问题
I have a /consults page displaying a list of consults. My list loop looks like this:
{% for consult in consults %}
<tr>
<td><a href="/consults/view-consult?key={{consult.key.urlsafe()}}">{{ consult.consult_date }}</a></td>
<td>{{ consult.consult_time }}</td>
<td>{{ consult.patient_first }}</td>
<td>{{ consult.patient_last }}</td>
<td><span class="badge badge-warning">{{ consult.consult_status }}</span></td>
</tr>
{%endfor%}
So I'm using the url to send a Consult key to the individual page to display info about that consult. This forms a url like this:
http://localhost:8080/consults/view-consult?key=aghkZXZ-Tm9uZXIVCxIIQ29uc3VsdHMYgICAgIDIkwoM
When I click the link I get an error:
TypeError: get() takes exactly 1 argument (2 given)
App Info
My webapp2 object has the route:
('/consults/view-consult(.*)', ViewConsultPage)
My RequestHandler for this route:
class ViewConsultPage(webapp2.RequestHandler):
def get(self):
template = JINJA_ENVIRONMENT.get_template('/templates/view-consult.html')
self.response.out.write(template.render())
app.yaml handler:
- url: /consults/view-consult(.*)
script: main.app
Edit:
The Consults object model is defined as follows:
class Consults(ndb.Model):
# Basic Consult Info (To get started storing a consult in the datastore)
# Timestamp consult submitted to datastore
consult_created = ndb.DateTimeProperty(auto_now_add=True)
# Consult booking date
consult_date = ndb.StringProperty()
# Consult booking time
consult_time = ndb.StringProperty()
# Provider booking the consult
consult_user = ndb.StringProperty()
# Consult status: (Pending, Completed, Cancelled)
consult_status = ndb.StringProperty(choices=('Pending','Completed','Cancelled'),default='Pending')
# Patient Info
# The patient's first name
patient_first = ndb.StringProperty()
# The patient's last name
patient_last = ndb.StringProperty()
# The patient's email address
patient_phone = ndb.StringProperty()
# The patient's phone number
patient_email = ndb.StringProperty()
# The patient's age in years
patient_age = ndb.IntegerProperty()
# Does the patient agree to emails from JW?
patient_optin = ndb.BooleanProperty()
# Clinical Info
# Does the patient use an orthodic?
clin_ortho = ndb.BooleanProperty()
# Foot type:(Over Pronated, Moderatly Pronated, Neturtal, Supinated, Orthosis)
clin_type = ndb.StringProperty(choices=('Over Pronated','Moderately Pronated','Neutral','Supinated','Orthosis'))
And the RequestHandler for the /consults page:
class ConsultsPage(webapp2.RequestHandler):
def get(self):
consults = Consults.query().fetch(5)
consults_dic = {"consults" : consults}
template = JINJA_ENVIRONMENT.get_template('/templates/consults.html')
self.response.out.write(template.render(**consults_dic))
def post(self):
booking_date = self.request.get("booking_date")
booking_time = self.request.get("booking_time")
first_name = self.request.get("first_name")
last_name = self.request.get("last_name")
phone_number = self.request.get("phone_number")
email_address = self.request.get("email_address")
age = int(self.request.get("age"))
opt_in = self.request.get("opt_in") == 'on'
has_ortho = self.request.get("has_ortho") == 'on'
foot_type = self.request.get("foot_type")
consult = Consults( consult_date=booking_date,
consult_time=booking_time,
patient_first=first_name,
patient_last=last_name,
patient_phone=phone_number,
patient_email=email_address,
patient_age=age,
patient_optin=opt_in,
clin_ortho=has_ortho,
clin_type=foot_type)
consult.put()
Traceback
Traceback (most recent call last):
File "C:\dev\google-cloud-sdk\platform\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1535, in __call__
rv = self.handle_exception(request, response, e)
File "C:\dev\google-cloud-sdk\platform\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1529, in __call__
rv = self.router.dispatch(request, response)
File "C:\dev\google-cloud-sdk\platform\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1278, in default_dispatcher
return route.handler_adapter(request, response)
File "C:\dev\google-cloud-sdk\platform\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1102, in __call__
return handler.dispatch()
File "C:\dev\google-cloud-sdk\platform\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 572, in dispatch
return self.handle_exception(e, self.app.debug)
File "C:\dev\google-cloud-sdk\platform\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 570, in dispatch
return method(*args, **kwargs)
File "C:\dev\projects\jw-connect\main.py", line 89, in get
self.response.out.write(template.render())
File "C:\dev\google-cloud-sdk\platform\google_appengine\lib\jinja2-2.6\jinja2\environment.py", line 894, in render
return self.environment.handle_exception(exc_info, True)
File "C:\dev\projects\jw-connect\templates\view-consult.html", line 1, in top-level template code
{% extends "/templates/base.html" %}
UndefinedError: 'consult' is undefined
回答1:
Just remove the capturing group (and also the .* present inside that group) from your regex pattern.
('/consults/view-consult', ViewConsultPage)
Use capturing group only if you want to pass some part of your url to the handler.
For example,
('/consults/([^/]*)', ViewConsultPage)
If you make a GET request to this /consults/foo url, it should invoke the ViewConsultPage handler and the captured string foo should be passed to the handler's get function.
def get(self, part):
print part # foo
For this case, you can easily get the parameters and values passed to that url by self.request.get func where self.request holds all the input params along with their values.
class ViewConsultPage(webapp2.RequestHandler):
def get(self):
key = self.request.get('key', None)
print key
来源：https://stackoverflow.com/questions/42506944/webapp2-typeerror-get-takes-exactly-1-argument-2-given