我试图从SELECT标记中获取值。在
我的HTML是
<div class="form-group">
<label for="acadYear">Academic Year:</label>
<select id="acadYear" name"acadYear">
<option value="2017-18">This Academic Year</option>
<option value="2018-19">Next Academic Year</option>
</select>
</div>
我的python代码是
^{pr2}$这不会返回任何内容。当我尝试的时候
acadYear=self.request.get_all('acadYear')
抛出一个错误
BadValueError: Expected string, got []
怎么回事?有什么线索吗?在
更多详情
实体
from google.appengine.ext import ndb
class Allocation(ndb.Model):
acadYear = ndb.StringProperty()
branch = ndb.StringProperty()
semester = ndb.StringProperty()
subjectCode = ndb.StringProperty()
subjectName = ndb.StringProperty()
facultyId = ndb.StringProperty()
facultyName = ndb.StringProperty()
choiceNumber = ndb.StringProperty()
status = ndb.StringProperty()
createdOn = ndb.DateTimeProperty(auto_now_add=True)
@classmethod
def faculty_query(cls, parent_key):
return cls.query(ancestor=parent_key).order(-cls.createdOn)
接收数据的HTML代码
<form action="" method="post">
<legend>Mention Your New Preferences Here</legend>
<div class="form-group">
<label for="acadYear">Academic Year:</label>
<select id="acadYear" name="acadYear">
<option value="2017-18">This Academic Year</option>
<option value="2018-19">Next Academic Year</option>
</select>
</div>
<div class="form-group">
<label for="branch">Branch:</label>
<input type="text" id="branch" name"branch" value="CSE or ISE or MCA">
</div>
<div class="form-group">
<label for="semester">Semester:</label>
<input type="text" id="semester" name="semester" value="From 1 to 8"/>
</div>
<div class="form-group">
<label for="choiceNumber">Choice#:</label>
<input type="text" id="choiceNumber" name="choiceNumber" value="1,2,3"/>
</div>
<div class="form-group">
<label for="subjectCode">Subject Code:</label>
<input type="text" id="subjectCode" name="subjectCode" value="Example: 10CS43"/>
</div>
<div class="form-group">
<label for="subjectName">Subject Name:</label>
<input type="text" id="subjectName" name="subjectName" value="Example: Design and Analysis of Algorithms"/>
</div>
<div class="form-group">
<button type="submit">Save Preference</button>
</div>
</form>
Python处理程序
class MainHandler(webapp2.RequestHandler):
def _render_template(self, template_name, context=None):
if context is None:
context = {}
# Get the logged in user
user = users.get_current_user()
ancestor_key = ndb.Key("User", user.nickname())
qry = Allocation.faculty_query(ancestor_key)
context['allocs'] = qry.fetch()
template = jinja_env.get_template(template_name)
return template.render(context)
@ndb.transactional
def _create_alloc(self, user):
alloc = Allocation(parent=ndb.Key("User", user.nickname()),
acadYear=self.request.get_all('acadYear'),
branch=self.request.get('branch'),
semester=self.request.get('semester'),
subjectCode=self.request.get('subjectCode'),
subjectName=self.request.get('subjectName'),
facultyId=user.user_id(),
facultyName=user.nickname(),
choiceNumber=self.request.get('choiceNumber'),
status='Requested')
alloc.put()
def get(self):
user = users.get_current_user()
if user is not None:
logout_url = users.create_logout_url(self.request.uri)
template_context = {
'user': user.nickname(),
'logout_url': logout_url,
}
self.response.out.write(
self._render_template('main.html', template_context))
else:
login_url = users.create_login_url(self.request.uri)
self.redirect(login_url)
def post(self):
user = users.get_current_user()
if user is None:
self.error(401)
self._create_alloc(user)
logout_url = users.create_logout_url(self.request.uri)
template_context = {
'user': user.nickname(),
'logout_url': logout_url,
}
self.response.out.write(
self._render_template('main.html', template_context))
acadYear=self.request.get_all('acadYear')
返回一个list
,显然是在Unicode
中,它需要成为string
的数据存储。在
我试过以下方法
(1)使用中间变量=不起作用。
(2) 编码到UTF-8
-不能,因为list
没有encode
方法。
(3) 我不知道选择[0]
还是{acadYear=self.request.get_all('acadYear')[0].encode('UTF-8')
。在
这么简单的事情-但是-为什么要这么复杂!在
感谢任何帮助。我在孩子面前丢脸。在
您在这一行有一个错误:
你需要在“name”后面加一个“=”。由于这个错误,您的浏览器没有发送select字段的数据。在
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