Can someone explain to me how I create a function in ROR, where put it and how I access it? Do I just create another action? What is the correct way to do this? Any help would be appreciated. Jason -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Jason Hhh wrote in post #961994:> Can someone explain to me how I create a function in ROR,By learning Ruby.> where put it > and > how I access it? Do I just create another action? What is the correct > way to do this?That depends on what you''re trying to achieve.> Any help would be appreciated.Help: go learn Ruby.> > JasonBest, -- Marnen Laibow-Koser http://www.marnen.org marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org Sent from my iPhone -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Marnen, That was absolutely no help. Thanks anyways. Jason -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On Tue, Nov 16, 2010 at 8:12 PM, Jason Hhh <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Marnen, > > That was absolutely no help. >Your question is very vague, and there is a lot of information available online... if you google ''ruby function'' you will find this link, which gives an answer as broad as your question: http://www.howtogeek.com/howto/programming/ruby/ruby-function-method-syntax/ Along with other links. If you want more specifics please give them, we are not mind readers (most of us) - i.e. what are you doing.... creating a new controller action? A function in a model? A helper? Did you create a Rails app? Do you have Rails installed? Do you have Ruby installed?> > Thanks anyways. > > Jason > > -- > Posted via http://www.ruby-forum.com/. > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org<rubyonrails-talk%2Bunsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> > . > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
I have a rails app. I understand how to create a function in Rails. I have a contact that is viewable by multiple users. I want to create a function to lock and unlock the contact. I have a field in the contact database called locked. I assume I create a new function in the action controller or contact controller like: def lock(contact_id) c=Contact.find(contact_id) c.locked = 1 c.save end def unlock(contact_id) c=Contact.find(contact_id) c.locked = 0 c.save end Is this the proper way to do this? How do I make sure it''s not accessible through the through the URL: /Contacts/lock? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On Tue, Nov 16, 2010 at 9:48 PM, Jason Hhh <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> I have a rails app. I understand how to create a function in Rails. > > I have a contact that is viewable by multiple users. I want to create a > function to lock and unlock the contact. I have a field in the contact > database called locked. > > I assume I create a new function in the action controller or contact > controller like: > > def lock(contact_id) > c=Contact.find(contact_id) > c.locked = 1 > c.save > end > > def unlock(contact_id) > c=Contact.find(contact_id) > c.locked = 0 > c.save > end > > > Is this the proper way to do this? How do I make sure it''s not > accessible through the through the URL: /Contacts/lock?By keeping the function out of the controller. You may either place lock and unlock in a helper file, or make them as a part of the model itself. I, personally, vote for the latter. Rule of thumb: smart models, thin controller. Happy hacking!> -- > Posted via http://www.ruby-forum.com/. > > -- > You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. > For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en. > >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Thanks Brian! -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Just to hopefully elaborate on things a bit here to help you out Jason
-
In Ruby, since it''s literally a pure Object Oriented language,
generally you''ll see functions referred to instead as
"methods". Same
thing basically, just a nomenclature difference that could make things
easier in the future if you know about it :)
Brian has a good suggestion in terms of design - that kind of
functionality should belong in the model. However, there are some
simpler ways to do things, but it depends largely on how you have your
application set up.
As you''re probably already aware, you can update your contact model
from within your controller like this:
def update
@contact = Contact.find(params[:id])
@contact.update_attributes(params[:contact])
end
This means you can pass in the "locked" flag in your form. However,
depending on how your application is set up, this COULD pose a
security risk. In Rails, there''s a way to protect certain attributes
on a model from being set by a simple form:
class Contact < ActiveRecord::Base
attr_protected :locked
end
The attr_protected method will basically refuse to assign any value to
the attributes it''s protecting if those values come out of a form or a
mass update (see "mass assignment" - Railscasts.com has a screencast
on it, if memory serves).
So the question then becomes, how do you securely update the locked
attribute? One way you could do it would be by adding a controller
action called "lock" and/or "unlock", but instead of
allowing the
controller to do the work, call a new method you create on your
model. Here''s an example:
class ContactsController < ActionController
def index
# ...
end
def show
# ...
end
def lock
@contact = Contact.find(params[:id])
if current_user.contacts.include?(@contact)
@contact.lock
end
end
def unlock
@contact = Contact.find(params[:id])
if current_user.contacts.include?(@contact)
@contact.unlock
end
end
end
class Contact < ActiveRecord::Base
# ... all your current model stuff
def lock
self.update_attribute(:locked, true)
end
def unlock
self.update_attribute(:locked, false)
end
end
To elaborate, the controller basically implements two new "actions" -
lock and unlock. Inside each, it looks for a current_user object
(this assumes your application has some form of authentication set up)
and says, "does current_user''s contacts include the contact object
we
just looked up in the database?" If so, the lock or unlock method is
called on that contact. If not, nothing happens. This effectively
makes sure that your contact is only updated by the user who owns it.
I recognize that this may seem a little like "beating around the bush"
in regards to your original question, so take a look at the lock and
unlock methods that I put in the contact class above. Generally
speaking, Brian''s mentioned rule of thumb, which I''ve always
heard
stated as "skinny controller, fat model", is the way to go. The basic
idea is to push as much functionality down to the model level as
possible, and allow your controllers to be as generic and lean as
possible. This is useful for situations where you may not want to
actually go through the controller - like, for example, using the
Rails console.
Anyway, these two methods just update the locked attribute to be
either true or false. In Ruby, it''s a generally accepted "design
pattern" to create lots of small, short methods to do a few basic
things at a time. It''s not uncommon at all to see lots of methods
that are only a few lines like this, that just set one or more
attributes at a time, possibly performing some form of custom
validation(s) along the way.
Hopefully this example helps you wrap your head around the situation a
little better. Good luck to you!
On Nov 16, 9:41 pm, Jason Hhh
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> Thanks Brian!
>
> --
> Posted viahttp://www.ruby-forum.com/.
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On 17 November 2010 01:24, Jason Hhh <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Can someone explain to me how I create a function in ROROn 17 November 2010 02:48, Jason Hhh <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> I have a rails app. I understand how to create a function in Rails.I''m a little confused as to what you need, as these two posts seem to be contradictory. I agree with the sentiment of Marnen''s post; if you''re confused at this stage about how to structure your code in Ruby (hint, there''s very little difference in general terms with *any* other OO language - differences in idiom, syntax and some functionality, sure - but if you know Java or C#, you should be able to understand a Ruby class easy enough. My point here is that your question possibly seems to be partly about OO programming generally, not Rails specifically) or how to organise the structure of a Rails application, then there are some very good primers out there on the WWW, and several highly recommended books on the subject too. On 17 November 2010 02:48, Jason Hhh <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Is this the proper way to do this? How do I make sure it''s not > accessible through the through the URL: /Contacts/lock?I see you now already have a couple of suggestions, and I''ll add the "private" keyword to the mix as another alternative... they''re all choices, but I would prefer the approach of utilising methods on the model. PS Please try not to top-post your replies, but to interleave them with appropriate quotes, to make following the conversation as easy as possible for readers. Regards -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Thanks Phoenix Rising for the detailed explanation. This is just what I needed. Much appreciated! I am understanding Rails more and more every day. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Jason Hhh wrote:> I have a rails app. I understand how to create a function in Rails. > > I have a contact that is viewable by multiple users. I want to create a > function to lock and unlock the contact. I have a field in the contact > database called locked. > > I assume I create a new function in the action controller or contact > controller like: > > def lock(contact_id) > c=Contact.find(contact_id) > c.locked = 1 > c.save > end > > def unlock(contact_id) > c=Contact.find(contact_id) > c.locked = 0 > c.save > end > > > Is this the proper way to do this? How do I make sure it''s not > accessible through the through the URL: /Contacts/lock? >You can create a ''private'' section in your controller if you have something which belongs in the controller. The stuff in private is accessable from methods in the controller but not through the url. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.