Elros

Question 1

How to migrate?

Answer 1

Never makemigrations without app_name.
Only python manage.py makemigrations app_name
You should also use python manage.py migrate

Question 2

5 Checks before commit

Answer 2

1. CRUD works
2. Add doc strings
3. Remove unnecessary comments (search ‘#’)
4. Remove prints (search ‘print’)
5. Fix imports

Question 3

New ticket git flow

Answer 3

git switch dev
git pull
git checkout -b EXTEDU-44_fix_EducationProgram

git status # Check all changed files (Commit Side Tab provides diff-view)
git add .
git commit -m ‘EXTEDU-44 Payer CRUD on Navigator’

git switch dev
git pull
# PyCharm - Git: Merge LOCAL (!) EXTEDU-44 into dev
git push

Question 4

Виртуальная модель для отображения одного элемента требует …

Answer 4

ID либо с Навигатора, либо добавления вручную

Question 5

git naming convention

Answer 5

enrollment-fix
1. lower-case (minuscule)
2. dashes as space

Question 6

Сделать форму рид онли

Добавить win и contract из params
Задать условие
Задать для формы ридонли

Answer 6

ui.py / set_params

self.win = win
contract = params['object']
        if not params['create_new'] and not contract.is_active:
            self.win.form.make_read_only()

Question 7

Передать в params ключ-значение

В get_edit_window_params передать ключ-значение

Answer 7

actions /

def get_edit_window_params(self, params, request, context):
    params = super().get_edit_window_params(params, request, context)
    params['current_unit_id'] = get_current_unit_id(request)
    return params

ui /

def set_params(self, win, params):
    current_unit_id = params['current_unit_id']
    current_unit = Unit.objects.get(id=current_unit_id)

    self.field\_\_unit_id.value = current_unit.id
    self.field\_\_unit_id.default_text = current_unit.full_name
    self.field\_\_unit_id.hidden = True

Question 8

ForeignKey field name

Answer 8

self.field_name_id
Always add _id

Question 9

Debug

Answer 9

Ломай/отключай части кода и смотри, что меняется.

Question 10

Если нет таблицы в DataBase View

Answer 10

1. Проверить миграции приложения
2. Обновить вид в таблице(CTRL+F5)

Question 11

Find app name for making migrations

Answer 11

Check apps.py within the app folder

Question 12

Get entries from navigator

Answer 12

{navigator}/api/contract-pf?number=110

Question 13

Build django container (from scratch downloading all components)

Answer 13

docker-compose -f docker-compose.yml up -d --build django

Question 14

Recreate container without rebuilding it from scratch

Answer 14

docker-compose up -d --force-recreate

Question 15

Install Python 3.10 on Ubuntu 23.04

Answer 15

Install pyenv following the readme https://github.com/pyenv/pyenv
Edit bashrc and install python 3.10.5

In Pycharm select Python from home/.pyenv/versions

Question 16

Rebuild running containers

Answer 16

docker-compose up -d --force-recreate

Question 17

Check pending migrations without applying them

Answer 17

python manage.py makemigrations --dry-run

Question 18

Output the migration file for dry run

Answer 18

python manage.py makemigrations payer --dry-run --verbosity 3

Question 19

How to see environmental variables in a docker container?

Answer 19

env
printenv
docker exec <container_id> env

Question 20

Что делать если миграции не выполняются?

Answer 20

Удалить файлы миграций и записи в БД django_migrations в поле app

Question 21

Create named migrations

Answer 21

python manage.py makemigrations --name changed_my_model your_app_label

Question 22

SQL: Удалить колонку

Answer 22

ALTER TABLE public.education_program_educationprogrammodule DROP COLUMN in_occupancy;

Question 23

Clean M2M relations to delete object

Answer 23

#models.py
@atomic
def safe_delete(self):
		self.author.clear()
		self.departments.clear()
		self.languages.clear()
		return super().safe_delete()

Question 24

AssertionError: Cant find pack for field declaration (realated model Declaration)

Answer 24

#ui.py
    field_fabric_params = dict(
        model_register=ModelRegister({
            'Unit': 'extedu.declaration.actions.DeclarationPack',
        }),
        field_list=(

Question 25

Как избежать циркулярного импорта?

Answer 25

Вместо прямого импорта модели использовать `declaration_model = apps.get_model('declaration', 'Declaration')`

Question 26

Time function duration

Answer 26

``` import time start = time.time() print(f'{time.time() - start:.4f} s') ```