12. How To Use Slug Field With Django For More Readability?

Django ORM Cookbook

• Introduction

• 1. How to find the query associated with a queryset?
• 2. How to do OR queries in Django ORM?
• 3. How to do AND queries in Django ORM?
• 4. How to do a NOT query in Django queryset?
• 5. How to do union of two querysets from same or different models?
• 6. How to select some fields only in a queryset?
• 7. How to do a subquery expression in Django?
• 8. How to filter a queryset with criteria based on comparing their field values
• 9. How to filter FileField without any file?
• 10. How to perform join operations in django ORM?
• 11. How to find second largest record using Django ORM ?
• 12. Find rows which have duplicate field values
• 13. How to find distinct field values from queryset?
• 14. How to use Q objects for complex queries?
• 15. How to group records in Django ORM?
• 16. How to efficiently select a random object from a model?
• 17. How to use arbitrary database functions in querysets?

• 1. How to create multiple objects in one shot?
• 2. How to copy or clone an existing model object?
• 3. How to ensure that only one object can be created?
• 4. How to update denormalized fields in other models on save?
• 5. How to perform truncate like operation using Django ORM?
• 6. What signals are raised by Django during object creation or update?
• 7. How to convert string to datetime and store in database?

• 1. How to order a queryset in ascending or descending order?
• 2. How to order a queryset in case insensitive manner?
• 3. How to order on two fields
• 4. How to order on a field from a related model (with a foreign key)?
• 5. How to order on an annotated field?

• 1. How to model one to one relationships?
• 2. How to model one to many relationships?
• 3. How to model many to many relationships?
• 4. How to include a self-referencing ForeignKey in a model
• 5. How to convert existing databases to Django models?
• 6. How to add a model for a database view?
• 7. How to create a generic model which can be related to any kind of entity? (Eg. a Category or a Comment?)
• 8. How to specify the table name for a model?
• 9. How to specify the column name for model field?
• 10. What is the difference between null=True and blank=True?
• 11. How to use a UUID instead of ID as primary key?
• 12. How to use slug field with django for more readability?
• 13. How to add multiple databases to the django application ?

• 1. How to assert that a function used a fixed number of queries?
• 2. How to speed tests by reusing database between test runs?
• 3. How to reload a model object from the database?

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• 12. How to use slug field with django for more readability?
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12. How to use slug field with django for more readability?¶

Slug is a part of a URL which identifies a particular page on a website in a form readable by users. For making it work django offers us a slugfield. It can be implimented as under. We already had a model Article we will be adding slugfield to it to make it user readable.

from django.utils.text import slugify class Article(models.Model): headline = models.CharField(max_length=100) . . . slug = models.SlugField(unique=True) def save(self, *args, **kwargs): self.slug = slugify(self.headline) super(Article, self).save(*args, **kwargs) . . . >>> u1 = User.objects.get(id=1) >>> from datetime import date >>> a1 = Article.objects.create(headline="todays market report", pub_date=date(2018, 3, 6), reporter=u1) >>> a1.save() // slug here is auto-generated, we haven't created it in the above create method. >>> a1.slug 'todays-market-report' Slug is useful because: it’s human friendly (eg. /blog/ instead of /1/). it’s good SEO to create consistency in title, heading and URL.