Question

我正在尝试在按下提交时从文本字段中获取表单数据，因此我可以将其放入json格式并将json数据作为另一个页面访问localhost:5000/info。每次我尝试使用request.form.get('<id>')访问数据时，它只返回一个空字典。我读了stackoverflow上的其他帖子试图找出问题，但没有一个解决方案似乎工作。如果可能的话，我希望避免使用烧瓶以外的模板或模块。

这是我的python代码

from flask import Flask, request, jsonify, redirect

app = Flask(__name__)

numCarsEast = None
numCarsWest = None
numCarsSouth = None
numCarsNorth = None


@app.route('/info.json', methods=['GET', 'POST'])
def getInfo():
    if  request.method == 'GET':
        lightEast = {}
        lightWest = {}
        lightNorth = {}
        lightSouth = {}
        intersection1 = {}
        lightEast['cars'] = numCarsEast
        lightWest['cars'] = numCarsWest
        lightNorth['cars'] = numCarsNorth
        lightSouth['cars'] = numCarsSouth
        intersection1['eastLight'] = lightEast
        intersection1['westLight'] = lightWest
        intersection1['northLight'] = lightNorth
        intersection1['southLight'] = lightSouth
        return jsonify(intersection=intersection1)

@app.route('/cars', methods=['GET', 'POST'])
def cars():
    if request.method == 'POST':
        numCarsEast = request.form.get('eastLightInt1', None)
        numCarsWest = request.form.get('westLightInt1', None)
        numCarsNorth = request.form.get('northLightInt1', None)
        numCarsSouth = request.form.get('southLightInt1', None)
        print(str(numCarsEast) + ' east')
        print(str(numCarsWest) + ' west')
        print(str(numCarsNorth) + ' north')
        print(str(numCarsSouth) + ' south')
        return 'done'
    return open('./carForm.html').read()

if __name__ == '__main__':
    app.debug = True
    app.run()

这是HTML

<body>
    <form method='POST'>
        <H2>
            Intersection 1
        </h2>
        <label>
            East Light
        </label>
        <input type=text id='eastLightInt1' name='eastLightInt1' />
        <label>
            West Light
        </label>
    <input type=text id='westLightInt1' name='westLightInt1' />
    <br />
    <label>
      North Light
    </label>
    <input type=text id='northLightInt1' name='northLightInt1' />
    <label>
      South Light
    </label>
    <input type=text id='southLightInt1' name='southLightInt1' />
    <br />
    <input type=submit value=Submit>
  </form>
  </body>

Answer 1

我尝试了你的代码，它对我有用。

我只需在global中添加cars()即可在页面/info.json上获得结果

def cars():
    global numCarsEast, numCarsWest, numCarsSouth, numCarsNorth

使用flask和python从html表单获取表单数据

1 个答案: