Question

我有一个应用程序，允许用户输入，编辑和搜索数据库中的项目。

在我的搜索功能中，您可以通过在搜索中添加参数来进行复杂的搜索。

def self.like(text); "%#{text}%"; end

  def self.search(search_archive, search_client, search_status, search_fullname)
    # start with a scoped query, to apply more scopes on it afterwards
    _projects = Project.scoped 
    # then, for each of the parameters, apply the scope only if present

    if search_archive.present?
      _projects = _projects.where ['archive LIKE ?', like(search_archive)] 
    end
    if search_client.present?
      _projects = _projects.where ['client LIKE ?', like(search_client)] 
    end

     if search_status.present?
      _projects = _projects.where ['status LIKE ?', like(search_status)]
    end

if search_fullname.present?
      _projects = _projects.where ['fullname LIKE ?', like(search_fullname)]
    end
    # now you have applied only the present scopes. return the result, and watch 
    # the query as it executes.

    _projects

  end

现在我最近添加了归档项目的选项，它作为布尔值进入项目表。

我知道我的搜索功能是错误的，因为我认为我不能按照他的方式处理布尔值。

if search_archive.present?
          _projects = _projects.where ['archive LIKE ?', like(search_archive)] 
        end

这是错误：

PG::Error: ERROR:  operator does not exist: boolean ~~ unknown
LINE 1: SELECT COUNT(*) FROM "projects"  WHERE (archive LIKE '%{"{:c...

有什么想法吗？提前谢谢。

更新

更改为以下建议，

if search_archive.present?
  _projects = _projects.where(:archive => search_archive)
end

我收到此错误：

PG::Error: ERROR:  missing FROM-clause entry for table "archive"
LINE 1: SELECT COUNT(*) FROM "projects"  WHERE "archive"."{:class=>"...
                                               ^
: SELECT COUNT(*) FROM "projects"  WHERE "archive"."{:class=>""archive""}" = '1'

以下是我的搜索操作：

def search


    @search = params[:archive], params[:client], params[:status], params[:fullname]

    @project_search = Project.search(*@search).order(sort_column + ' ' + sort_direction).paginated_for_index(per_page, page)

    @search_performed = !@search.reject! { |c| c.blank? }.empty? 

  @project = Project.new(params[:project])


respond_to do |format|
      format.html # search.html.erb
      format.json { render :json => @project }
    end

end

添加搜索视图的一部分

<%= form_tag search_path, method: :get do %>

<% if current_user.try(:admin?) %>
Archive:
<%= check_box :archive, :class => "archive" %></H2>
<% end %>
<% if !current_user.try(:admin?) %>
<%= hidden_field :archive, :value => false %>
<% end %>

<div class="client">
Client : 
<%= select(@projects, :client, Project.order("client").map{|p| [p.client]}.uniq, :prompt => "-Any-", :selected => params[:client]) %></br>
</div>

<div class="buttons">
<div id="search_button">
<%= submit_tag "Search", name: nil, :class => "button" %>
</div>

<% end %>

说明

如果我是管理员，并且未选中存档复选框，我希望查看所有未存档的项目。如果我检查一下，我只想查看存档的那些，包含在我搜索的其他参数中。

如果我是普通用户，我应该无法看到存档复选框，我所做的每一次搜索都应该在幕后虚假的项目上进行。

Answer 1

如果archive是一个布尔值，并且你想在其上搜索true或false，并且search_archive也是一个布尔值，那么这就是你需要做的：

if search_archive.present?
  _projects = _projects.where(:archive => search_archive)
end

更新：

您的复选框语法错误，需要类似于：

check_box("project", "archive", {:class => 'archive'})

Answer 2

如果archive是布尔值，请添加类似下面的内容

if search_archive.present?
  _projects = _projects.where(:archive => search_archive != "false")
end

更改

<% if current_user.try(:admin?) %>
Archive:
<%= check_box :archive, :class => "archive" %></H2>
<% end %>
<% if !current_user.try(:admin?) %>
<%= hidden_field :archive, :value => false %>
<% end %>

要

<% if current_user.try(:admin?) %>
  Archive: <%= check_box_tag :archive, true, false, :class => "archive" %></H2>
<% else %>
  <%= hidden_field :archive, :value => false %>
<% end %>

Ruby on Rails：使用布尔搜索 - postgres

2 个答案: