On 11/19/2010 8:51 PM, Micah Carrick wrote:
> I'm having trouble coming up with a pretty solution to a seemingly
> simple task. I'm relatively new to Django.
>
> I want to allow the end user to control various lists of links on the
> site used for navigation. The admin should allow the creation of "link
> groups" which have a collection of "links". These links would reference
> a pre-determined list of models. Let's say, for example, that there is a
> "link group" created for the footer links of a website. In the admin
> section, a user could add a link to a specific blog (from the Blog
> model), another link to the about us page (flatpages), etc.
>
> In other words, I'm trying to associate individual records from a number
> of tables together as a group of objects having a URL. I'm trying to
> find a nice, abstract solution. Obviously I don't want actual URLs in
> the database. This is something I would use frequently so I want to see
> if I can find or write an app to do this--if I can come up with an
> elegant solution.
>
> This would be nice, but, I can't imagine how it could be possible:
>
>
> class LinkGroup(models.Model):
> site = models.ForeignKey(Site)
> name = models.CharField()
>
> class Links(models.Model):
> link_group = ForeignKey(LinkGroup)
> model_type = ???
> model_id = ForeignKey(<to the PK of the above the model_type>) # no
> can do!
> sort_order = PositiveIntegerField(default=100)
>
>
> This is an idea, however, I don't like having to reference the import in
> the DB. It's just begging for problems.
>
>
> class LinkModel(models.Model):
> name = models.CharField() # such as "Flat Page"
> model = models.CharField() # such as "myapp.models.FlatPage"
>
> class LinkGroup(models.Model):
> site = models.ForeignKey(Site)
> name = models.CharField() # such as "Navigation Links"
>
> class Link(models.Model):
> text = CharField() # such as "About Us"
> link_group = ForeignKey(LinkGroup)
> model = ForeignKey(LinkModel)
> model_id = PositiveIntegerField() # such as the PK for the
> myapp.models.FlatPage model
> sort_order = PositiveIntegerField(default=100)
>
>
> Any suggestions?
>
What's wrong with the first approach? I use a similar technique to put
pages in sections at http://holdenweb.com/ - here are the relevant models:
class Section(models.Model):
secid = models.IntegerField(primary_key=True) # This field type is
corrected
sectitle = models.CharField(max_length=50)
secpath = models.CharField(max_length=50)
secbgcolor = models.CharField(max_length=50)
secstcolor = models.CharField(max_length=50)
secpos = models.CharField(max_length=1)
secsequence = models.IntegerField() # This field type is corrected
sechandler = models.CharField(max_length=50)
sechomeslot = models.IntegerField() # This field type is corrected
sechometitle = models.CharField(max_length=50)
secnews = models.CharField(max_length=20, null=True)
class Meta:
db_table = 'section'
unique_together = (('secpath', ), ('sectitle', ))
class Admin:
list_display = ('sectitle', )
def __str__(self):
return self.sectitle
class Page(models.Model):
pagpath = models.CharField(primary_key=True, max_length=50)
pagdoctitle = models.CharField(max_length=250)
pagtitle = models.CharField(max_length=200, blank=True, null=True)
pagsecid = models.ForeignKey(Section, blank=True, null=True,
db_column='pagsecid') # This field
type is corrected
pagsequence = models.IntegerField() # This field type is corrected
pagtplname = models.CharField(max_length=50)
paggenerated = models.SmallIntegerField()
paglinkpath = models.CharField(max_length=50, blank=True, null=True)
pagcontent = models.TextField()
pagnavbarstuff = models.TextField(null=True, blank=True)
pagctype = models.CharField(max_length=1, default="R") # This field
type is corrected
pagid = models.IntegerField() # Note this should eventually become
the PK
pagnews = models.CharField(max_length=20, blank=True, null=True)
class Meta:
db_table = 'page'
def __str__(self):
return self.pagpath
What is it that the first model didn't do for you?
regards
Steve
--
DjangoCon US 2010 September 7-9 http://djangocon.us/
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