starting server in django
# to start a django server cd to dir with manage.py file and type following
python manage.py runserverstarting server in django
# to start a django server cd to dir with manage.py file and type following
python manage.py runserverrun django app
$ python manage.py runserverdjango runpython
from django.db import migrations
def forwards_func(apps, schema_editor):
# We get the model from the versioned app registry;
# if we directly import it, it'll be the wrong version
Country = apps.get_model("myapp", "Country")
db_alias = schema_editor.connection.alias
Country.objects.using(db_alias).bulk_create([
Country(name="USA", code="us"),
Country(name="France", code="fr"),
])
def reverse_func(apps, schema_editor):
# forwards_func() creates two Country instances,
# so reverse_func() should delete them.
Country = apps.get_model("myapp", "Country")
db_alias = schema_editor.connection.alias
Country.objects.using(db_alias).filter(name="USA", code="us").delete()
Country.objects.using(db_alias).filter(name="France", code="fr").delete()
class Migration(migrations.Migration):
dependencies = []
operations = [
migrations.RunPython(forwards_func, reverse_func),
]django basic steps
# --------- Basic steps for working with Django on a MAC ---------- #
1º - Create a virtual environment by giving this command:
>> python3 -m venv "name_of_env"
2º - Activate this virtual environment:
>> source "name_of_env"/bin/activate
3º - Now you can install Django:
>> pip3 install django
4º - To initiate a project in Django:
>> django-admin startproject "projectName"
>> cd projectName
5º - To run the server, you need to go to the directory containing
manage.py and from there enter the command:
>> python3 manage.py runserver
6º - To create a basic app in your Django project you need to go
to the directory containing manage.py and from there enter
the command:
>> python3 manage.py startapp "projectAppName"
7º - You need to include the app in our main project so that
urls redirected to that app can be rendered. Move to
"projectName" -> "projectName" -> urls.py and change the
following:
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
# Enter the app name in following syntax for this to work
path('', include("projectApp.urls")),
]django run command from code
from django.core.management import call_command
call_command('my_command', 'foo', bar='baz')Copyright © 2021 Codeinu
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