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Python

James N
James N
17,864 Points
Posted by James N
James N
17,864 Points

not getting error when supposed to LOL

on the video: "Queries are your friend" for the Python course: "Using databases in python", i'm not getting an error when i'm supposed to! the teacher said that the first time the program is ran, at 03:59, it works fine, followed by, the second time, errors popping up. no errors are popping up for me! here's my code:

students.py 
from peewee import *

db = SqliteDatabase("students.db")


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

    class Meta:
        databse = db

students = [{"username": "kennethlove",
            "points": 4888},
           {"username": "jamesn",
            "points": 12999},
           {"username": "bobthezombie",
            "points": 0}]

def add_students():
  for student in students:
    Student.create(username=student["username"],
                  points=student["points"])

if __name__ == "__main__":
    db.connect()
    db.create_tables([Student], safe=True)
    db.close()

and my output:

output.txt 
treehouse:~/workspace$ python students.py                                                                                                                                                                        
treehouse:~/workspace$ python students.py                                                                                                                                                                        
treehouse:~/workspace$ python students.py                                                                                                                                                                        
treehouse:~/workspace$ python students.py                                                                                                                                                                        
treehouse:~/workspace$

as you can see, i ran this a few times. thanks for your help!

1 Answer

James N
James N
17,864 Points
James N
James N
17,864 Points

oh! i think i fixed it! all i did, was forget to call add_students() but i fixed it! i fixed it later on in the video so i didn't get any errors on uniqueness.

here's my UPDATED code:

students_updated.py 
from peewee import *

db = SqliteDatabase("students.db")


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

    class Meta:
        databse = db

students = [{"username": "kennethlove",
            "points": 4888},
           {"username": "jamesn",
            "points": 12999},
           {"username": "bobthezombie",
            "points": 0}]

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

if __name__ == "__main__":
    db.connect()
    db.create_tables([Student], safe=True)
    add_students()   #fixed!
    db.close()