#params[:search]%") if params[:search].present?
      articles
  end
end

意见/文章/ search.html.erb

<div class="row">
  <div class="col"></div>
  <div class="col-md-10">
    <h1>
      記事リスト</h1>
    <p>
      <%= link_to '新規記事作成', new_article_path, class:'btn btn-lg btn-info' %>
    </p>

    <table class="table table-hover table-striped table-responsive-xs table-info">
      <thead>
        <tr>
          <th>Title</th>
          <th>Text</th>
          <th colspan="3">Editing Options</th>
        </tr>
      </thead>
      <tbody>
        <% @articles.each do |article| %>
          <tr>
            <td>
              <%= article.title %>
            </td>
            <td>
              <%= truncate(article.text, length: 75) %>
            </td>
            <td>
              <%= link_to 'SHOW', article_path(article), class: 'btn btn-sm btn-info' %>
            </td>
            <td>
              <%= link_to 'Edit', edit_article_path(article), class: 'btn btn-sm btn-warning' %>
            </td>
            <td>
              <%= link_to 'Delete',article_path(article), class: 'btn btn-sm btn-danger', method: :Delete, data: confirm: '本当に削除しますか ?' %>
            </td>
          </tr>
        <% end %>
      </tbody>
    </table>
    <p>
      <%= link_to 'Home', welcome_index_path, class: 'btn btn-sm btn-info' %>
    </p>
  </div>
  <div class="col"></div>
</div>

答案

我想你错过了？对于查询的第二个参数：

  def self.search(params)
      articles = Article.where("text LIKE ? or title LIKE ?", "%# 
      params[:search]%", "%#params[:search]%") if params[:search].present?
      articles
  end