如何实现request.args.get（'next'）

Question

我正在尝试实现我在社交媒体平台上看到的功能，在这种情况下，例如，未登录的用户想要发表或发表评论，出现一个登录弹出窗口（在我的情况下为模式），他们预期会登录（（如果没有帐户，该模式还会提示他们注册），然后将他们重定向到该帖子，并且现在可以发表评论。

这是我的家庭路线查看功能。

@app.route("/",methods=['GET','POST'])
@app.route("/home",methods=['GET','POST'])
def home():
    posts = Pitch.query.all()
    comments = Comment.query.all()


    registerForm = Register()
    if registerForm.validate_on_submit():
        hashed_password = bcrypt.generate_password_hash(registerForm.password.data).decode('utf-8')
        user = User(username = registerForm.username.data, email = registerForm.email.data, password = hashed_password)
        db.session.add(user)
        db.session.commit()
        flash(f'Your account has been created! You are now able to login!','success')
        mail_message("Welcome to watchlist","templates/email/welcome_user",user.email,user=user)
        return redirect(url_for('home'))


    form = Login()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        if user and bcrypt.check_password_hash(user.password,form.password.data):
            login_user(user, remember=form.remember.data)
            next_page = request.args.get('next')
            return redirect(next_page) if next_page else redirect(url_for('circles'))

        else:
            flash('Login Unsuccessful. Please check email and password','danger')

    return render_template('home.html', title='login',form=form, registerForm=registerForm ,posts=posts, comments=comments)

这是我个人的帖子查看功能

@app.route("/post/<int:post_id>",methods=['GET','POST'])
def post(post_id):
    review= CommentForm()
    comments = Comment.query.all()
    post = Pitch.query.get_or_404(post_id)
    if review.validate_on_submit():
        comment = Comment(body= review.comment.data,post_id=post.id )
        db.session.add(comment)
        db.session.commit()
        flash('Your post has been created!','success')
        return redirect(url_for('post',post_id=post.id))
    return render_template('post.html',title = post.title, post=post,review=review, comments = comments )

这是我的主页模板摘要：

 {% for post in posts %}
      <div id="homejumbotron" class="jumbotron">
        <div class="container-fluid">
          <div class="row">
            
                <img id="avatar" src="{{ url_for('static',filename='images/' + post.author.image_file) }}" alt=""
                class="rounded-circle col-md-2">
            
            <div id="postintro" class="col-md-10 ">
                <a id="authorname" href="#" class="row mr-2">{{post.author.username}}</a>
              <small class="text-muted row" id="date">
                {{post.date_posted.strftime('%Y-%m-%d')}}
              </small>
              
            </div>
          </div>
        </div>
        
        
          <hr>
          
          <a id="title" href="{{url_for('post',post_id=post.id)}}">{{ post.title }}</a>
        <div class="footer">
            <p class="article-content">{{ post.content }}</p> 
        </div>
        <hr>
        {% if current_user.is_authenticated %}
        <a href="{{url_for('post',post_id=post.id)}}"><i class="far fa-comment-alt"></i><small>Leave review</small></i></a> 
            {% else %}
    <!--if not authenticated,pop up login modal,then redirect back to the post you were trying to view-->
         <a href="{{url_for('post',post_id=post.id)}}" data-toggle="modal" data-target="#modalLoginForm"><i class="far fa-comment-alt"></i><small>Leave review</small></i></a> 
   
            {% endif %}
      </div>
      {%endfor%}

由于模态表单提交会重定向到圈子模板，因此当前直接将其重定向到我的圈子模板。对此有何建议？