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<p>当我在视图组件中设置隐藏字段的值并提交表单时,另一端的POST变量返回每个变量的两个实例,其中第一个为空,但第二个保存预期数据。我似乎无法从POST变量(这是一种不可变的multidict类型)检索或弹出数据。如果我将帖子转换为dict,则会丢失包括数据在内的第二个变量。此外,如果我尝试遍历POST变量并构建字典,则不会复制第二个变量。因此,基本上,即使我接受这种口是心非的说法,我也无法获得帖子数据</p>
<p>我在传统的MVC架构中使用Flask和WTForms</p>
<p><strong>forms.py:</strong></p>
<pre><code>class TestForm(FlaskForm):
the_int = HiddenField()
the_string = HiddenField()
the_list = HiddenField()
the_dict = HiddenField()
submit = SubmitField('Submit')
</code></pre>
<p><strong>routes.py:</strong></p>
<pre><code>@app.route('/test')
def test():
an_int = 1
a_string = "ABC"
a_list = ['One', 'Two']
a_dict = {'First': 'A', 'Second': 'B'}
form = TestForm()
return render_template('test.html', an_int = an_int,
a_string = a_string,
a_list = a_list,
a_dict = a_dict,
form = form)
@app.route('/testresult', methods=['GET', 'POST'])
def testresult():
if request.method == "POST":
formdata = request.form
dictdata = dict(request.form)
builtdata = {}
for k, v in request.form.items():
builtdata.update({k: v})
return render_template('testresult.html', formdata = formdata,
dictdata = dictdata,
builtdata = builtdata)
return render_template('test')
</code></pre>
<p><strong>test.html:</strong></p>
<pre><code><h1>Test</h1>
<br>
<form action="testresult" method="POST">
{{ form.hidden_tag() }}
{{ form.the_int(value=an_int) }}
{{ form.the_string(value=a_string) }}
{{ form.the_list(value=a_list) }}
{{ form.the_dict(value=a_dict) }}
{{ form.submit() }}
</form>
</code></pre>
<p><strong>testresult.html:</strong></p>
<pre><code><h1>Result</h1>
<p>{{ formdata }}</p>
<p>{{ dictdata }}</p>
<p>{{ builtdata }}</p>
</code></pre>
<p><strong>在testresult.html中生成结果:</strong></p>
<pre><code>Result
ImmutableMultiDict([('the_int', ''), ('the_int', '1'), ('the_string', ''), ('the_string', 'ABC'), ('the_list', ''), ('the_list', "['One', 'Two']"), ('the_dict', ''), ('the_dict', "{'First': 'A', 'Second': 'B'}"), ('csrf_token', 'IjN---kWw'), ('submit', 'Submit')])
{'the_int': '', 'the_string': '', 'the_list': '', 'the_dict': '', 'csrf_token': 'IjN---kWw', 'submit': 'Submit'}
{'the_int': '', 'the_string': '', 'the_list': '', 'the_dict': '', 'csrf_token': 'IjN---kWw', 'submit': 'Submit'}
</code></pre>