Django

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DJANGO - ORM lookup classees

Posted in Uncategorized by v.udartsev on October 02, 2020

**Django 3.***

Доступные подклассы для выборки запросов типа:
"user_name__icontains"
"user_name__iregex"
"user_name__startswith"
django.db.models.query_utils :
  'contained_by':     <class 'django.contrib.postgres.fields.ranges.RangeContainedBy'>,
  'gte':              <class 'django.db.models.lookups.IntegerGreaterThanOrEqual'>,
  'lt':               <class 'django.db.models.lookups.IntegerLessThan'>,
  'contains':         <class 'django.db.models.lookups.Contains'>,
  'endswith':         <class 'django.db.models.lookups.EndsWith'>,
  'exact':            <class 'django.db.models.lookups.Exact'>,
  'gt':               <class 'django.db.models.lookups.GreaterThan'>,
  'gte':              <class 'django.db.models.lookups.GreaterThanOrEqual'>,
  'icontains':        <class 'django.db.models.lookups.IContains'>,
  'iendswith':        <class 'django.db.models.lookups.IEndsWith'>,
  'iexact':           <class 'django.db.models.lookups.IExact'>,
  'in':               <class 'django.db.models.lookups.In'>,
  'iregex':           <class 'django.db.models.lookups.IRegex'>,
  'isnull':           <class 'django.db.models.lookups.IsNull'>,
  'istartswith':      <class 'django.db.models.lookups.IStartsWith'>,
  'lt':               <class 'django.db.models.lookups.LessThan'>,
  'lte':              <class 'django.db.models.lookups.LessThanOrEqual'>,
  'range':            <class 'django.db.models.lookups.Range'>,
  'regex':            <class 'django.db.models.lookups.Regex'>,
  'startswith':       <class 'django.db.models.lookups.StartsWith'>,

DJANGO - clean run

Posted in Programming by v.udartsev on June 18, 2020

1) Install requirements.txt

pip install -r requirements.txt
(same: cat requirements.txt | xargs -n 1 pip install)

2) Create migrations:

python manage.py makemigrations
python manage.py migrate

3) Make seeds:

python manage.py seed all
python manage.py seed all --refresh

Superuser:

admin
admin (or `SUPERUSER_PASS={password}` in env)

Django template error fix:

first install: pip install django==2.2 then install: pip install django==3.0.2

Install Python 3.9

sudo apt install software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt update
sudo apt install python3.9
python3.9 --version

Installing ENV (linux):

sudo apt install python3.9-venv
python3.9 -m pip install --user --upgrade pip
python3.9 -m pip install --user virtualenv
python3.9 -m venv env
source env/bin/activate
pip install --upgrade pip
pip install -r requirements.txt
pip install --upgrade -r requirements.txt  # upgrade all packages
deactivate

Update ENV and requirements.txt (linux)

pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip install -U
pip freeze > requirements.txt

pip install pipupgrade
pipupgrade --verbose --latest --yes
pip freeze > requirements.txt

LINUX BASH

1) Deletes all DJANGO migrations:

cd {django-project-folder}/
find . -path "*/migrations/*.py" -not -name "__init__.py" -not -path "*/geodata/*" -delete
find . -path "*/migrations/*.pyc" -not -path "*/geodata/*" -delete

CELERY ON LOCALHOST

celery -A core_backend worker --loglevel=DEBUG

REDIS RESVER 6+

sudo add-apt-repository ppa:chris-lea/redis-server
sudo apt-get update
sudo apt-get install redis-server

ERRORS:

https://github.com/django/daphne/issues/262 https://stackoverflow.com/questions/55916808/django-channels-reader-at-end-of-file-exception