endorsement/test.py

import random
import string

from app import db
from models import Achievement, User

db.drop_all()
db.create_all()

persoonA = User(id="AAA")
persoonB = User(id="BBB")
persoonC = User(id="CCC")

achievementA = Achievement(name="AA", achieved_by=persoonA.id)
achievementB = Achievement(name="BB", achieved_by=persoonB.id)

achievementA.endorsed_by.append(persoonC)

# Long generated lists
for i in range(30):
    achievement = Achievement(name=''.join(
        random.choices(string.ascii_uppercase + string.digits, k=6)),
                              achieved_by=persoonA.id)
    db.session.add(achievement)

people = [
    User(id=''.join(random.choices(string.ascii_uppercase +
                                   string.digits, k=6))) for i in range(30)
]

for person in people:
    db.session.add(person)
    achievementA.endorsed_by.append(person)

db.session.add(persoonA)
db.session.add(persoonB)
db.session.add(persoonC)

db.session.add(achievementA)
db.session.add(achievementB)

db.session.commit()