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Python Using Databases in Python Meet Peewee Queries Are Your Friend

Posted by Blaine McCarthy
Blaine McCarthy
17,030 Points

Try/Except throwing internal error

Pasting the code below - everything worked right up until the try/except was added to catch the duplicates. I'm using postgreSQL, but looking at the docs there shouldn't get a difference on create? Anyone see anything?

Traceback (most recent call last):
  File "/Users/bmac413/Dev/pythonpostgres/Treehouse/students.py", line 39, in <module>
    add_students()
  File "/Users/bmac413/Dev/pythonpostgres/Treehouse/students.py", line 30, in add_students
    student_record = Student.get(username=student['username'])

peewee.InternalError: current transaction is aborted, commands ignored until end of transaction block

My code:

from peewee import *

psql_db = PostgresqlDatabase('students',user='postgres')

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

    class Meta:
        database = psql_db

students = [
    {"username":"Bob",
     "points": 456},
    {"username": "John",
     "points": 344},
    {"username": "Jim",
     "points": 476},
    {"username": "Greg",
     "points": 500},
    {"username": "Pat",
     "points": 329},
]

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__":
    psql_db.connect()
    psql_db.create_tables([Student], safe=True)
    add_students()
juanreyes7
juanreyes7
4,070 Points
juanreyes7
juanreyes7
4,070 Points

The same thing happened to me, using Postgresql. I'll post here if I find a solution.