Typeahead.js无法获取产品ID？

我被这个问题困扰好久了......我的问题是我无法检索所选产品的id，一直提示值=0。我的代码：

$("#recherche").typeahead({
    onSelect: function(item) {
        alert(item.value); // = 0
    },
    ajax: {
        url: "/personne/autocompletation",
        displayField: "nomComplet",
        triggerLength: 1,
        method: "POST",
        dataType: "JSON",
        preDispatch: function (query) {
            return {
                query: query
            }
        }
    },
});

HTML代码：

<li class="active" data-value="0"><a href="#"><strong>C</strong>alloway</a></li>

Try this

$("#recherche").typeahead({
    source: function(query, process){
     $.ajax({
        url: "/personne/autocompletation",
        displayField: "nomComplet",
        triggerLength: 1,
        method: "POST",
        dataType: "JSON",
        success: function (data) {
           console.log(data);
        }
    });
    }

});