typeahead.js：返回空查询的所有Bloodhound记录

问题描述

我使用猎犬获取一些预先输入的数据。我的猎犬对象：

i use bloodhound to get some data for typeahead. My Bloodhound Object:

var lastAdresses = new Bloodhound({
  datumTokenizer: Bloodhound.tokenizers.obj.whitespace('value'),
  queryTokenizer: Bloodhound.tokenizers.whitespace,
  prefetch: {
    url: '/_dev_data_sources/last_adresses_json.html',
  },
  limit: 20
});



lastAdresses.initialize().done(function () {
  var query = "L";
  lastAdresses.get(query, function(suggestions) {
  console.log(suggestions);
  });
});

当我的查询在示例中为L或其他字符串时，此工作正常。但是当我的查询是时，我希望bloodhound返回所有可用的记录。在我的例子中，它什么都不返回。

This works fine, when my query is "L" like in the example, or another string. But I want bloodhound to return all available Records, when my query is "". In my example, it returns nothing.

我看到，那个猎犬有一个过滤器参数，但我不知道如何使用它。

I saw, that bloodhound has a filter argument, but I don`t know how to use this.

有人可以帮助我吗？

推荐答案

我认为可能有更好的方法可以做到这一点。但它仍然取决于可能改变的内部猎犬实施。

I think there might be a better way of doing this. But it still depends on internal bloodhound implementation that may change.

var searchEngine = new Bloodhound({...});
function searchWithDefaults(q, sync) {
  if (q === '') {
    sync(searchEngine.index.all());
  } else {
    searchEngine.search(q, sync);
  }
}
$("#typeahead").typeahead({
  minLength : 0,
}, {
  name : 'typeahead',
  source : searchWithDefaults
});

此代码利用名为及其功能 all（）返回Bloodhound存储的完整数据列表。

This code takes advantage of implementation of Bloodbound internal search engine called SearchIndex and its function all() that returns full list of data stored by Bloodhound.

答案的启发：

• joews answer

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