AttributeError，'dict'對象沒有屬性'iteritems'; Flask-SQLAlchemy在提交到數據庫時出錯

Question

我一直試圖讓它運行一段時間，但似乎無濟於事。我有一個web應用程序請求用戶輸入數據，然後提交給數據庫。當我通過瀏覽器添加數據時，數據被傳遞給數據庫，但Werkzeug吐出了一些錯誤，我在下面的跟蹤中詳細介紹了這些錯誤。

我views.py：

from flask import request, flash, render_template, url_for, redirect 
from aalert import app, db 
import flask_whooshalchemy 
from flask_login import LoginManager, login_required, logout_user 
from aalert.forms import * 

from aalert.models import User, PubInfo, PrivInfo 

login_manager = LoginManager() 
login_manager.init_app(app) 
login_manager.login_view = 'login' 

@login_manager.user_loader 
def load_user(userid): 
    return User.query.filter(User.id==userid).first() 

@app.route('/signup', methods=['GET', 'POST']) 
def signup(): 
    form = SignupForm() 
    if form.validate_on_submit(): 
     user = User(username=form.username.data, password = form.password.data) 
     db.session.add(user) 
     db.session.commit() 
     return redirect(url_for('index')) 
    return render_template('signup.html', form=form) 

#pubinfo index 
@app.route('/') 
def index(): 
    entries = PubInfo.query.all() 
    return render_template('disp_tables.html', 
          entries=entries) 


@app.route('/login', methods=['GET', 'POST']) 
def login(): 
    form = LoginForm() 
    if form.validate_on_submit(): 
     user = User.query.filter_by(username=form.username.data).first_or_404() 
     if user.is_correct_password(form.password.data): 
      login_user(user) 
      return redirect(url_for('add')) 
     else: 
      flash('Incorrect username and password!') 
    return render_template('login.html', form=form) 


@app.route('/show_all') 
@login_required 
def show_all_data(): 
    entries = PubInfo.query.join(PrivInfo, PubInfo.id==PrivInfo.id) 
    return render_template('disp_all.html', 
          entries) 


@app.route('/add', methods=['POST', 'GET']) 
#@login_required #login required to add functions, points to @login_manager.user_loader 
def insert(): 
    form = AddEntry() 
    if request.method == 'POST': 
     if not request.form['firstname'] or not request.form['lastname'] or not request.form['age'] or not request.form['height'] or not request.form['last_loc'] or not request.form['missing_since'] or not request.form['contact_info'] or not request.form['home_address']: 
      flash('Please ensure all fields are filled out!') 
     else: 
      pubentry = PubInfo(request.form['firstname'], 
           request.form['lastname'], 
           request.form['age'], 
           request.form['height'], 
           request.form['last_loc'], 
           request.form['missing_since']) 

      priventry = PrivInfo(request.form['contact_info'], 
           request.form['home_address']) 
      db.session.add(pubentry) 
      db.session.add(priventry) 
      db.session.commit() 
      flash('Record successfully added.') 
      return redirect(url_for('index')) 
    return render_template('add.html', form=form) 


@app.route('/search', methods=['POST', 'GET']) 
def search(): 
    form = SearchForm() 
    if request.method == 'POST': 
     result = pubinfo.query.whoosh_search(request.form['search_query']) 
     return render_template('results.html', result=result) 
    return render_template('search.html', form=form) 




@app.route('/logout') 
def logout(): 
    logout_user() 

    return redirect(url_for('index')) 


@app.route('/test') 
def test(): 
    return redirect(url_for('login')) 

從錯誤跟蹤：

Traceback (most recent call last): 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 2000, in __call__ 
    return self.wsgi_app(environ, start_response) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 1991, in wsgi_app 
    response = self.make_response(self.handle_exception(e)) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 1567, in handle_exception 
    reraise(exc_type, exc_value, tb) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise 
    raise value 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 1988, in wsgi_app 
    response = self.full_dispatch_request() 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 1641, in full_dispatch_request 
    rv = self.handle_user_exception(e) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 1544, in handle_user_exception 
    reraise(exc_type, exc_value, tb) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise 
    raise value 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 1639, in full_dispatch_request 
    rv = self.dispatch_request() 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask/app.py", line 1625, in dispatch_request 
    return self.view_functions[rule.endpoint](**req.view_args) 
    File "/home/scire/programs/python/aalert/aalert/views.py", line 75, in insert 
    db.session.commit() 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/sqlalchemy/orm/scoping.py", line 157, in do 
    return getattr(self.registry(), name)(*args, **kwargs) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 801, in commit 
    self.transaction.commit() 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 399, in commit 
    self.session.dispatch.after_commit(self.session) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/sqlalchemy/event/attr.py", line 256, in __call__ 
    fn(*args, **kw) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask_sqlalchemy/__init__.py", line 231, in after_commit 
    models_committed.send(session.app, changes=list(d.values())) 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/blinker/base.py", line 267, in send 
    for receiver in self.receivers_for(sender)] 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/blinker/base.py", line 267, in <listcomp> 
    for receiver in self.receivers_for(sender)] 
    File "/home/scire/programs/python/aalert/env/lib/python3.5/site-packages/flask_whooshalchemy.py", line 239, in _after_flush 
    for model, values in bytype.iteritems(): 
AttributeError: 'dict' object has no attribute 'iteritems' 

Answer 1

在Python3 dict.items()確實是dict.iteritems()在Python2做同樣的事情。只需將iteritems()替換爲items()！

Answer 2

我最近在嘗試在python3中使用flask-sqlalchemy時遇到了同樣的錯誤，並且幾乎卡住了。然後我記得https://blog.miguelgrinberg.com/post/about-me做了這樣的事情之前，決定嘗試一下

$ PIP卸載燒瓶whooshalchemy $ PIP安裝混帳混帳+：//github.com/miguelgrinberg/flask-whooshalchemy.git

這爲我工作

https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-x-full-text-search

享受。 ..