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Python Using Databases in Python Meet Peewee Queries Are Your Friend

Marcin Mączewski
Marcin Mączewski
4,476 Points
Posted by Marcin Mączewski
Marcin Mączewski
4,476 Points

peewee.OperationalError: table student has no column named points

I keep getting "peewee.OperationalError: table student has no column named points" error, any ideas why? I looked through and through and couldn't figure it out.

from peewee import * 

db = SqliteDatabase('students.db')

class Student(Model):
    username = CharField(max_length=255, unique=True)
    points = IntegerField(default=0)

    class Meta:
        database = db


students = [
    {'username': 'kennethlove',
     'points': 4888},
    {'username': 'chalkers',
     'points': 11912},
     {'username': 'joykesten2',
     'points': 7363},
    {'username': 'craigsdennis',
     'points': 4079},
    {'username': 'davefarland',
     'points': 14717},
]


def add_students():
    for student in students:
        try:
            Student.create(username=student['username'],
                           points=student['points'])
        except IntegrityError:
            student_record = Student.get(username=student['username'])
            student_record.points = student['points']
            student_record.save()



def top_student():
    student = Student.select().order_by(Student.points.desc()).get()
    return student

if __name__ == '__main__':
    db.connect()
    db.create_tables([Student], safe=True)
    add_students()
    print("Our top student right now is: {0.username}.".format(top_student()))

2 Answers

Kris Budhram
Kris Budhram
6,080 Points
Kris Budhram
Kris Budhram
6,080 Points

I copied your code and could not reproduce the error.

The error you get indicate a problem with the students.db file. Have you tried removing it and trying again?

Elizabeth Keleshian
Elizabeth Keleshian
1,844 Points
Elizabeth Keleshian
Elizabeth Keleshian
1,844 Points

I also have this issue. Don't know what's wrong. Here's my code.

from peewee import *

db = SqliteDatabase('students.db')

class Student(Model): username = CharField(max_length=255, unique=True) #field that holds characters points = IntegerField(default=0)

class Meta:  #isn't a meta class
    database = db

students = [ {'username': 'liz', 'points':288}, {'username': 'chalkers', 'points':1912}, {'username': 'joy', 'points':2348}, {'username': 'peter', 'points':258}, {'username': 'davidcraig', 'points':25256} ]

def add_students(): for student in students: try: Student.create(username=student['username'], points=student['points']) except IntegrityError: student_record = Student.get(username=student['username']) student_record.points = student['points'] student_record.save()

if name == 'main': db.connect() db.create_tables([Student], safe=True) #Peewee won't break add_students()