如何使用flask.jsonify和在flask路由中呈现模板

问题描述

是否可以渲染模板并在同一路径中使用flask.jsonify?

Is it possible to render a template and use flask.jsonify in the same route?

@app.route('/thankyou')
def thankyou():
    db = get_db()
    summary_cursor = db.execute('SELECT * FROM orders JOIN order_items USING (transaction_id) WHERE orders.transaction_id = (SELECT MAX(transaction_id) FROM orders)')
    summary = summary_cursor.fetchall()
    data = map(list, summary)
    print data
    return render_template('thankyou.html', summary = json.dumps(data))

现在，我正在使用json.dumps序列化我的数据，但是这样做有些奇怪.我想使用jsonify，因为当我这样做时，我会得到一个非常漂亮的输出，似乎可以更好地与之配合使用:

Right now I am using json.dumps for serializing my data, but it does some weird stuff to it. I would like to use jsonify, because when I do this I get a really pretty output that seems better to work with:

@app.route('/thankyou')
def thankyou():
    db = get_db()
    summary_cursor = db.execute('SELECT * FROM orders JOIN order_items USING (transaction_id) WHERE orders.transaction_id = (SELECT MAX(transaction_id) FROM orders)')
    summary = summary_cursor.fetchall()
    data = map(list, summary)
    print data
    return jsonify(summary = data)

有什么办法可以将两者结合起来吗?

Is there any way to combine the two?

推荐答案

1. 如果在不同情况下需要在一条路径中返回不同的响应对象:render_template返回已转换为有效Response的unicode和jsonify已经返回Response的对象，因此可以同时使用在同一条路线上:

1. If you need return different response objects in one route for different cases: render_template return unicode that transform to valid Response and jsonify return already Response object, so you can use both in same route:

@app.route('/thankyou')
def thankyou():
    db = get_db()
    summary_cursor = db.execute('SELECT * FROM orders JOIN order_items USING (transaction_id) WHERE orders.transaction_id = (SELECT MAX(transaction_id) FROM orders)')
    summary = summary_cursor.fetchall()
    data = map(list, summary)
    print data
    if request.args['type'] == 'json':
        return jsonify(summary = data)
    else:
        return render_template('thankyou.html', summary=data))

如果需要在模板中呈现json:可以在模板中使用安全的tojson过滤器.看到我的另一个答案: https://stackoverflow.com/a/23039331/880326 .

If you need render json in template: you can use safe tojson filter in template. See my another answer: https://stackoverflow.com/a/23039331/880326.

如果您需要返回带有渲染模板值的json:您可以隐式渲染每个模板并为响应字典或列表设置值，则只需使用jsonify.

If you need return json with rendered template values: you can implicitly render each template and set value for response dict or list, then just use jsonify.

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