我的网站允许老师为作业创建多个问题。作业完成后，学生可以来为每个问题写下答案。
我的问题是每个条目只保存一个答案。例如，作业中有两个问题。第一题的答案是"asdf"，第二题的答案是"fdsa"。两个答案的内容应该是唯一的，但将被保存为"asdf"。
我试过打印request.form，它看起来像这样(不包括csrf_tokens):('code_content', 'asdf'), ('code_content', 'fdsa'), ('submit', 'Submit Assignment')]
所以我知道fdsa仍然在那里的某个地方，但我无法访问它。如果这很重要，那么在打印request.form.
时，有两个csrf_token是完全相同的为了获得这些数据，我为作业中的许多问题创建了一个'GetQuestionContent()'表单。这样的:
questions = []
question_content_forms = []
for question in Question.query.all():
if int(question.owner) == int(assignment_id):
questions.append(question)
question_content_forms = [GetQuestionContent() for item in range(0, len(questions))]
然后，在HTML中，我这样写表单:
<form method="POST">
{% for question in questions %}
<div class="accordion-item">
<h2 class="accordion-header" id="heading{{ question.id }}">
<button class="accordion-button collapsed"
type="button"
data-bs-toggle="collapse"
data-bs-target="#collapse{{ question.id }}"
aria-expanded="false"
aria-controls="collapse{{ question.id }}">
{{ question.title }}
</button>
</h2>
<div id="collapse{{ question.id }}"
class="accordion-collapse collapse"
aria-labelledby="heading{{ question.id }}"
data-bs-parent="#questionsAccordion">
<p>
<small>
<strong>Question Description</strong>
<br>
{% if question.description != "" %}
{{ question.description|safe }}
{% else %}
<em>The assignment creator did not provide a description for this question.</em>
{% endif %}
</small>
</p>
{{ question_content_forms[loop.index - 1].hidden_tag() }}
{% if question.type == "code" %}
<div class="code-box">
{{ question_content_forms[loop.index - 1].code_content(id = "editor") }}
</div>
{% endif %}
{% if question.type == "text" %}
{{ question_content_forms[loop.index - 1].text_content|safe }}
{% endif %}
</div>
</div>
{% endfor %}
{% if current_user.account_type == "Student" %}
{{ submit_button.submit(class="btn btn-outline-success mt-3", value="Submit Assignment")}}
{% endif %}
</form>
当用户按下submit时，我想获得每个答案，并将其放入数据库中StudentQuestionSubmission表的条目中。这就是代码的样子:
if request.method == "POST" and submit_button.data:
print(request.form)
index = 0
for question in questions:
question_to_submit = StudentQuestionSubmission(question_id = int(question.id),
student_id = int(current_user.id))
if question.type == "code":
question_to_submit.question_content = question_content_forms[index].code_content.data
elif question.type == "text":
question_to_submit.question_content = question_content_forms[index].text_content.data
print(f"nn{ question_content_forms[index].code_content.data } n
{ question_content_forms[index].text_content.data } nn")
index += 1
db.session.add(question_to_submit)
assignment_to_submit = StudentAssignmentSubmission(assignment_id = int(assignment_id),
student_id = int(current_user.id),
has_submitted = True,
submission_date = date.today())
db.session.add(assignment_to_submit)
db.session.commit()
flash(f"'{assignment.name}' has been succesfully submitted.")
return redirect(url_for('classroom_assignments_list', class_id = class_id, paper_id = paper_id))
可以看到我打印了文本框的数据。它将在两次迭代中输出'asdf'，即使我为问题2编写了完全不同的内容。
我很感激你的帮助。谢谢你。编辑:'hackily'从使用request.form.to_dict(flat=False)['your_form_field']的相同形式的多个实例中获取内容
下面是新代码:
if request.method == "POST" and submit_button.data:
code_content = request.form.to_dict(flat=False)['code_content']
text_content = request.form.to_dict(flat=False)['text_content']
code_content_index = 0
text_content_index = 0
for question in questions:
question_to_submit = StudentQuestionSubmission(question_id = int(question.id),
student_id = int(current_user.id))
if question.type == "code":
question_to_submit.question_content = code_content[code_content_index]
code_content_index += 1
elif question.type == "text":
question_to_submit.question_content = text_content[text_content_index]
text_content_index += 1
print(f"nn{ question_to_submit.question_content } nn")
db.session.add(question_to_submit)
assignment_to_submit = StudentAssignmentSubmission(assignment_id = int(assignment_id),
student_id = int(current_user.id),
has_submitted = True,
submission_date = date.today())
db.session.add(assignment_to_submit)
db.session.commit()
flash(f"'{assignment.name}' has been succesfully submitted.")
