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class BlogPost(models.Model):
    title = models.CharField(max_length=255)
    body = models.TextField()
    author = models.ForeignKey(User)


 user = User.objects.get(username='victor')

 post = BlogPost(title='Hello world', body='...', author=user)

 post.save()

 my_posts = BlogPost.objects.filter(author=user)

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urlpatterns = [
    path('posts/', views.all_posts),
    path('posts/page/<int:page_number>/', views.posts_page),
    path('posts/<author>/', views.posts_author),
]

def posts_author(request, author):
    posts = BlogPost.objects.filter(author=author)
    return render(request, 'posts/list.html', {'posts': posts})

{% extends 'base.html' %}

{% block content %}

  {% for post in posts %}
    {{ post.title }}

    {% if post.author %}
      {{ author.username }}
    {% else %}
      Anonymous
    {% endif %}
  {% endfor %}

{% endblock %}

<html>
  <head>...</head>
  <body>
    {% block content %}{% endblock %}
  </body>
</html>


 query = "SELECT * FROM users WHERE userId = " + id;

SELECT * FROM users WHERE username = admin OR 1=1;

 SELECT * FROM Users WHERE Name ="" or ""="" AND Pass ="" or ""=""

 {{ comment }}

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