15

这个 select2jquery 库看起来很棒。有一个Rails gem，但它在文档上非常简单。我想使用自动完成生成一个简单的多重下拉菜单。我怎么做？

这是我的 simple_form_for 调用：

<%= f.input_field :neighborhood_names, url: autocomplete_neighborhood_name_searches_path, as: :autocomplete, data: { delimiter: ',', placeholder: "Where do you want to live?"}, multiple: true, id: "selectWhereToLive", class: "span8" %>

我已经成功安装了select2-railsgem，但不太确定如何让它工作。

我将此添加到我的home.js.coffee文件中：

jQuery ->
    $('#selectWhereToLive').select2()

我收到了这个错误：

Uncaught query function not defined for Select2 selectWhereToLive

想法？

编辑1：

上面的simple_form_for调用正在生成这个 HTML：

<input class="autocomplete optional span8" data-autocomplete="/searches/autocomplete_neighborhood_name" data-delimiter="," data-placeholder="Where do you want to live?" id="selectWhereToLive" multiple="multiple" name="search[neighborhood_names][]" size="30" type="text" url="/searches/autocomplete_neighborhood_name" value="" />

表示id属性设置正确。

编辑 2 - 更新

正如@moonfly 建议as: :select的那样，我尝试添加f.input_field-as: :autocomplete包括和不包括在内。

没有生成的 HTMLas: :autocomplete是这样的：

<input name="search[neighborhood_names][]" type="hidden" value="" /><select class="select optional span8" data-delimiter="," data-placeholder="Where do you want to live?" id="selectWhereToLive" multiple="multiple" name="search[neighborhood_names][]" url="/searches/autocomplete_neighborhood_name"><option value="true">Yes</option>
<option value="false">No</option></select>

它预填充了 2 个选项值“是”和“否”。不太清楚为什么，但这就是它的作用。

更新

所以我将 jquery 选择器更改为查找input#ID，然后忘记了。所以我将其设置回来，现在它正在生成选择框 - 但它给了我这两个是和否选项。不太清楚它为什么这样做。它没有从我的url属性中返回值。

编辑 3

@harish-shetty 的建议似乎奏效了。但是现在，在它通过自动完成并使用 select2 菜单成功找到记录后，它绕过了我在search.rb模型上使用的 setter 方法。

基本上，我想要发生的是，一旦用户完成填写表格 - 我拥有他们想要的社区的所有 ID/名称，我想search_neighborhoods为这些 ID 创建一个新记录。

所以这些是我有的方法：

Search.rb

  def neighborhood_names
    neighborhoods.map(&:name).join(',')
  end

  # we need to put [0] because it returns an array with a single element containing
  # the string of comma separated neighborhoods
  def neighborhood_names=(names)
    names[0].split(',').each do |name|
      next if name.blank?
      if neighborhood = Neighborhood.find_by_name(name)
        search_neighborhoods.build neighborhood_id: neighborhood.id
      end
    end
  end

我的SearchController.rb

  def autocomplete_neighborhood_name
    @neighborhood = Neighborhood.select("id, name").where("name LIKE ?", "#{params[:name]}%").order(:name).limit(10)

    respond_to do |format|
      format.json { render json: @neighborhood , :only => [:id, :name] }
    end    
  end

这就是请求现在的样子——这表明没有search_neighborhood创建记录：

Started POST "/searches" for 127.0.0.1 at 2013-03-06 04:09:55 -0500
Processing by SearchesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"7SeA=", "search"=>{"boro_id"=>"", "neighborhood_names"=>"1416,1394", "property_type_id"=>"", "min_price"=>"", "max_price"=>"", "num_bedrooms"=>"", "num_bathrooms"=>""}}
  Neighborhood Load (0.5ms)  SELECT "neighborhoods".* FROM "neighborhoods" WHERE "neighborhoods"."name" = '1' LIMIT 1
   (0.3ms)  BEGIN
  SQL (0.8ms)  INSERT INTO "searches" ("amenity_id", "boro_id", "created_at", "keywords", "listing_type_id", "max_price", "min_price", "neighborhood_id", "num_bathrooms", "num_bedrooms", "property_type_id", "square_footage", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13) RETURNING "id"  [["amenity_id", nil], ["boro_id", nil], ["created_at", Wed, 06 Mar 2013 09:09:55 UTC +00:00], ["keywords", nil], ["listing_type_id", nil], ["max_price", nil], ["min_price", nil], ["neighborhood_id", nil], ["num_bathrooms", nil], ["num_bedrooms", nil], ["property_type_id", nil], ["square_footage", nil], ["updated_at", Wed, 06 Mar 2013 09:09:55 UTC +00:00]]
   (32.2ms)  COMMIT
Redirected to http://localhost:3000/searches/29
4

3 回答 3

24

select2 插件支持自动完成。您可以按如下方式使用本机自动完成：

<%= f.input_field :ac_neighborhood_ids, 
      data: { 
        placeholder: "Where do you want to live?",
        saved: @search.neighborhoods.to_json,
        url: autocomplete_neighborhood_name_searches_path
      }, 
      input_html:  { class: "span8 ac-select2" }
%>

Javascript

$(document).ready(function() {  
  $('.ac-select2').each(function() {
    var url = $(this).data('url'); 
    var placeholder = $(this).data('placeholder'); 
    var saved = jQuery.parseJSON($(this).data('saved'));
    $(this).select2({
      minimumInputLength: 2,
      multiple: true,
      placeholder : placeholder,
      allowClear: true,
      ajax: {
        url: url,
        dataType: 'json',
        quietMillis: 500,
        data: function (term) {
          return {
            name: term
          };
        },
        results: function (data) {
          return {results: data};
        }
      },

      formatResult: function (item, page) {
        return item.name; 
      },

      formatSelection: function (item, page) {
        return item.name; 
      },

      initSelection : function (element, callback) {
        if (saved) {
          callback(saved);
        }
      }

    });
  });
});

确保 at 处的操作autocomplete_neighborhood_name_searches_path返回一个 json 哈希数组。每个散列应该包含id和name字段。自动完成的术语是通过查询参数传递的name。

  def autocomplete_neighborhood_name
    @neighborhood = Neighborhood.select("id, name").where("name LIKE ?", "#{params[:name]}%").order(:name).limit(10)

    respond_to do |format|
      format.json { render json: @neighborhood , :only => [:id, :name] }
    end    
  end

您的搜索模型：

class Search

  attr_accessor :ac_neighborhood_ids

  has_many :search_neighborhoods
  has_many :neighborhoods, through: :search_neighborhoods

  def ac_neighborhood_ids
    neighborhood_ids.join(",")
  end

  def ac_neighborhoods
    neighborhoods.map{|n| {:id => n.id, :name => n.name}}
  end

  def ac_neighborhood_ids=(ids)
    search_neighborhoods.clear # remove the old values
    ids.split(',').select(&:present?).map do |neighborhood_id|
      search_neighborhoods.build neighborhood_id: neighborhood_id
    end
  end

end
于 2013-03-06T05:58:36.237 回答
1

我相信您需要附加选择以选择标签（然后它从中读取数据）或输入隐藏标签，然后您需要提供“查询”功能。在您的情况下，它附加到输入标签，因此寻找查询功能。尝试设置as: :select您的f.input_field通话。

于 2013-02-28T23:01:06.770 回答
0

用作： :select with collection 是 select2 的常规方式。在 select2 上绑定自动完成是一个 javascript 问题。

这是我的代码示例。但没有自动完成功能。 https://gist.github.com/kuboon/f692d9a844c0ff5877c8

于 2015-11-20T06:35:56.227 回答