status: #doc 
Tags: #python/django 
links:
Date: 2024-06-22
___
# views

## making simple functional view

- in my_app folder inside views.py add
```python
# index() ==> Hello World
def index(request):
	return HttpResponse("Hello World")
```

- and import `HttpResponse` form `django.shortcuts` with adding it to first line like below
```python
from django.shortcuts import render,HttpResponse
```

> [!INFO] what it do?
> we get client request and then we response with text hello_world, note that we use `HttpResponse` so we can use text to answer client and request is what we get from client    

# urls

## add simple url

- first import your view like this
```python
from my_app.views import index
```

- go to config or your project folder inside of url.py file route to home like this
```python
# my_site.com/ ==> index() 
urlpatterns = [
	path('',index),
]
```

> [!INFO] 
> urls are used to route requests to views
> for checking witch view we call we use urlpatterns list
> 

>[!info]
> its better to add / to end of path , example: about or about/ both fire same view 

# dynamic routing

when we want to load pages base on variables we send variables from urls ==> views/functions and it will produce our page base on variables 

- Example :
we send name of person in url and it say hello to them

for this first we want to get person name from url

## send variable from urls

- first we send variable to view we want (we can first make url or view it doesn't matter)
```python

from my_app.views import hello

# path ('adreess_you_want/<type_of_variable:variable>/',name_of_view)
# my_site.com/hellome/first_name ==> hello(first_name) 
urlpatterns = [
	path('hellome/<str:first_name>',hello),
]
```

## receive variable in views 

inside views.py we add this

```python
def hello(request,first_name):
	return HttpResponse(f"Hello {first_name}")
```

# using templates

inside views.py we use render function like this

-  app level template
```python
def hello(request):
	return render(request,"my_project/home.html")
```

- inline variables
```python
def hello(request):
	return render(request,"my_project/home.html",{'my_var':'bar' })
```

-  context
```python
def hello(request):
	context:{
		movies:["avatar,matrix,spider-man"]
	}
	return render(request,"my_project/home.html",context)
```

- url variables ??? 



---
# References