django part-1

Aug 2, 20230 likes61 views

The model provides data from the database as an ORM to make working with databases easier than SQL. Templates use HTML and Django tags to display data from views. Django uses urls.py to map URLs to views, which import data from models.py to send to templates for display.

The model provides data from the database.
In Django, the data is delivered as an Object Relational Mapping
(ORM), which is a technique designed to make it easier to work with
databases.
The most common way to extract data from a database is SQL. One
problem with SQL is that you have to have a pretty good
understanding of the database structure to be able to work with it.
Django, with ORM, makes it easier to communicate with the database,
without having to write complex SQL statements.
The models are usually located in a file called models.py.

A template is a file where you describe how the result
should be represented.
Templates are often .html files, with HTML code describing
the layout of a web page, but it can also be in other file
formats to present other results, but we will concentrate on
.html files.
Django uses standard HTML to
describe the layout, but uses
Django tags to add logic:
<h1>My Homepage</h1>
<p>My name is {{ firstname
}}.</p>
The templates of an application is located in a folder
named templates.

Django also provides a way to
navigate around the different pages
in a website.
When a user requests a URL, Django
decides which view it will send it to.
This is done in a file called urls.py.

1 - Django receives the URL,
checks the urls.py file, and calls
the view that matches the URL.
2 - The view, located in views.py,
checks for relevant models.
3 - The models are imported
from the models.py file.
4 - The view then sends the data
to a specified template in
the template folder.
5 - The template contains HTML
and Django tags, and with the
data it returns finished HTML
content back to the browser.

Note: You must activate the
virtual environment every time
you open the command prompt to
work on your project.

Note: Now you have installed Django in your new project,
running in a virtual environment!

Navigate to where in the file system you
want to store the code (in the virtual
environment), and run this command in
the command prompt:
django-admin startproject myworld

Django creates a myworld folder on my
computer, with this content:
myworld
manage.py
myworld/
__init__.py
asgi.py
settings.py
urls.py
wsgi.py

Now that you have a Django
project, you can run it, and see
what it looks like in a browser.
Navigate to the /myworld folder
and execute this command in
the command prompt:
py manage.py runserver

Django views are Python functions
that takes http requests and returns
http response, like HTML documents.
A web page that uses Django is full of
views with different tasks and
missions.
Views are usually put in a file
called views.py located on your app's
folder.

When we created the Django project, we got an empty SQLite
database. It was created in the myworld root folder.
We will use this database in this session.

To add some HTML around the
values, we will create a template
for the application.
All templates must be located in
the templates folder off your app,
if you have not already created
a templates folder, do it now.

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django part-1

7. The model provides data from the database. In Django, the data is delivered as an Object Relational Mapping (ORM), which is a technique designed to make it easier to work with databases. The most common way to extract data from a database is SQL. One problem with SQL is that you have to have a pretty good understanding of the database structure to be able to work with it. Django, with ORM, makes it easier to communicate with the database, without having to write complex SQL statements. The models are usually located in a file called models.py.

9. A template is a file where you describe how the result should be represented. Templates are often .html files, with HTML code describing the layout of a web page, but it can also be in other file formats to present other results, but we will concentrate on .html files. Django uses standard HTML to describe the layout, but uses Django tags to add logic: <h1>My Homepage</h1> <p>My name is {{ firstname }}.</p> The templates of an application is located in a folder named templates.

10. Django also provides a way to navigate around the different pages in a website. When a user requests a URL, Django decides which view it will send it to. This is done in a file called urls.py.

11. 1 - Django receives the URL, checks the urls.py file, and calls the view that matches the URL. 2 - The view, located in views.py, checks for relevant models. 3 - The models are imported from the models.py file. 4 - The view then sends the data to a specified template in the template folder. 5 - The template contains HTML and Django tags, and with the data it returns finished HTML content back to the browser.

17. Note: You must activate the virtual environment every time you open the command prompt to work on your project.

18. Note: Now you have installed Django in your new project, running in a virtual environment!

21. Navigate to where in the file system you want to store the code (in the virtual environment), and run this command in the command prompt: django-admin startproject myworld

22. Django creates a myworld folder on my computer, with this content: myworld manage.py myworld/ __init__.py asgi.py settings.py urls.py wsgi.py

23. Now that you have a Django project, you can run it, and see what it looks like in a browser. Navigate to the /myworld folder and execute this command in the command prompt: py manage.py runserver

30. Django views are Python functions that takes http requests and returns http response, like HTML documents. A web page that uses Django is full of views with different tasks and missions. Views are usually put in a file called views.py located on your app's folder.

42. When we created the Django project, we got an empty SQLite database. It was created in the myworld root folder. We will use this database in this session.

55. To add some HTML around the values, we will create a template for the application. All templates must be located in the templates folder off your app, if you have not already created a templates folder, do it now.

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django part-1

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