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我正在关注this tutorial。我正在尝试检索用户属性; first_name，但我得到了None。无法检索Facebook用户属性
虽然我能够检索一些用户属性，如名称，图片和电子邮件。
main.py
class User(db.Model):
user_id = db.StringProperty(required=True)
access_token = db.StringProperty(required=True)
name = db.StringProperty(required=True)
first_name = db.StringProperty()
picture = db.StringProperty(required=True)
email = db.StringProperty()
friends = db.StringListProperty()
dirty = db.BooleanProperty()
def refresh_data(self):
"""Refresh this user's data using the Facebook Graph API"""
me = Facebook().api(u'/me',
{u'fields': u'picture,friends', u'access_token': self.access_token})
self.dirty = False
self.name = me[u'name']
self.first_name = me[u'first_name']
self.email = me.get(u'email')
self.picture = me[u'picture']
self.friends = [user[u'id'] for user in me[u'friends'][u'data']]
return self.put()
...
def init_facebook(self):
"""Sets up the request specific Facebook and User instance"""
facebook = Facebook()
user = None
# initial facebook request comes in as a POST with a signed_request
if u'signed_request' in self.request.POST:
facebook.load_signed_request(self.request.get('signed_request'))
# we reset the method to GET because a request from facebook with a
# signed_request uses POST for security reasons, despite it
# actually being a GET. in webapp causes loss of request.POST data.
self.request.method = u'GET'
self.set_cookie(
'u', facebook.user_cookie, datetime.timedelta(minutes=1440))
elif 'u' in self.request.cookies:
facebook.load_signed_request(self.request.cookies.get('u'))
# try to load or create a user object
if facebook.user_id:
user = User.get_by_key_name(facebook.user_id)
if user:
# update stored access_token
if facebook.access_token and \
facebook.access_token != user.access_token:
user.access_token = facebook.access_token
user.put()
# refresh data if we failed in doing so after a realtime ping
if user.dirty:
user.refresh_data()
# restore stored access_token if necessary
if not facebook.access_token:
facebook.access_token = user.access_token
if not user and facebook.access_token:
me = facebook.api(u'/me', {u'fields': u'picture,friends'})
user = User(key_name=facebook.user_id,
user_id=facebook.user_id,
access_token=facebook.access_token,
name=me[u'name'],
first_name=facebook.first_name,
email=me.get(u'email'), # optional
picture=me[u'picture'],
friends=[user[u'id'] for user in me[u'friends'][u'data']])
user.put()
self.facebook = facebook
self.user = user
runs.html
<strong>first name:</strong>
{{ logged_in_user.first_name }}