Merge pull request 'Added custom command to create example data' (#92) from example-data into release
Reviewed-on: https://gitea.pangea.org/trustchain-oc1-orchestral/IdHub/pulls/92
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@ -0,0 +1,293 @@
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import random
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from typing import Type, Callable, List
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from django.core.management.base import BaseCommand
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from django.db import models, IntegrityError
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from idhub.models import Event, Rol, Service, UserRol
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from idhub_auth.models import User
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from faker import Faker
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DEFAULT_OBJECTS_CREATED: int = 30
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RANDOM_STRING_LENGTH: int = 30
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EMAIL_RANDOM_STRING_LENGTH: int = 10
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EXISTING_EVENTS: int = 30
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fake = Faker()
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class Command(BaseCommand):
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"""
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Populate the database with dummy values.
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You can either specify which model to create objects for,
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or create objects for all models.
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If no data is specified it will create 30 events, users,
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services, roles, and user roles.
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"""
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help = 'Populate the database with dummy values for testing.'
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def __init__(self, *args, **kwargs):
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"""
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In the context of a Django management command,
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initializing lists like created_users in the constructor ensures
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that each run of the command has its own set of users, services,
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roles, etc., and does not unintentionally share or retain state
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across different invocations of the command.
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"""
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super().__init__(*args, **kwargs)
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self.created_users = []
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self.created_services = []
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self.created_roles = []
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def handle(self, *args, **options):
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any_option_used = self.process_options(options)
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if not any_option_used:
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self.create_all()
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def process_options(self, input_options):
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option_methods = {
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'events': self.create_events,
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'users': self.create_users,
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'superusers': self.create_superusers,
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'services': self.create_services,
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'roles': self.create_roles,
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'userroles': self.create_user_roles,
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'userrole': self.create_specific_user_role,
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'register': self.register_user,
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'register_superuser': self.register_superuser,
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'amount': self.create_all
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}
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any_option_used = self.match_input_to_options(input_options,
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option_methods)
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return any_option_used
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def match_input_to_options(self, input_options, option_methods):
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any_option_used = False
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for option, method in option_methods.items():
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is_valid_option = option in input_options and input_options[
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option] is not None
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if is_valid_option:
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self.call_selected_method(input_options, method, option)
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any_option_used = True
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return any_option_used
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def call_selected_method(self, input_options, method, option):
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args = self.create_argument_list(input_options, option)
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method(*args)
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def create_argument_list(self, input_options, option):
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if isinstance(input_options[option], list):
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args = input_options[option]
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else:
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args = [input_options[option]]
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return args
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def add_arguments(self, parser):
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parser.add_argument(
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'--amount', type=int, action='store',
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help='Create N objects (includes events, users, services, roles, and user roles)'
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)
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parser.add_argument('--events', type=int,
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help='Create the specified number of events')
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parser.add_argument('--users', type=int,
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help='Create the specified number of users')
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parser.add_argument('--superusers', type=int,
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help='Create the specified number of superusers')
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parser.add_argument('--services', type=int,
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help='Create the specified number of services')
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parser.add_argument('--roles', type=int,
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help='Create the specified number of roles')
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parser.add_argument('--userroles', type=int,
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help='Create the specified number of user roles')
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parser.add_argument(
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'--userrole', nargs=2, type=str,
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help='Create a user role for user U and service S',
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metavar=('U', 'S'),
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)
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parser.add_argument('--register', nargs=2, type=str,
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help='Create a user with email EMAIL and password PW',
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metavar=('EMAIL', 'PW'))
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parser.add_argument('--register-superuser', nargs=2, type=str,
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help='Create a superuser with email EMAIL and '
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'password PW',
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metavar=('EMAIL', 'PW'))
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def register_user(self, email: str, password: str):
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"""
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Register a new user with the given email and password from the command line.
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"""
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try:
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self.create_user(email, password)
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self.stdout.write(f"Successfully registered user: {email}")
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except IntegrityError:
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self.stdout.write(f"Failed to register user: {email}")
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def register_superuser(self, email: str, password: str):
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"""
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Register a new superuser with the given email and password from the command line.
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"""
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try:
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self.create_superuser(email, password)
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self.stdout.write(f"Successfully registered superuser: {email}")
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except IntegrityError:
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self.stdout.write(f"Failed to register superuser: {email}")
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def create_all(self, amount=DEFAULT_OBJECTS_CREATED):
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self.create_events(amount)
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self.create_users(amount)
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self.create_roles(amount)
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self.create_services(amount)
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self.create_user_roles(amount)
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def create_objects(self, model: Type[models.Model],
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data_generator: Callable, amount: int) -> List[
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models.Model]:
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"""
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Generic method to create objects for a given model and keep track of them.
