On Apr 16, 2010, at 4:17 PM, David Zhu wrote:
thank you sharagoz! But i have a question- is a, b, c supposed to
instance variables? (should i have the @ in front of them, and then
define them in the contrller?) or does rails know what tables I'm
reffering to already?
So flipping the associations around,
d belongs_to c
c belongs_to b
b belongs_to a
Implying that your user model (d) contains a c_id (and only associates
to a single c)
If that's really true, then you don't even let the /show/a request
complete (assuming that you have a login required filter otherwise you
have to check logged_in? or whatever makes current_user valid).
def show
a = A.find_by_id(params[:id])
if current_user.c.b.a != a
redirect_to :action => 'show', :id => current_user.c.b.a
end
end
Of course, you can choose to redirect somewhere else, put an error
page up, or anything else that suits you.
Your question about whether a, b, and c are instance variables reveals
that you need to do some very basic learning about Rails and
ActiveRecord associates in particular.
-Rob
P.S. In fact, there's an alternate way to structure the find against A
that you should discover while you learn Rails. There's a beta
version of the next edition of "Agile Web Development with Rails" from
the Pragmatic Bookshelf.
On Apr 16, 4:13 pm, Sharagoz <[email protected]> wrote:
a == current_user.c.b.a
On Apr 16, 9:06 pm, David Zhu <[email protected]> wrote:
Hello,
i have "a" has many "b", "b" has many "c", and "c" has many "d"
Now... "d" is a user model, and I have a current_user helper method
defined.
If i navigate to an "a" show page, how can I make sure that my
current_user ("d") is part of that "a"? meaning how can i make sure
that current_user belongs to "a"? Because there is the b, and c in
between the "d" and "a", how can I check to see if my current_user
("d") belongs to "a"?
And I being clear? thanks
:)
P.S.
heres an example of what I want if there is only one level of
associations--
---------------------------------------------------------
<% if !current_user == @post.user %>
<p>This post belongs to another user. Please navigate away
immediately.</p>
<% else %>
# The content of edit.html.erb
<% end %>
-----------------------------------------------------------
but that only compares the user, with the model that is up one
level.
(In this case post)
How can i check to see if current_user is part of a higher level?
--
Rob Biedenharn http://agileconsultingllc.com
[email protected]
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