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auto_now_add can be need default value but, auto_now doesn't need itminor customization, Postmodel itself how to render it in admin.py

when db changed signals can be saidwhen PostModel saved the method, blog_post_model_post_save_receiver executescreate a new model or object which would be used in save method otherwise, it recommends to use in signal

save method is actually changing things. whenever something changed it calls save method*args : how many args**kwargs : how many key-value args slug - remove empty space with '-'

1. how to set up custom validators 2. separate validation file(validators.py) and include that file into the model.pyactually, django has emailfield which means it checks built-in validation

field type says built-in validation for particular field

whatever the class name changed, the title will show 'Post Model'we haven't set method inside model class based methods which means it takes instance itselfevery object is instance reference, smart_text : encoding utf-8that's it for displaying data list understanding how unicode or string data works for instance names

django validate models fields all the time'draft' : field name in db'Draft' : displayed name

1. python manage.py createsuperuser2. admin.pyadmin.site.register(PostModel) 3. how render this model in adminfirst of all, you need to create superuser id then, you can check the content field which is providing the null value but, the title is not allowed null.also, verbose_name is used in meta concept like below.check this out models.py 4. meta

1. char field 2. text field