запрос py2neo и flask

Question

У меня проблема в моем приложении, я пытаюсь запустить код в фляге с py2neo. У меня есть последняя версия Neo4j и python2.7

Вот мой код fucntion в классе USER

class User: 
    def __init__(self, username): 
      self.username = username 
    def find(self): 
      user = graph.find_one("User", "username", self.username) 
    def add_challenge(self,challenge_title,total_question_per_user,challengecat,percentage_question,prize,ranks,challenge_status): 
      query = ''' 
      MATCH (u:User),(p:Prize),(ca:Category) 
      WHERE u.username = {username} and p.pid = {prize} and ca.catname = {challengecat} 
      CREATE (ch:Challenge {chid: str(uuid.uuid4()),challenge_title: {challenge_title}, total_question_per_user: {total_question_per_user},challenge_status: {challenge_status},timestamp:timestamp(),date:date()}), 
      (p)-[:BELONG {rank: {ranks} }]->(ch),(ca)-[:BELONG {percentage_question: {percentage_question} }]->(ch) 
      ''' 

      return graph.run(query,username=self.username,prize=prize,challengecat=challengecat,challenge_title=challenge_title,total_question_per_user=total_question_per_user,challenge_status=challenge_status,ranks=ranks,percentage_question=percentage_question) 

Я звоню из моего файла вида и я импортировал класс пользователей в файле представление, но когда я запускаю это страница, то это показывает ошибку

это файл представления кода е

@app.route('/admin/add/challenge', methods = ['GET', 'POST']) 
def admin_add_challenge(): 
    if not session.get('username'): 
      return redirect(url_for('admin_login')) 
    if request.method == 'POST': 
      challenge_title = request.form['challenge_title'] 
      total_question_per_user = request.form['total_question_per_user'] 
      challengecat = request.form['challengecat'] 
      percentage_question = request.form['percentage_question'] 
      prize = request.form['prize'] 
      ranks = request.form['ranks'] 
      challenge_status = request.form['challenge_status'] 

      if not challenge_title or not total_question_per_user or not ranks: 
        if not challenge_title: 
          flash('Please Enter Challenge') 
        if not total_question_per_user: 
          flash('Please Enter Number of question Per Player') 
        if not ranks: 
          flash('Please Enter Ranks for win this Challenge') 
      else: 
User(session['username']).add_challenge(challenge_title,total_question_per_user,challengecat,percentage_question,prize,ranks,challenge_status) 
        flash('Challenge Added successfully') 
        return redirect(url_for('admin_add_challenge')) 

    categories = get_categories() 
    prizes = get_prizes() 
    return render_template('admin/admin_add_challenge.html',categories=categories,prizes=prizes) 

Вот ошибка, когда я представить форму вызова на странице http://sitename/admin/add/challenge

ERROR in app: Exception on /admin/add/challenge [POST] 
Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1988, in wsgi_app 
    response = self.full_dispatch_request() 
    File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1641, in full_dispatch_request 
    rv = self.handle_user_exception(e) 
    File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1544, in handle_user_exception 
    reraise(exc_type, exc_value, tb) 
    File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1639, in full_dispatch_request 
    rv = self.dispatch_request() 
    File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1625, in dispatch_request 
    return self.view_functions[rule.endpoint](**req.view_args) 
    File "/root/gamepro/ddqcore/views.py", line 430, in admin_add_challenge 
    User(session['username']).add_challenge(challenge_title,total_question_per_user,challengecat,percentage_question,prize,ranks,challenge_status) 
    File "/root/gamepro/ddqcore/models.py", line 285, in add_challenge 
    return graph.run(query,username=self.username,prize=prize,challengecat=challengecat,challenge_title=challenge_title,total_question_per_user=total_question_per_user,challenge_status=challenge_status,ranks=ranks,percentage_question=percentage_question) 
    File "/usr/local/lib/python2.7/site-packages/py2neo/database/__init__.py", line 731, in run 
    return self.begin(autocommit=True).run(statement, parameters, **kwparameters) 
    File "/usr/local/lib/python2.7/site-packages/py2neo/database/__init__.py", line 1277, in run 
    self.finish() 
    File "/usr/local/lib/python2.7/site-packages/py2neo/database/__init__.py", line 1296, in finish 
    self._sync() 
    File "/usr/local/lib/python2.7/site-packages/py2neo/database/__init__.py", line 1286, in _sync 
    connection.fetch() 
    File "/usr/local/lib/python2.7/site-packages/py2neo/packages/neo4j/v1/bolt.py", line 337, in fetch 
    self.acknowledge_failure() 
    File "/usr/local/lib/python2.7/site-packages/py2neo/packages/neo4j/v1/bolt.py", line 284, in acknowledge_failure 
    fetch() 
    File "/usr/local/lib/python2.7/site-packages/py2neo/packages/neo4j/v1/bolt.py", line 337, in fetch 
    self.acknowledge_failure() 
    File "/usr/local/lib/python2.7/site-packages/py2neo/packages/neo4j/v1/bolt.py", line 284, in acknowledge_failure 
    fetch() 
    File "/usr/local/lib/python2.7/site-packages/py2neo/packages/neo4j/v1/bolt.py", line 322, in fetch 
    raw.writelines(self.channel.chunk_reader()) 
    File "/usr/local/lib/python2.7/site-packages/py2neo/packages/neo4j/v1/bolt.py", line 173, in chunk_reader 
    chunk_header = self._recv(2) 
    File "/usr/local/lib/python2.7/site-packages/py2neo/packages/neo4j/v1/bolt.py", line 156, in _recv 
    raise ProtocolError("Server closed connection") 
ProtocolError: Server closed connection 
49.32.44.55 - - [20/Aug/2016 06:49:05] "POST /admin/add/challenge HTTP/1.1" 500 - 

Answer 1

В Python 2.7 и py2neo версии 3, мы не можем использовать запрос, как это, мы должны запросить как этот

selector = NodeSelector(graph) 
      selected_user = selector.select("User", username=user) 
      selected_prize = selector.select("Prize", pid=prize) 
      selected_cat = selector.select("Category",catname = challengecat) 
      challenge = Node("Challenge",chid=str(uuid.uuid4()),challenge_title=challenge_title,total_question_per_user=total_question_per_user,challenge_status=challenge_status,timestamp=timestamp(),date=date()) 
      rel = Relationship(selected_user,"ADDED",challenge) 
      rel1 = Relationship(selected_prize,"BELONG",challenge) 
      rel2 = Relationship(selected_cat,"BELONG",challenge) 
      graph.create(rel) 
      graph.create(rel1) 
      graph.create(rel2) 

Благодарности CSR