Honestly I have read this page more than once. Perhaps I've looked at
it too many times and I'm just not seeing it. so in their example I
should be able to make a new join association with the syntax
@article = Article.get(...)
@article.article_category({:article_id => x, :category_id => y })
or.....
On Aug 5, 12:34 pm, Martin Gamsjaeger <[email protected]> wrote:
> Hey,
>
> Have a look at the section about anonymous join models
> at:http://datamapper.org/docs/associations
>
> While the whole page is definitely worth reading, you may want to
> specifically read through
>
> Has, and belongs to, many (Or Many-To-Many)
>
> The naming conventions in use, as well as the way you typically use
> these resources are described over there.
>
> cheers
> snusnu
>
>
>
> On Thu, Aug 5, 2010 at 17:45, Richard Conroy <[email protected]> wrote:
> > On Thu, Aug 5, 2010 at 4:16 PM, deco <[email protected]> wrote:
>
> >> If I made a third model manually and called it cars_people with
> >> person_id and car_id as primary keys I could add rows to it.
> >> (Person.cars_people.new(params) ... I realize his may not be the
> >> correct way, please advise) But seeing as it was done "through
> >> Resource" I don't know how to create them.
>
> > I think you are on the right track. DataMapper supports 2 kinds of join
> > tables,
> > anonymous and custom. For most people anonymous join tables are fine; DM
> > creates the table and references in the background.
>
> >> My models:
>
> >> Cars
> >> property :id, Serial
> >> property :name, String
> >> property :model, String
> >> has n, :people, :through => Resource
>
> >> People
> >> property :id, Serial
> >> property :name, String
> >> property :model, String
> >> has n, :people, :through => Resource
>
> > The key thing here is:
> > has n, :model, :through => Resource
> > This signifies that you are making an anonymous join table. To make this
> > a custom, non anonymous join table, you would need to code it up as a
> > regular
> > model like you are suggesting:
> > CarsPeople
> > belongs_to :people
> > belongs_to :cars
> > property :custom_join_table_property, Stromg
> > Then in your Cars and People models you signify the Custom join table like
> > so:
> > has n, :people, :through => CarsPeople
> > Apologies if this isn't exactly correct, and I have played it fast and loose
> > with DM
> > pluralization naming conventions, but I think you get the picture. The docs
> > aren't
> > exactly swimming with information on how to do this, but the principle is
> > pretty
> > straightforward and consistent.
> > --
> >http://richardconroy.blogspot.com
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "DataMapper" group.
> > To post to this group, send email to [email protected].
> > To unsubscribe from this group, send email to
> > [email protected].
> > For more options, visit this group at
> >http://groups.google.com/group/datamapper?hl=en.
--
You received this message because you are subscribed to the Google Groups
"DataMapper" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/datamapper?hl=en.
