Initializing a django project

Initializing a project

install conda env for this project conda create --name mydjangoenv python=3.8
Activate conda env and Install Django pip install django
using django-admin startproject withme . to create the project in the current directory
Run server by using python manage.py runserver
Create a pages directory using python manage.py startapp pages (in conda env)
add app config definition in withme/setting.py
Create a new directory named template, which has two directories and base.html, pages(other pages) and partials(the partials of base.html)
In withme/setting.py, set the path of template: 'DIRS': [os.path.join(BASE_DIR, 'template')]
Create a new directory named static in withme folder, which includes Static files (CSS, JavaScript, Images)
In withme/setting.py, set the path of static,
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```
STATIC_ROOT = os.path.join(BASE_DIR, 'static')
STATIC_URL = 'static/'
STATICFILES_DIRS = [
    os.path.join(BASE_DIR, 'withme/static')
]
```
run python manage.py collectstatic to create a static directory outside of withme folder, and add this folder to .gitignore

In the first time, Add a page using 3 steps:

In pages/views.py, write a view

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from django.http import HttpResponse
def index(request):
    return HttpResponse("Hello")

or render a page

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from django.shortcuts import render
def index(request):
    return render(request, 'pages/index.html')

Create a URLconf in pages/urls.py(need to add this file)

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from django.urls import path
from . import views

urlpatterns = [
    path('', views.index, name='index')
]

Point the root URLconf at the pages.urls module. In withme/urls.py

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from django.contrib import admin
from django.urls import path, include # add include

urlpatterns = [
    path('', include('pages.urls')), # add a url to urlpatterns
    path('admin/', admin.site.urls),
]

Create a new app (posts)

In template, create a folder called posts, which includes 3 files, 'post' 'posts' 'search'
- Each file using this code to init
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```
{% extends 'base.html' %}

{% block content %}
<h1>listings</h1>
{% endblock %}
```
python manage.py startapp posts tp create a new app posts

add app config in withme/settings.py

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# Application definition
INSTALLED_APPS = [
    'pages.apps.PagesConfig',
    'posts.apps.PostsConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

In withme/urls.py, Add a URL to urlpatterns path('posts/', include('posts.urls')),
Create a url.py file in post app, copy the code in pages/urls.py

Database setup

install postgreSQL16 and pgadmin4
open terminal: type in this

postgres=# \password postgres
Enter new password for user "postgres":
Enter it again:
postgres=# CREATE DATABASE withme OWNER postgres;
CREATE DATABASE
create a server in pgadmin, and in withme database, set some infos
pip install psycopg2
pip install psycopg2-binary
change data setting in withme/settings.py

from

DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}

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DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'withme',
        'USER': 'postgres',
        'PASSWORD': '123456',
        'HOST': 'localhost'
    }
}

pip install Pillow
Design database
pythpm manage.py makemigrations
python manage.py migrate
refresh servers in pgadmin, and check if they create table

Design database

design schemas
write models in (ex.) listings/models.py
If you add foreignKey, you need to import other model

Create superuser

go to localhost:8000/admin/
python manage.py createsuperuser to create a super user called administrator and password is 123456

Register models with admin

register models in listings/admin.py
reload django administration page, you can see there is a listings model

Media folder

add Media folder setting, just like static folder setting we did before
add url to urlpatterns

in localhost/admin, add some realtors and listings, the image that have been uploaded will display inside media folder(auto-create)

Custom the admin page

go to template, create admin/base_site.html, and then custom

if you want to custom the data display, like not just show title(name) instead of other field, goto listings/admin.py

Pull data from listing model

listings/views.py

import models