在Flask的Jinja的模版的html中，以及Flask的views.py中的路由中
跳转到对应的页面的时候，传递的参数，无法保持原先的对象
具体现象是：
代码：
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/flask/sipevents/views.py
@app.route(“/”) def index(): requestArgs = request.args app.logger.debug(‘requestArgs=%s’, requestArgs) # curUser = request.args.get(“curUser”, None) curUser = request.args.get(“curUser”, User(openid=””)) app.logger.debug(‘curUser=%s’, curUser) app.logger.debug(‘type(curUser)=%s’, type(curUser)) #if curUser is None : if not curUser.openid: needRedirect = False paraCode = request.args.get(‘code’, ”) app.logger.debug(‘paraCode=%s’, paraCode) if not paraCode: needRedirect = True paraState = request.args.get(‘state’, ”) app.logger.debug(‘paraState=%s’, paraState) # if not paraState : # needRedirect = True app.logger.debug(‘needRedirect=%s’, needRedirect) if needRedirect: # 1. redirect url redirect_uri = “http://hd.webonn.com” authorize_url = wechat.generate_oauth2_authorize_url(redirect_uri) app.logger.debug(‘redirect_uri=%s, authorize_url=%s’, redirect_uri, authorize_url) return redirect(authorize_url) else: # 2. get access token respAccessToken = wechat.get_oauth2_access_token(paraCode) app.logger.debug(‘respAccessToken=%s’, respAccessToken) # respAccessToken={u’access_token’: u’5Lnjm56ox1djVEFEIAdvp4HdcHVO1WsEWCDXVIS0zLZc3veMB4KXLMu843h_MpLJ6xLjlHGeclhhhSsErowWCeFMBMC3CbWX4zDezvu_D7M’, u’openid’: u’oswxxxxxxxxxxxxxxxxxxxxxxVVY’, u’expires_in’: 7200, u’refresh_token’: u’QE-prEWTMHrDBqZGcJLYOg5fNqvpVL6qrp2YekXlyWq2agtwsGhO5IIxujpIBwXzUMy80n7d9xiWFZEwrNt10ilFpRkTbwP4cBzQ2df7eUw’, u’scope’: u’snsapi_userinfo’} respAccessTokenStr = jsonToStr(respAccessToken) app.logger.debug(‘respAccessTokenStr=%s’, respAccessTokenStr) # respAccessTokenStr = { # “access_token”: “K8EMRg7DTYnElLOgLix0yVIKeSg85KWmChnGK4PZ8T5N2EiHevQZEm6hyMBPfkOh5Hl3r0H_koLFmHuMFuGOXoyLMn-A7IT0ztqPKvi6TIY”, # “openid”: “oswxxxxxxxxxxxxxxxxxxxxxxVVY”, # “expires_in”: 7200, # “refresh_token”: “wWfqaQyxbAK4WUKwmPeTuSQ7_Nlnxz35xAZ5fu6ZlQseR526zKyemwA7YozbUmbGYSETIpGCi0T-HXMhgKXKVvi5Kon2_4_uWAwhNcxCRBI”, # “scope”: “snsapi_userinfo” # } oauth2Access_token = respAccessToken[‘access_token’] oauth2Openid = respAccessToken[‘openid’] app.logger.debug(‘oauth2Access_token=%s, oauth2Openid=%s’, oauth2Access_token, oauth2Openid) respUserInfoDict = wechat.get_oauth2_userinfo(oauth2Access_token, oauth2Openid) app.logger.debug(‘type(respUserInfoDict)=%s, respUserInfoDict=%s’, type(respUserInfoDict), respUserInfoDict) # type(respUserInfoDict) = < type ‘dict’ >, respUserInfoDict = {u’province’: u’\xe6\xb1\x9f\xe8\x8b\x8f’, # u’openid’: u’oswxxxxxxxxxxxxxxxxxxxxxxVVY’, # u’headimgurl’: u’http://wx.qlogo.cn/mmopen/ajNVdqHZLLDYtIJicNl7MjwZK5c1lxAJZ253c9v3JzDib7GeE5OFrWiaRqsK1ruW1HmGaziaYETV5vQhIIbic6wHKFQ/0′, # u’language’: u’zh_CN’, u’city’: u’\xe8\x8b\x8f\xe5\xb7\x9e’, # u’country’: u’\xe4\xb8\xad\xe5\x9b\xbd’, u’sex’: 1, u’privilege’: [], # u’nickname’: u’\xe7\xa4\xbc\xe8\xb2\x8c’} province = respUserInfoDict[‘province’] city = respUserInfoDict[‘city’] country = respUserInfoDict[‘country’] nickname = respUserInfoDict[‘nickname’] app.logger.debug(‘province=%s, city=%s, country=%s, nickname=%s’, province, city, country, nickname) app.logger.debug(‘type(province)=%s’, type(province)) openid = respUserInfoDict[‘openid’] currentUsers = User.query.all() app.logger.debug(‘currentUsers=%s’, currentUsers) currentUsersCount = len(currentUsers) app.logger.debug(‘currentUsersCount=%s’, currentUsersCount) existedUser = User.query.filter_by(openid = openid).first() callbackOkStr = “” if existedUser : # has exsited this user #callbackOkStr = u’已存在此用户 existedUser=%r’ % (existedUser) callbackOkStr = u’已存在此用户 openid=%s, nickname=%s’ % (openid, nickname) app.logger.debug(“type(existedUser)=%s”, type(existedUser)) curUser = existedUser app.logger.debug(“type(curUser)=%s”, type(curUser)) else: #download avatar image avatarUrl = respUserInfoDict[‘headimgurl’] app.logger.debug(“avatarUrl=%s”, avatarUrl) avatarReq = requests.get(avatarUrl) app.logger.debug(“avatarReq=%s”, avatarReq) staticFolder = app.static_folder app.logger.debug(“staticFolder=%s”, staticFolder) avatartName = openid + “.png” app.logger.debug(“avatartName=%s”, avatartName) avatarStaticPath = os.path.join(“img/avatar”, avatartName) app.logger.debug(“avatarStaticPath=%s”, avatarStaticPath) avatarFullPath = os.path.join(staticFolder, avatarStaticPath) app.logger.debug(“avatarFullPath=%s”, avatarFullPath) with open(avatarFullPath, ‘wb’) as f: f.write(avatarReq.content) f.close() app.logger.debug(“downloaded avatar=%s ok”, avatarUrl) # new user, need save respUserObj = User( openid = respUserInfoDict[‘openid’], province = respUserInfoDict[‘province’], avatar_url = respUserInfoDict[‘headimgurl’], avatar_static_path = avatarStaticPath, language = respUserInfoDict[‘language’], city = respUserInfoDict[‘city’], country = respUserInfoDict[‘country’], sex = respUserInfoDict[‘sex’], nickname = respUserInfoDict[‘nickname’]) app.logger.debug(‘respUserObj=%s’, respUserObj) db.session.add(respUserObj) db.session.commit() app.logger.debug(‘added respUserObj=%s’, respUserObj) app.logger.debug(“type(respUserObj)=%s”, type(respUserObj)) curUser = respUserObj app.logger.debug(“type(curUser)=%s”, type(curUser)) respUserInfoStr = jsonToStr(respUserInfoDict) app.logger.debug(‘type(respUserInfoStr)=%s, respUserInfoStr=%s’, type(respUserInfoStr), respUserInfoStr) callbackOkStr = u”已成功添加用户: respUserInfoStr=%s” % (respUserInfoStr) app.logger.debug(“callbackOkStr=%s”, callbackOkStr) app.logger.debug(“curUser=%s”, curUser) app.logger.debug(“type(curUser)=%s”, type(curUser)) currentUsers = User.query.all() app.logger.debug(‘currentUsers=%s’, currentUsers) currentUsersCount = len(currentUsers) app.logger.debug(‘currentUsersCount=%s’, currentUsersCount) todayEventList = Event.query.filter_by(user_openid = curUser.openid).all() app.logger.debug(“todayEventList=%s”, todayEventList) # return make_response(callbackOkStr) return render_template(‘index.html’, curUser= curUser, todayEventList = todayEventList) @app.route(‘/creat_event’, methods=[‘GET’, ‘POST’]) def creat_event(): requestMethod = request.method app.logger.debug(‘requestMethod=%s’, requestMethod) requestArgs = request.args app.logger.debug(‘requestArgs=%s’, requestArgs) #curUser = request.args.get(“curUser”, None) curUser = request.args.get(“curUser”, User(openid=””)) app.logger.debug(‘curUser=%s’, curUser) app.logger.debug(‘type(curUser)=%s’, type(curUser)) if request.method == ‘POST’: requestForm = request.form app.logger.debug(“requestForm=%s”, requestForm) title = requestForm.get(“title”, “”) start_date = requestForm.get(“start_date”, “”) end_date = requestForm.get(“end_date”, “”) location = requestForm.get(“location”, “”) max_user_num = requestForm.get(“max_user_num”, “”) is_public = requestForm.get(“is_public”, “”) description = requestForm.get(“description”, “”) notification_time = requestForm.get(“notification_time”, “”) app.logger.debug(“title=%s, start_date=%s, end_date=%s, location=%s, max_user_num=%s, is_public=%s, description=%s, notification_time=%s”, title, start_date, end_date, location, max_user_num, is_public, description, notification_time) # 2016/8/26 10:09 # start_date = datetime.strptime(start_date, “%y/%m/%d %H:%M”) return redirect(url_for(‘index’, curUser = curUser)) else: return render_template(“creatEvent.html”, curUser = curUser) |
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/flask/sipevents/templates/creatEvent.html
<form action=”{{ url_for(“creat_event”, curUser=curUser) }}” method=”POST”> |
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/flask/sipevents/templates/index.html
<a href=”{{ url_for(‘creat_event’, curUser = curUser) }}” class=”link icon-only” class=”external”> |
对应的log是：
DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:317]: curUser=<User nickname=u’\u793c\u8c8c’ openid=oswjmv4X0cCXcfkIwjoDfCkeTVVY avatar_static_path=img/avatar/oswjmv4X0cCXcfkIwjoDfCkeTVVY.png> <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:318]: type(curUser)=<type ‘unicode’> <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:322]: requestForm=ImmutableMultiDict([(‘notification_time’, u’\u4e0d\u63d0\u9192′), (‘description’, u”), (‘end_date’, u’2016/8/26 10:46′), (‘title’, u’\u96c6\u4f53′), (‘location’, u”), (‘start_date’, u’2016/8/26 10:46′), (‘max_user_num’, u”)]) <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:333]: title=集体, start_date=2016/8/26 10:46, end_date=2016/8/26 10:46, location=, max_user_num=, is_public=, description=, notification_time=不提醒 <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:168]: requestArgs=ImmutableMultiDict([(‘curUser’, u”<User nickname=u’\\u793c\\u8c8c’ openid=oswjmv4X0cCXcfkIwjoDfCkeTVVY avatar_static_path=img/avatar/oswjmv4X0cCXcfkIwjoDfCkeTVVY.png>”)]) <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:172]: curUser=<User nickname=u’\u793c\u8c8c’ openid=oswjmv4X0cCXcfkIwjoDfCkeTVVY avatar_static_path=img/avatar/oswjmv4X0cCXcfkIwjoDfCkeTVVY.png> <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:173]: type(curUser)=<type ‘unicode’> <div–<—————————————————————————— [2016-08-26 10:46:43 +0000] [32292] [ERROR] Error handling request /?curUser=%3CUser+nickname%3Du%27%5Cu793c%5Cu8c8c%27+openid%3Doswjmv4X0cCXcfkIwjoDfCkeTVVY+avatar_static_path%3Dimg%2Favatar%2Foswjmv4X0cCXcfkIwjoDfCkeTVVY.png%3E Traceback (most recent call last): File “/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py”, line 135, in handle self.handle_request(listener, req, client, addr) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py”, line 176, in handle_request respiter = self.wsgi(environ, resp.start_response) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 2000, in __call__ return self.wsgi_app(environ, start_response) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1991, in wsgi_app response = self.make_response(self.handle_exception(e)) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1567, in handle_exception reraise(exc_type, exc_value, tb) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1988, in wsgi_app response = self.full_dispatch_request() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1641, in full_dispatch_request rv = self.handle_user_exception(e) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1544, in handle_user_exception reraise(exc_type, exc_value, tb) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1639, in full_dispatch_request rv = self.dispatch_request() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1625, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) File “/usr/share/nginx/html/SIPEvents/sipevents/views.py”, line 176, in index if not curUser.openid: AttributeError: ‘unicode’ object has no attribute ‘openid’ |
在之前，views.py中的，是User这个对象
但是传递到html中，再GET或POST会到views.py中的路由中，就变成了对应的unicode类型了。
类似的，之前用：
curUser = request.args.get(“curUser”, “”) |
以为是默认值，导致变量是unicode
去改为None：
curUser = request.args.get(“curUser”, None) |
结果还是
最后改为现在的：
curUser = request.args.get(“curUser”, User(openid=””)) |
结果还是unicode类型。。。
－》
然后自己看了半天，有点明白了：
此处的，通过Html跳转到路由中的，不论是GET还是POST，都只能是：
传递过来对应的字符串
－》所以此处，接收到的是对象格式化后的字符串：
DEBUG in views [/usr/share/nginx/html/SIPEvents/sipevents/views.py:317]: curUser=<User nickname=u’\u793c\u8c8c’ openid=oswjmv4X0cCXcfkIwjoDfCkeTVVY avatar_static_path=img/avatar/oswjmv4X0cCXcfkIwjoDfCkeTVVY.png> |
并非对象本身。
Jinjia url_for pass object
python – How can I “redirect” to another URL and pass a list object using Flask – Stack Overflow
python – Getting a request parameter in Jinja2 – Stack Overflow
Python, Flask – Passing Arguments Into redirect(url_for()) – Stack Overflow
Jinja call flask router pass object
python – How can I pass data from Flask to JavaScript in a template? – Stack Overflow
［总结］
换言之：
Html到路由，不论GET还是POST，都只能传递字符串级别的内容，而无法传递整个对象
－》除非对象进行编码和解码。。。
->不过，反过来：
在views.py中的路由中，用
render_template的时候，是可以传递整个对象到Html中的
然后jinjia中用对应for someList去生成对应的html代码。
－》稍微高级点的办法可以是：
把对象转换为json，从html中的url_for时，传递到flask中的路由中
路由中通过request.get的得到json后，可以解析出对应的字典变量－》可以获得更多的信息，但是无法传递完整的object对象变量