dev

Development log

• Added .gitignore
• Virtual environment
  • Installed conda https://docs.conda.io/projects/miniconda/en/latest/
  • Created new, plain virtual environment:
    (only python package installed, pip installed, see conda list)
    conda create --name events python
  • conda activate events
  • pip freeze > requirements_dev.txt
  • python --version -> Python 3.11.5
• pip install Django
  • pip freeze > requirements_dev_1_django.txt
• python -m django startproject event_management
• python .\manage.py startapp events
• python .\manage.py makemigrations events
• python .\manage.py migrate
• python manage.py createsuperuser
• python manage.py runserver
• Notes branch
  • git switch --orphan notes
  • git commit --allow-empty -m "created branch"
  • git push -u origin notes

TODO

• Learned: Delete (database and) migrations, except of init.py to revert migrations https://simpleisbetterthancomplex.com/tutorial/2016/07/26/how-to-reset-migrations.html
• Learned: In models.py for models.ForeignKey
  • Only 'blank=True' results in IntegrityError
  • Only 'blank=True' results in 'This field is required' in saving in admin view
  • 'null=True' results in 'null has no effect on ManyToManyField' in 'python manage.py createsuperuser'
• models.py: Check deletion cases (CASCADE), https://docs.djangoproject.com/en/4.2/ref/models/fields/#django.db.models.ForeignKey.on_delete
• models.py: Check if working: 'self' https://docs.djangoproject.com/en/4.2/ref/models/fields/#module-django.db.models.fields.related

Notes 2023-09-22

• 13:45 Meeting
  • Proof of concept: Simplified course registration.
  • Who has registered?
  • Are cancellations possible?
  • How many participants?
  • Name, first name, unit, country, tech level, email
  • Flag: Approved by manager ("Bedarfsmeldung")
  • Course: Name, description, day, time
• 17:40 Chat
  • There are two levels: Supervisor and unit leader
  • In principle, we need a supervisor or a representative

Model 2023-09-22

                      +--+
                  m:n |  | representative of
                      +  v

      +------+  1:n  +------------+       +------------------------+
      | Unit | +---+ | Person     | +---+ |  Course                |
      +------+       |            |  m:n  |                        |
                     | First name |       |  Name                  |
   +---------+  1:n  | Last name  |       |  Description           |
   | Country | +---+ | Email      |       |  Day                   |
   +---------+       |            |       |  Time                  |
                     |            |       |  Maximum participants  |
+------------+  1:n  |            |       |  Cancellation possible |
| Tech Level | +---+ |            |       |                        |
+------------+       +------------+       +------------------------+

                      +  ^       +         +
        supervisor of |  | 1:n   | 1:n     | 1:n
                      +--+       +         +

                               +--------------+
                               | Registration |
                               |              |
                               | (Registered) |
                               | Approved     |
                               | Cancelled    |
                               +--------------+
https://asciiflow.com/legacy/

• Course: It's Event, not Course
• Event: Should be not active until published
• Event -> Cancelable: What's the meaning? Can participants cancel? Can event be canceled?
  Better: Canceled instead of Cancelable
• Event: End time or duration missing
• Event: No registration required? (in leisure time)
• Note: Event<->Person is ownership; participants handled via Registration
• Unit: TechLead Teams? Other units in other countries? Depending on pillar?
• Tech Level: Correct name? Which Tech Levels exist?
• Note: Supervisor has to approve registrations
• Note: Representatives have same rights (e.g. for vacations).
• Registration -> Registered: Not required, will be created when registered
• Registration -> Canceled: Not required, just delete
• Person: Who can have representatives? -> Has to be a supervisor (approving participation)
• Person: Who can set supervisors? -> Has to be a moderator

Model 2023-09-27

                      +--+
                  m:n |  | representatives
                      +  +

                     +------------+ organizes +----------------------+
      +------+  1:n  | Person     | +-------+ | Event                |
      | Unit | +---+ |            |    m:n    |                      |
      +------+       | First name |           | Title                |
                     | Last name  |           | Description          |
   +---------+  1:n  | Email      |           | Day                  |
   | Country | +---+ | Supervisor |           | Begin time           |
   +---------+       | Moderator  |           | Duration             |
                     |            |           | Maximum participants |
+------------+  1:n  |            |           | Published            |
| Tech Level | +---+ |            |           | Canceled             |
+------------+       |            |           | Leisure              |
                     +------------+           +----------------------+

                      +  ^       +             +
           supervisor |  | n:1   | 1:n         | 1:n
                      +--+       +             +

                                +--------------+
                                | Registration |
                                |              |
                                | Approved     |
                                | Canceled     |
                                +--------------+


https://asciiflow.com/legacy/