Question

我正在使用jQuery UI自动完成。

当我使用局部变量作为源时，它可以工作。

var json = [
            {type: "Utente",label: "Luca XXXX",url: "http://lvh.me:3000/users/4dde465add53e04e5c000001"},

            {type: "Domanda",label: "Luca asdas adsfdsfdsf sdsd",url: "http://lvh.me:3000/questions/luca-asdas-adsfdsfdsf-sdsd"},
    ];

但是当我从另一个文件返回相同的源时，它不起作用。我在firebug中找到了JSON对象，它看起来与我的局部变量json相同。

代码如下：

$( ".query-input" ).autocomplete({
        minLength: 3,
        source: "/search.json",
        select: function( event, ui ) { window.location = ui.item.url }
    })
    .data( "autocomplete" )._renderItem = function( ul, item ) {
        return $( "<li></li>" )
            .data( "item.autocomplete", item )
            .append( "<a href=" + item.url + ">"+ item.label +"</a><span>" + item.type + "</span>" )
            .appendTo( ul );
    };

这是search.json.erb文件：

[<% @results.each do |r| %>
<% if r.is_a? User %>
    {type: "Utente",label: <%= r.name.to_json.html_safe %>,url: <%= user_url(r.id).to_json.html_safe %>},
<% elsif r.is_a? Question %>
    {type: "Domanda",label: <%= r.text.to_json.html_safe %>,url: <%= question_url(r.slug).to_json.html_safe %>},
<% elsif r.is_a? Topic %>
    {type: "Argomento",label: <%= r.name.to_json.html_safe %>,url: <%= topic_path(r.id).to_json.html_safe %>},
<% end %>
<% end %>]

有什么问题？

Answer 1

    $( ".query-input" ).autocomplete({
            minLength: 3,
            dataType: 'json',
            source: "/search.json",
            select: function( event, ui ) { window.location = ui.item.url }
})

您应该将dataType称为'json'

Answer 2

~~我认为html_safe不会用双引号字符包装值。~~

编辑：结果html_safe 添加双引号字符。但是，Firebug跟踪中的JSON无效，与您问题中的代码不匹配：

[
    {
        type: "Utente",
        label: "Luca XXXX",
        url: "lvh.me:3000/users/4dde465add53e04e5c000001"; <-- syntax error
    }, {
        type: "Domanda",
        label: "Luca asdas adsfdsfdsf sdsd",
        url: "lvh.me:3000/questions/luca-asdas-adsfdsfdsf-sdsd"; <-- syntax error
    },
]

在url的值之后不应该有分号字符。

Answer 3

问题是错过了回调。自动完成需要回调参数才能正常运行。正确的search.json代码如下：

<%= "#{params[ :callback ]}(" if params[:callback] -%>
[<% @results.each_with_index do |r, i| %>
  <% if r.is_a? User %>
    {
      type: "Utente",
      label: <%= r.name.to_json.html_safe %>,
      url: "<%= user_url(r.id) %>"
    }
  <% elsif r.is_a? Question %>
    {
      type: "Domanda",
      label: <%= r.text.to_json.html_safe %>,
      url: "<%= question_url(r.slug) %>"
    }
  <% elsif r.is_a? Topic %>
    {
      type: "Argomento",
      label: <%= r.name.to_json.html_safe %>,
      url: "<%= topic_path(r.slug) %>"
    }
  <% end %>
  <%= "," unless i == @results.count - 1 %>
<% end %>]
<%= ")" if params[:callback] -%>

jquery ui autocomplete：远程源问题

3 个答案: