[Django] #32207: Slug field is accepting whitespace when entered through Django shell.

[Django]

#32207: Slug field is accepting whitespace when entered through Django shell.
-------------------------------------+-------------------------------------
               Reporter:             |          Owner:  nobody
  Harshvardhan Anand                 |
                   Type:  Bug        |         Status:  new
              Component:  Database   |        Version:  3.1
  layer (models, ORM)                |       Keywords:  slug; prepopulated;
               Severity:  Normal     |  error reporting; sqlite
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
-------------------------------------+-------------------------------------
 I am using **Django 3.1.3** with **Python 3.7.6**.

 1. Slug field is **accepting whitespaces** when updated from Django shell.
 2. Slug field is **not prepopulated** if data(like title) is entered from
 Django shell.

 But if slug is entered with whitespaces from admin panel then it will
 raise error. And similarly if we create data(e.g. - title) from admin
 panel slug field is prepopulated.

 [https://bit.ly/2Km19CX  I have also created a video(saved in google
 drive) explaining the issue.]

 **In the image below, you can see the slug field with whitespaces -**

 [[Image(https://bit.ly/35FB7Te)]]

 **The model I have defined in models.py is**

 {{{
 class Post(models.Model):
     STATUS_CHOICES = (
         ('draft', 'Draft'),
         ('published', 'Published')
     )

     title = models.CharField(max_length=250)
     slug = models.SlugField(max_length=250, unique_for_date='publish')
     author = models.ForeignKey(User, on_delete=models.CASCADE,
                                 related_name='blog_post')
     body = models.TextField()
     publish = models.DateTimeField(default=timezone.now)
     created = models.DateTimeField(auto_now_add=True)
     updated = models.DateTimeField(auto_now=True)
     status = models.CharField(max_length=10, choices=STATUS_CHOICES,
 default='draft')

     class Meta:
         ordering = ('-publish',)

     def __str__(self):
         return self.title
 }}}


 **Modified admin panel -**

 {{{
 @admin.register(Post)
 class PostAdmin(admin.ModelAdmin):
     list_display = ('title', 'slug', 'author', 'publish', 'status')
     list_filter = ('status', 'created', 'publish', 'author')
     search_fields = ('title', 'body')
     prepopulated_fields = {'slug':('title',)}
     raw_id_fields = ('author',)
     date_hierarchy = 'publish'
     ordering = ('status', 'publish')
 }}}

-- 
Ticket URL: <https://code.djangoproject.com/ticket/32207>
Django <https://code.djangoproject.com/>
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