[英]Heroku postgresql operator does not exist
I deployed my site to Heroku running postgresql. 我将我的网站部署到运行Postgresql的Heroku。 Before, I had it on the flask development environment running sqlite.
以前,我在运行sqlite的flask开发环境中使用过它。 The app ran fine when using the schedule view, but when I access the schedule view from Heroku, I get an error.
使用计划视图时,该应用程序运行良好,但是当我从Heroku访问计划视图时,出现错误。
CLASS 类
class Task(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(80), index=True)
description = db.Column(db.String(200), index=True)
priority = db.Column(db.Integer)
is_complete = db.Column(db.Boolean) ####might be trouble
url = db.Column(db.String(200), index=True)
est_dur = db.Column(db.Integer)
time_quad = db.Column(db.Integer)
timestamp = db.Column(db.DateTime, index=True, default=datetime.utcnow)
user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
ROUTE 路线
@bp.route('/schedule')
#@login_required
def schedule():
currentUser = current_user.id
q1 = Task.query.filter_by(time_quad=1).filter_by(user_id=currentUser).filter_by(is_complete=0).all()
q2 = Task.query.filter_by(time_quad=2).filter_by(user_id=currentUser).filter_by(is_complete=0).all()
q3 = Task.query.filter_by(time_quad=3).filter_by(user_id=currentUser).filter_by(is_complete=0).all()
q4 = Task.query.filter_by(time_quad=4).filter_by(user_id=currentUser).filter_by(is_complete=0).all()
taskAll = q1 + q2 + q3 + q4
print("current user" + str(currentUser))
return render_template('schedule.html', taskList = taskAll)
ERROR 错误
Exception on /schedule [GET]
Traceback (most recent call last):
File "/app/.heroku/python/lib/python3.6/site-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
context)
File "/app/.heroku/python/lib/python3.6/site-packages/sqlalchemy/engine/default.py", line 509, in do_execute
cursor.execute(statement, parameters)
psycopg2.ProgrammingError: operator does not exist: boolean = integer
LINE 3: ....time_quad = 1 AND task.user_id = 1 AND task.is_complete = 0
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
[SQL: 'SELECT task.id AS task_id, task.name AS task_name, task.description AS task_description, task.priority AS task_priority, task.is_complete AS task_is_complete, task.url AS task_url, task.est_dur AS task_est_dur, task.time_quad AS task_time_quad, task.timestamp AS task_timestamp, task.user_id AS task_user_id \nFROM task \nWHERE task.time_quad = %(time_quad_1)s AND task.user_id = %(user_id_1)s AND task.is_complete = %(is_complete_1)s'] [parameters: {'time_quad_1': 1, 'user_id_1': 1, 'is_complete_1': 0}] (Background on this error at: http://sqlalche.me/e/f405)
PostgreSQL has a real boolean type but SQLite doesn't, SQLite generally uses one and zero for true and false (respectively). PostgreSQL有一个真正的布尔类型,但是SQLite没有,SQLite通常分别使用true和false分别为1和0。 When you say this:
当你这样说:
filter_by(is_complete=0)
the 0
will be interpreted by SQLite as "false" but by PostgreSQL as just the number zero; SQLite将
0
解释为“ false”,而PostgreSQL仅将其解释为数字0; hence the complaint at Heroku about not being able to compare a boolean and an integer in task.is_complete = 0
. 因此Heroku抱怨无法在
task.is_complete = 0
比较布尔值和整数。 If you mean "false", say so: 如果您的意思是“假”,请这样说:
filter_by(is_complete=False)
That should be converted to zero when talking to SQLite and the proper boolean 'f'
(or false
) when talking to PostgreSQL. 在与SQLite对话时,应将其转换为零;在与PostgreSQL对话时,应将其转换为正确的布尔值
'f'
(或false
)。
Once you fix that, I strongly recommend that you install PostgreSQL in your development environment if that's the database you're going to be deploying on. 解决此问题后,强烈建议您在要在其上部署数据库的开发环境中安装PostgreSQL。 You'll have a much better time of things if you develop, test, and deploy on the same stack.
如果您在同一堆栈上进行开发,测试和部署,那么您的工作时间将大大缩短。
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