Django Slug Tutorial: Readable URLs

Refer to

• django-slug-tutorial
• #django.utils.text.slugify
• Generating slugs automatically in Django without packages - Two easy and solid approaches (added on 2020/8/5)
  

urls.py 

urlpatterns = [ 
    path('post/<str:slug>', views.post_detail, name='post_detail'),
]

The code refer from https://github.com/Radi85/django-website.git, under its section blog/models.py: 

class Post(models.Model):  
    ... 
    slug = models.SlugField(max_length=200, null=False, unique=True,                             
                            blank=True, verbose_name="Slug (Not required)")
    def set_slug(self):                                                                          
        if not self.slug:                                                                
        # if Post.objects.filter(slug__isnull=True):                                     
            # Newly created object, so set slug                                          
            _title = self.title                                                              
            unique_slug = self.slug = slugify(_title, allow_unicode=True)                
            count = 1                                                                                
            # Keep checking if the new generated slug exists                             
            while Post.objects.filter(slug=unique_slug).exists():
                unique_slug = "{}-{}".format(self.slug, count)                           
                count += 1                                                                           
            self.slug = unique_slug                                                                                                                                                   
    def save(self, *args, **kwargs):                                                     
        self.set_slug()
        super(Post, self).save(*args, **kwargs)                                                  

Bootstrap: Align navbar's font with h1, h2, ..

Refer to here.

CSS code: 

h1,
.navbar-brand,
.navbar-nav a {
  font-family: 'Merriweather', serif;
}

check here to look which font you like: CSS Font stack

Bootstrap 4: Autohide navbar when scroll down

So my code was reference to: Stackoverflow

and its relative code: HERE

CSS: 

.navbar-tran {
    transition: top 1.0s ease;
}

.navbar-hide {
    top: -56px;
}

HTML:

<nav class="navbar navbar-tran navbar-expand-lg sticky-top navbar-dark bg-dark">
...

jQuery:

/* When the user scrolls down, hide the navbar. 
 * When the user scrolls up, show the navbar */
// document ready
(function ($) {
    
var previousScroll = 56;
    // scroll functions
    $(window).scroll(function(e) {                                                       
    
        // add/remove class to navbar when scrolling to hide/show
        var scroll = $(window).scrollTop();
        if (scroll >= previousScroll+100) {
            $('.navbar').addClass("navbar-hide");
            previousScroll = scroll;

        }else if (scroll+100 < previousScroll) {
            $('.navbar').removeClass("navbar-hide");
            previousScroll = scroll;
        }
    
    });
    
})(jQuery);

For navbar refer to here.

How To Open A Port In CentOS 7 With Firewalld

From: How To Open A Port In CentOS 7 With Firewalld and also here.

And 5 Useful Examples of firewall-cmd command

Open Specific Port

[root@centos7 ~]# firewall-cmd --permanent --add-port=100/tcp
success
[root@centos7 ~]# firewall-cmd --reload
success

We can also open a range of ports in the same way.

[root@centos7 ~]# firewall-cmd --permanent --add-port=200-300/tcp
success

How to add tags to your models in Django

How to add tags to your models in Django | Django Packages Series #1

https://django-taggit.readthedocs.io/en/latest/api.html

Jupiter

Adding basic search to your Django site

From: https://www.calazan.com/adding-basic-search-to-your-django-site/

and How to Add Search Functionality to a Website in Django

# blogs/views.py

import operator

from django.db.models import Q


class BlogSearchListView(BlogListView):
    """
    Display a Blog List page filtered by the search query.
    """
    paginate_by = 10

    def get_queryset(self):
        result = super(BlogSearchListView, self).get_queryset()

        query = self.request.GET.get('q')
        if query:
            query_list = query.split()
            result = result.filter(
                reduce(operator.and_,
                       (Q(title__icontains=q) for q in query_list)) |
                reduce(operator.and_,
                       (Q(content__icontains=q) for q in query_list))
            )

        return result

Bootstrap For Beginners: Navigation Bar - Part Eleven

From: https://www.c-sharpcorner.com/article/bootstrap-for-beginners-navigation-bar-part-eleven2/

How To Deploy Django App with Nginx, Gunicorn, PostgreSQL and Let’s Encrypt SSL on Ubuntu

Django --> Gunicorn (WSGI server) --> Nginx

From here: 

How To Deploy Django App with Nginx, Gunicorn, PostgreSQL and Let’s Encrypt SSL on Ubuntu

and here: 
How To Set Up Django with Postgres, Nginx, and Gunicorn on Ubuntu 18.04