在两个Flask路线之间传递(或"持久的")对象?

时间:2017-12-29 19:14:45

标签: python flask

我试图将在一条路线(/index)上生成的对象传递给另一条路线(/ello),这样我就不必进行重复查询。

/index路线...

上生成对象
@app.route('/',methods=['GET'])
def index(x=None,y=None):
        persons = Person.query.filter(Person.id != current_user_person_id).all()
        person1 = random.choice(persons)
        person2 = random.choice(persons)
        x,y = pair_generator(person1,person2)

    return render_template('index.html',x=x,y=y)

...并在/ello路线上操纵:

@app.route('/ello',methods=['POST'])
def ello():
    winner_id = int(request.form['winner_id'])
    winner_score = int(request.form['winner_score'])
    loser_id = int(request.form['loser_id'])
    loser_score = int(request.form['loser_score'])

    # ELO CALCULATIONS GO HERE; OMITTED FOR BREVITY

    winner_object = Person.query.filter_by(id=winner_id).first()
    loser_object = Person.query.filter_by(id=loser_id).first()
    db.session.commit()

    return redirect(url_for('index'))

以下是index.html的相关部分:

<form action="{{url_for('ello')}}" method="post">
  <input type="submit" name="nickname" value="{{x.nickname}}"  />
  <input type="hidden" name="winner_id" value="{{x.id}}"  />
  <input type="hidden" name="winner_score" value="{{x.score}}"  />
  <input type="hidden" name="loser_id" value="{{y.id}}"  />
  <input type="hidden" name="loser_score" value="{{y.score}}"  />
</form>
<form action="{{url_for('ello')}}" method="post">
  <input type="submit" name="nickname" value="{{y.nickname}}"  />
  <input type="hidden" name="winner_id" value="{{y.id}}"  />
  <input type="hidden" name="winner_score" value="{{y.score}}"  />
  <input type="hidden" name="loser_id" value="{{x.id}}"  />
  <input type="hidden" name="loser_score" value="{{x.score}}"  />
</form>

如您所见,我正在查询Person表两次。是否可以在路由之间传递对象? (或者&#34;坚持&#34;他们以某种方式?)这样,我可以允许/ello路由访问和操作在/index中创建的两个Person对象。

真的,我希望能够做到这样的事情:

<form action="{{url_for('ello', winner_object=x, loser_object=y)}}" method="post">
  <input type="submit" value="{{x.nickname}}"  />
</form>
<form action="{{url_for('ello', winner_object=y, loser_object=x)}}" method="post"
  <input type="submit" value="{{y.nickname}}"  />
</form>

...但这当然会传递字符串,而不是对象:

http://127.0.0.1:5000/ello?  
winner_object=<app.Person+object+at+0x1062b1290>&loser_object=<app.Person+object+at+0x1062b1490>

1 个答案:

答案 0 :(得分:0)

我遇到了类似的问题,无法确定正确的方法,因此创建了一个会话,然后在每个页面上都可以使用此变量。