return redirect(url_for('classroom_assignments_list', class_id = class_id, paper_id = paper_id))
我的建议是不要创建多个表单，而是动态地为所有必要的问题创建一个表单。在这种情况下，可以为每个字段分配一个唯一的id，这表明它属于问题。
下面的示例向您展示了一个可能的实现。
每个问题的答案字段被添加到表单中，该字段的名称中包含问题的id。因此，可以在呈现和查询输入数据时分配相应的问题。
from flask import (
Flask,
render_template,
request
)
from flask_sqlalchemy import SQLAlchemy
from flask_wtf import FlaskForm
from wtforms import TextAreaField, SubmitField
from wtforms.validators import DataRequired
import random
app = Flask(__name__)
app.secret_key = 'your secret here'
db = SQLAlchemy(app)
class Question(db.Model):
id = db.Column(db.Integer, primary_key=True)
type = db.Column(db.String)
owner = db.Column(db.Integer)
title = db.Column(db.String)
description = db.Column(db.Text)
with app.app_context():
db.drop_all()
db.create_all()
qs = [Question(
type=random.choice(['code', 'text']),
owner=1,
title=f'Question {i+1}',
description=f'Your description here.'
) for i in range(3)]
db.session.add_all(qs)
db.session.commit()
def form_factory(qs):
class F(FlaskForm):
submit = SubmitField('Submit')
for q in qs:
field = TextAreaField(
q.type.title(),
validators=[
# DataRequired()
],
)
setattr(F, f'q-{q.id}', field)
return F
@app.route('/', methods=['GET', 'POST'])
def index():
questions = Question.query.filter_by(owner=1).all()
form = form_factory(questions)(request.form)
if form.validate_on_submit():
for q in questions:
field = getattr(form, f'q-{q.id}')
print(f'Question-{q.id}n{field.data}n')
return render_template('index.html', **locals())
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Index</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-0evHe/X+R7YkIZDRvuzKMRqM+OrBnVFBL6DOitfPri4tjfHxaWutUpFmBp4vmVor" crossorigin="anonymous">
</head>
<body>
<div class="container my-3">
<form method="post">
{{ form.hidden_tag() }}
<div class="accordion mb-3" id="accordionExample">
{% for q in questions -%}
<div class="accordion-item">
<h2 class="accordion-header" id="heading-{{loop.index}}">
<button
class="accordion-button collapsed"
type="button"
data-bs-toggle="collapse"
data-bs-target="#collapse-{{loop.index}}"
aria-expanded="false"
aria-controls="collapse-{{loop.index}}"
>
{{ q.title }}
</button>
</h2>
<div
id="collapse-{{loop.index}}"
class="accordion-collapse collapse"
aria-labelledby="heading-{{loop.index}}"
data-bs-parent="#accordionExample"
>
<div class="accordion-body">
<div class="mb-3">
{{ q.description|safe }}
</div>
{% set field = form|attr('q-{}'.format(q.id)) -%}
<div>
{{ field.label(class_='form-label') }}
{{ field(class_='form-control' + ('', ' editor')[q.type=='code']) }}
</div>
</div>
</div>
</div>
{% endfor -%}
</div>
<div class="d-grid gap-2">
{{ form.submit(class_='btn btn-primary') }}
</div>
</form>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-pprn3073KE6tl6bjs2QrFaJGz5/SUsLqktiwsUTF55Jfv3qYSDhgCecCxMW52nD2" crossorigin="anonymous"></script>
</body>
</html>