sqlalchemy.exc.DataError：（psycopg2.DataError）值太長，不能輸入字符（20）

Question

試圖在heroku上註冊用戶，但我在heroku日誌中得到這個錯誤，並且出現內部錯誤，並且我參考this

該網站的其餘部分工作，我只是不能註冊時im heroku，在本地主機上工作。

這是燒瓶，有什麼建議嗎？

>>> from app import db,models 
>>> u = models.User(username='susan', password='janemba133') 
>>> db.session.add(u) 
>>> db.session.commit() 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/scoping.py", line 157, in do 
    return getattr(self.registry(), name)(*args, **kwargs) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 801, in commit 
    self.transaction.commit() 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 392, in commit 
    self._prepare_impl() 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 372, in _prepare_impl 
    self.session.flush() 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2019, in flush 
    self._flush(objects) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2137, in _flush 
    transaction.rollback(_capture_exception=True) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__ 
    compat.reraise(exc_type, exc_value, exc_tb) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2101, in _flush 
    flush_context.execute() 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py", line 373, in execute 
    rec.execute(self) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py", line 532, in execute 
    uow 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py", line 174, in save_obj 
    mapper, table, insert) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py", line 800, in _emit_insert_statements 
    execute(statement, params) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 914, in execute 
    return meth(self, multiparams, params) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/sql/elements.py", line 323, in _execute_on_connection 
    return connection._execute_clauseelement(self, multiparams, params) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1010, in _execute_clauseelement 
    compiled_sql, distilled_params 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1146, in _execute_context 
    context) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1341, in _handle_dbapi_exception 
    exc_info 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause 
    reraise(type(exception), exception, tb=exc_tb, cause=cause) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1139, in _execute_context 
    context) 
    File "/app/.heroku/python/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 450, in do_execute 
    cursor.execute(statement, parameters) 
sqlalchemy.exc.DataError: (psycopg2.DataError) value too long for type character varying(20) 
[SQL: 'INSERT INTO "user" (username, password) VALUES (%(username)s, %(password)s) RETURNING "user".id'] [parameters: {'username': 'susan', 'password': '$2b$09$Vez1laSR6yrYxARBQGzF.Oxl/rJVtxN2.uuaXzJK6zberdikWy98K'}] 

Models.py

from app import app, db, bcrypt, slugify, JWT, jwt_required, current_identity, safe_str_cmp 
from sqlalchemy import Column, Integer, DateTime, func 
from app import (TimedJSONWebSignatureSerializer 
          as Serializer, BadSignature, SignatureExpired) 

import datetime 


class User(db.Model): 

    id = db.Column(db.Integer, primary_key=True) 
    username = db.Column(db.String(80), unique=True) 
    password = db.Column(db.String(20), unique=True) 
    # posts = db.relationship('Post', backref='author', lazy='dynamic') 

    def __init__(self, username, password): 
     self.username = username 
     self.password = bcrypt.generate_password_hash(password, 9) 


    def is_authenticated(self): 
     return True 


    def is_active(self): 
     return True 

    def is_anonymous(self): 
     return False 

    def get_id(self): 
     return (self.id) 

    def __repr__(self): 
     return '<User %r>' % self.username 



class Post(db.Model): 
    __tablename__ = "posts" 

    id = db.Column(db.Integer, primary_key=True) 
    title = db.Column(db.String(80)) 
    body = db.Column(db.Text) 
    user_id = db.Column(db.Integer, db.ForeignKey('user.id')) 
    slug = db.Column(db.String(80), index=True, nullable=True) 
    author = db.relationship("User",backref=db.backref("posts",lazy="dynamic")) 

    time_created = Column(DateTime(timezone=True), server_default=func.now()) 
    time_updated = Column(DateTime(timezone=True), onupdate=func.now()) 

    def __init__(self, title, body, slug,author): 
     self.title = title 
     self.body = body 
     self.slug = slugify(title).lower() 
     self.author = author 

requirements.txt

Flask==0.10.1 
Flask-SQLAlchemy==2.1 
gunicorn==19.4.5 
itsdangerous==0.24 
Jinja2==2.8 
MarkupSafe==0.23 
psycopg2==2.7.1 
SQLAlchemy==1.0.12 
Werkzeug==0.11.9 
simplejson==3.10.0 
six==1.10.0 
slugify==0.0.1 
Flask-Bcrypt==0.7.1 
Flask-HTTPAuth==3.2.2 
Flask-Jsonpify==1.5.0 
Flask-JWT==0.3.2 
Flask-Login==0.4.0 
Flask-Migrate==2.0.3 
Flask-Script==2.0.5 
Flask-WhooshAlchemy==0.56 
Flask-Session==0.3.1 
PyJWT==1.4.2 
bcrypt==3.1.3 

Answer 1

我固定它，我所要做的就是增加我的密碼，最大到120，而不是20 ，因爲它使用了bcrypt，所以它可以佔用大量的字符。

破壞數據庫， 並做

db.create_all() 

，你應該是好去。