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Args:
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model: The Django model class for which objects are to be created.
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data_generator: A function that returns a dictionary of attributes for creating a model instance.
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amount: The number of objects to create.
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Returns:
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A list of successfully created model instances.
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"""
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created_objects = []
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for _ in range(amount):
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try:
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model_instance = self.create_from_data(data_generator, model)
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created_objects.append(model_instance)
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except IntegrityError:
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self.print_failure_message(model)
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self.print_amount_created(created_objects, model)
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return created_objects
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def create_users(self, amount: int):
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def user_data():
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return {
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'email': fake.email(),
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'first_name': fake.first_name(),
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'last_name': fake.last_name()
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}
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created_users = self.create_objects(User, user_data, amount)
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self.created_users.extend(created_users)
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def create_events(self, amount: int, user=None):
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def event_data():
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return {
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'type': random.randint(1, EXISTING_EVENTS),
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'message': fake.paragraph(nb_sentences=3),
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'user': user
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}
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self.create_objects(Event, event_data, amount)
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def create_superusers(self, amount=0):
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"""Superusers can only be created from the specific command"""
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created_superuser_amount = 0
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for value in range(0, amount):
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email = fake.email()
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try:
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User.objects.create_superuser(email)
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created_superuser_amount += 1
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except IntegrityError:
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self.stdout.write("Couldn't create superuser " + email)
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self.stdout.write(f"Created {created_superuser_amount} users")
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def create_services(self, amount: int):
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def service_data():
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domain = fake.text(max_nb_chars=200)
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description = fake.text(max_nb_chars=250)
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return {
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'domain': domain,
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'description': description,
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}
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created_services = self.create_objects(Service, service_data, amount)
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self.associate_random_roles(created_services)
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self.created_services.extend(created_services)
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def create_roles(self, amount: int):
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def role_data():
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name = fake.job()
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description = fake.text(max_nb_chars=250)
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return {'name': name, 'description': description}
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created_roles = self.create_objects(Rol, role_data, amount)
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self.created_roles.extend(created_roles)
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def create_user_roles(self, amount: int, user_id=None, service_id=None):
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def user_role_data():
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user = self.get_or_create_user(user_id)
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service = self.get_or_create_service(service_id)
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return {"user": user, "service": service}
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self.create_objects(UserRol, user_role_data, amount)
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def create_specific_user_role(self, user, service):
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self.create_user_roles(1, user, service)
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def create_user(self, email: str, password: str):
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User.objects.create_user(email, password)
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def create_superuser(self, email: str, password: str):
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User.objects.create_superuser(email, password)
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def print_failure_message(self, model):
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self.stdout.write(f"Couldn't create {model.__name__} object.")
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def print_amount_created(self, created_objects, model):
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self.stdout.write(f"Created {len(created_objects)} "
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f"{model.__name__} objects")
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def create_from_data(self, data_generator, model):
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model_instance = model.objects.create(**data_generator())
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return model_instance
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def associate_random_roles(self, created_services):
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for service in created_services:
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self.associate_service_to_random_roles(service)
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def associate_service_to_random_roles(self, service):
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associated_roles = [self.get_or_create_role() for _ in range(
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random.randint(0, 2))]
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service.rol.set(associated_roles)
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def get_or_create_user(self, user_id):
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if user_id is not None:
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user = User.objects.get(user_id=user_id)
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elif len(self.created_users) != 0:
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user = random.choice(self.created_users)
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else:
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self.create_users(1)
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user = self.created_users[0]
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return user
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def get_or_create_service(self, service_id):
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if service_id is not None:
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service = Service.objects.get(service_id=service_id)
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elif len(self.created_services) != 0:
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service = random.choice(self.created_services)
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else:
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self.create_services(1)
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service = self.created_services[0]
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return service
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def get_or_create_role(self):
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if len(self.created_roles) != 0:
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role = random.choice(self.created_roles)
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else:
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self.create_roles(1)
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role = self.created_roles[0]
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return role
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@ -13,3 +13,4 @@ jsonref==1.1.0
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pyld==2.0.3
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more-itertools==10.1.0
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dj-database-url==2.1.0
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faker==21.0.0
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