在 Flask 中使用 jQuery 自动完成 [英] Using jQuery autocomplete with Flask

问题描述

这个问题以前有人问过，我想我已经做了我在那里看到的，但我真的不知道我做错了什么.我对 jQuery 了解不多，但我会尽力解释我正在尝试做什么.

This question has been asked before, and I think I've done what I've seen there, but I don't really know what I'm doing wrong. I don't know a lot about jQuery, but I'll do my best to explain what I'm trying to do.

我想根据来自数据库的查询自动完成，所以我的模板中有这个:

I want to autocomplete based on a query from a database, so I have this in my template:

<script type="text/javascript">
    $(function() {
        $( "#function_name" ).autocomplete({
            source: '{{url_for("autocomplete")}}',
            minLength: 2,
        });
    });
</script>

<form id="function_search_form" method="post" action="">
    {{form.function_name}}
</form>

表单是由这个 Flask 表单类生成的:

The form is generated by this Flask form class:

class SearchForm(Form):
    function_name = TextField('function_name', validators = [Required()])

这里是自动完成功能:

@app.route('/autocomplete')
def autocomplete():
    results = []
    search = request.args.get('term')
    results.append(db.session.query(Table.Name).filter(Table.Name.like('%' + search + '%')).all())
    return dumps(results)

因此 jQuery 应该转到自动完成功能并获取一些 JSON 以进行自动完成.至少我认为这就是正在发生的事情.我在这里做错了什么?

So the jQuery should go to the autocomplete function and get some JSON back to autocomplete with. At least I think that's what's going on. What am I doing wrong here?

推荐答案

更新:

autocomplete 如果你给它一个 URL，它不会自动处理 Ajax 请求，你必须手动完成:

autocomplete doesn't handle the Ajax request automatically if you give it a URL, you must do it manually:

$(document).ready(function() {
    $.ajax({
        url: '{{ url_for("autocomplete") }}'
    }).done(function (data) {
        $('#function_name').autocomplete({
            source: data,
            minLength: 2
        });
    });
}

您可能需要修改处理返回数据的方式，具体取决于 API 返回的内容.

You might have to modify the way you handle the returned data, depending on what your API returns.

更新 2:

您在服务器端的查询结果如下所示:

The result of your query on the server side looks like this:

[[["string1"], ["string2"], ... ["stringn"]]]

您可以在发送之前将其展平:

You can flatten it before sending it:

import itertools
flattened = list(itertools.chain.from_iterable(result[0]))

但是您可能可以改进您的查询以直接返回字符串列表.如果您需要这方面的帮助，则需要发布整个代码.

But you could probably improve your query to return a list of strings directly. You will need to post the whole code if you want help with that.

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