I hope I can explain this well, because I've been wracking my poor
little brain trying to figure out how to do this :)
I'm trying to create a flexible CMS. I want it to be easy for users
to create a Page, and attach all kinds of content ("components") to
that page. These components would all be Model classes. Here are two
simple examples of the components I had in mind:
class TextSnippet(models.Model):
body = models.TextField()
class Photo(models.Model):
image = models.ImageField(upload_to="photos")
The idea is that a user add an arbitrary number of these components to
a Page model. A Page model is nothing more than a container to hold
components, and a URL associated with the Page, something like:
class Page(models.Model):
url = models.CharField( maxlength=100, unique=True,
validator_list=[validators.isAlphaNumericURL])
The problem is that I can't figure out a good way to associate
instances of TextSnippet and Photo with a page. It's obviously a many-
to-many between the components and pages (a component like a photo can
be on many pages, and a page can have many components), but I also
need to store more information about that particular page-component
relationship, for example a IntegerField that specifies the
component's position on that page. Here's what I've come up with so
far:
class PageComponent(models.Model):
page = models.ForeignKey(Page, related_name="components",
edit_inline=models.TABULAR)
content_type = models.ForeignKey(ContentType)
object_id = models.IntegerField(core=True)
position = models.IntegerField(default=0, blank=True)
It "works" not too bad. Conceptually (from the shell), I think it
does what I want. However, I'm having a HECK of a time getting the
Page form in the admin to work in an intuitive way. When adding
components to a page, the user sees a drop-down list of content_types,
and has to enter an object_id. It works for me because I know what to
put for the object_id, but a regular user wouldn't....
I think this would require me to write a custom form class for adding
and editing a page, but with these relationships I really don't even
know where to begin :S
If anyone can provide advice (or just flat out tell me if I'm thinking
about this wrong), it would be much appreciated!
Thanks,
Kyle
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