Post Extensions

Posts can be extended to attach arbitrary fields to a post instance.

E.g. one want’s to have in a template a field or placeholder related to a post. .. code-block:: python

{{ post.extension.some_field }} {% render_placeholder post.placeholder_extension.some_placeholder %}

Define the models in your .. code-block:: python

from cms.models import CMSPlugin, PlaceholderField

from djangocms_blog.models import Post

class PostExtension(models.Model):
post = models.ForeignKey(Post, on_delete=models.CASCADE, related_name=’extension’) some_field = models.CharField(max_length=10)
class PostPlaceholderExtension(models.Model):
post = models.OneToOneField(Post, on_delete=models.CASCADE, related_name=’placeholder_extension’) some_placeholder = PlaceholderField(‘some_placeholder’)

Define a inline in your .. code-block:: python

from .models import PostExtension

class PostExtensionInline(admin.TabularInline):
model = PostExtension fields = [‘some_field’] classes = [‘collapse’] extra = 1 can_delete = False verbose_name = “PostExtension” verbose_name_plural = “PostExtensions”

Register the extension in djangocms_blog .. code-block:: python

import djangocms_blog.admin as blog_admin blog_admin.register_extension(PostExtensionInline) blog_admin.register_extension(PostPlaceholderExtension)

After this the inline will be available in the Post add and Post change admin forms and a PostPlaceholderExtension instance will be automatically created when a post object is created.