Question

我正在使用＆＃39; post＆＃39;提交表单。并使用request.POST将其数据传输到另一个视图，但是当它到达第二个视图时我的querydict不完整。

厂景

def question_filter(request):
    if request.method == 'POST':
        print('before validation', request.POST)
        request.session['question_data'] = request.POST
        return HttpResponseRedirect(reverse('qapp:question_preview'))

视图2

def question_preview(request):
    all_questions = Questions.objects.all()
    question_data = request.session.get('question_data')
    print(question_data)
    question_pk_list = question_data['question_pk']
    preview_questions = all_questions.filter(id__in=question_pk_list)
    ...
    return render(request,'apps/qapp/question_preview.html', {somecontext})

我在这里做错了吗？

更新

before validation <QueryDict: {'topics_all': ['1', '2'], 'csrfmiddlewaretoken': ['...'], 'subtopics_all': ['4', '2'], 'classroom': ['3'], 'difficulty': ['l', 'm']}>
[28/Feb/2018 17:17:39] "POST /question/filter/ HTTP/1.1" 302 0

(in the second view)question data {'topics_all': '2', 'csrfmiddlewaretoken': '...', 'difficulty': 'm', 'subtopics_all': '2', 'classroom': '3'}

Answer 1

默认情况下不保存会话。添加request.session.modified = True：

def question_filter(request):
    if request.method == 'POST':
        print('before validation', request.POST)
        request.session['question_data'] = request.POST
        request.session.modified = True
        return HttpResponseRedirect(reverse('qapp:question_preview'))

https://docs.djangoproject.com/en/2.0/topics/http/sessions/#when-sessions-are-saved

修改

你可以使用json破解它：

import json def question_filter(request): if request.method == 'POST': print('before validation', request.POST) request.session['question_data'] = json.dumps(request.POST) return HttpResponseRedirect(reverse('qapp:question_preview')) def question_preview(request): all_questions = Questions.objects.all() question_data = json.loads(request.session.get('question_data')) print(question_data) question_pk_list = question_data['question_pk'] preview_questions = all_questions.filter(id__in=question_pk_list) ... return render(request,'apps/qapp/question_preview.html', {somecontext})

Answer 2

您无法像import numpy as np import matplotlib.pyplot as plt from scipy.optimize import fmin_cobyla P = (2487,1858) def f(x): return (1.77425666496e-05 * x**3 + -0.125555135823 * x**2 + 296.656015233 * x + -232082.382985) def objective(x): return np.sqrt((x[0] - P[0])**2 + (f(x[0]) - P[1])**2) def c1(x): return 0.0 x_c = fmin_cobyla(objective, x0=2300, cons=c1) X = [x_c , f(x_c)] print ("The minimum distance is {0:1.2f}".format(objective(X))) v1 = np.array(P) - np.array(X) v2 = np.array([1, 2.0 * X[0]]) print ("dot(v1, v2) = ",np.dot(v1, v2)) x = np.linspace(1000, 3000, 500000) plt.plot(x, f(x), 'r-', label='f(x)') plt.plot(P[0], P[1], 'bo', label='point') plt.plot([P[0], X[0]], [P[1], X[1]], 'b-', label='shortest distance') plt.plot([X[0], X[0] + 1], [X[1], X[1] + 2.0 * X[0]], 'g-', label='tangent') plt.axis('equal') plt.xlabel('x') plt.ylabel('y') plt.show()那样发送所有post data，因为您必须以不同的方式访问每个名称，并将其设置在list inside your input names,。

session

与其他request.session['question_data'] = request.POST.getlist('topics_all')相同，然后在第二个视图中使用键进行访问

request.session没有将完整的querydict转移到另一个视图

2 个答案: