Rails - Mar 2005 - error messages, loops and saves, actionmailer and finaly authentication

Thanks to everyone who responded to my first set of questions.  Not only did I
get my questions answered but I improved my code and learned a couple new
things.

I think I prefer the mailing list over IRC... easier to follow :-)

I have some more questions if you don''t mind.  Some are Rails related
and some
are Ruby related.

1) This is concerning displaying error messages.  I am assuming I should use
error_messages_for "objectName".  So there are a couple questions that
go with
this.

a) If there is no errors being passed to the action then I get an error. How do
I check to see if an error is being passed and if so show error_messages_for?

b) From what I understood while playing around if I use a render_action the
error message will be passed but if I do a redirect_to the errors are not
passed.  How can I use a render_action when the action I want to render if I
get an error is in another controller?

2) This is a continuation from a question from before.  Instead of deleting a
record I mark it as deleted.  If I mark a post as deleted I also want to mark
the comments associated with it as deleted.  I tried the following and it did
not work:

@comments = Comment.find_all "post_id = 1"
@comments.each do |comment|
  comment.deleted = 1
  comment.save
end

It did not work.  Am I doing it the wrong way?

3) After a comment is posted I want to get emailed.  Anyone know of a good
tutorial/anything to help explain to me how to use actionmailer in lamins
terms? :-)

4) Some of the actions I want the user to have to authenticate himself before
he/she can execute them.  Any easy Rails way of doing it?  I was thinking of
just passing a username and password in the URL and verifying it for each
action that needs validation.

Thanks again for all your help guys :-).

Your Friend,

John

> 3) After a comment is posted I want to get emailed.  Anyone know of a  
> good
> tutorial/anything to help explain to me how to use actionmailer in lamins
> terms? :-)
I''m still trying to get this to work myself (so take my recommendation
with a grain of salt) but have a look at

<URL:  
http://wiki.rubyonrails.com/rails/show/HowToSendEmailsWithActionMailer >

-- 
Nathan Wright
http://www.brandalism.com

On 10.3.2005, at 20:41, John Baku wrote:
> Thanks to everyone who responded to my first set of questions.  Not 
> only did I
> get my questions answered but I improved my code and learned a couple 
> new
> things.
>
> I think I prefer the mailing list over IRC... easier to follow :-)
>
> I have some more questions if you don''t mind.  Some are Rails
related
> and some
> are Ruby related.
>
> 1) This is concerning displaying error messages.  I am assuming I 
> should use
> error_messages_for "objectName".  So there are a couple questions
that
> go with
> this.
>
> a) If there is no errors being passed to the action then I get an 
> error. How do
> I check to see if an error is being passed and if so show 
> error_messages_for?
<%= render_errors @object %>
>
> b) From what I understood while playing around if I use a 
> render_action the
> error message will be passed but if I do a redirect_to the errors are 
> not
> passed.  How can I use a render_action when the action I want to 
> render if I
> get an error is in another controller?
There''s a big conceptual difference between render_action and 
redirect_to. The former just selects which template file the action 
will use. It will not jump to another action at all. The latter, 
however, is an external redirect, it causes the browser to jump to a 
totally different url.



>
> 2) This is a continuation from a question from before.  Instead of 
> deleting a
> record I mark it as deleted.  If I mark a post as deleted I also want 
> to mark
> the comments associated with it as deleted.  I tried the following and 
> it did
> not work:
>
> @comments = Comment.find_all "post_id = 1"
A neat trick: @comments = Comment.find_all_by_post_id(1)
> @comments.each do |comment|
>   comment.deleted = 1
>   comment.save
> end
>
> It did not work.  Am I doing it the wrong way?
I don''t see anything that shouldn''t work in your code. Are you
sure
that comment.save returns true (i.e. there is no validation errors)?
>
> 4) Some of the actions I want the user to have to authenticate himself 
> before
> he/she can execute them.  Any easy Rails way of doing it?  I was 
> thinking of
> just passing a username and password in the URL and verifying it for 
> each
> action that needs validation.
Check out login generator and Howto Authenticate 
(http://wiki.rubyonrails.com/rails/show/HowtoAuthenticate).

Howtos are generally a good place to find this kind of tutorials.
>
> Thanks again for all your help guys :-).
You''re welcome ;-)

//jarkko

--
Jarkko Laine
http://jlaine.net
http://odesign.fi


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Thanks for your answers... but does:

render_errors

even exist?  Doesn''t seem to. :-)

Quoting Jarkko Laine <jarkko-k1O+Gnc6WpmsTnJN9+BGXg@public.gmane.org>:
>
> On 10.3.2005, at 20:41, John Baku wrote:
>
> > Thanks to everyone who responded to my first set of questions.  Not
> > only did I
> > get my questions answered but I improved my code and learned a couple
> > new
> > things.
> >
> > I think I prefer the mailing list over IRC... easier to follow :-)
> >
> > I have some more questions if you don''t mind.  Some are Rails
related
> > and some
> > are Ruby related.
> >
> > 1) This is concerning displaying error messages.  I am assuming I
> > should use
> > error_messages_for "objectName".  So there are a couple
questions that
> > go with
> > this.
> >
> > a) If there is no errors being passed to the action then I get an
> > error. How do
> > I check to see if an error is being passed and if so show
> > error_messages_for?
>
> <%= render_errors @object %>
>
> >
> > b) From what I understood while playing around if I use a
> > render_action the
> > error message will be passed but if I do a redirect_to the errors are
> > not
> > passed.  How can I use a render_action when the action I want to
> > render if I
> > get an error is in another controller?
>
> There''s a big conceptual difference between render_action and
> redirect_to. The former just selects which template file the action
> will use. It will not jump to another action at all. The latter,
> however, is an external redirect, it causes the browser to jump to a
> totally different url.
>
>
>
>
> >
> > 2) This is a continuation from a question from before.  Instead of
> > deleting a
> > record I mark it as deleted.  If I mark a post as deleted I also want
> > to mark
> > the comments associated with it as deleted.  I tried the following and
> > it did
> > not work:
> >
> > @comments = Comment.find_all "post_id = 1"
>
> A neat trick: @comments = Comment.find_all_by_post_id(1)
>
> > @comments.each do |comment|
> >   comment.deleted = 1
> >   comment.save
> > end
> >
> > It did not work.  Am I doing it the wrong way?
>
> I don''t see anything that shouldn''t work in your code.
Are you sure
> that comment.save returns true (i.e. there is no validation errors)?
>
> >
> > 4) Some of the actions I want the user to have to authenticate himself
> > before
> > he/she can execute them.  Any easy Rails way of doing it?  I was
> > thinking of
> > just passing a username and password in the URL and verifying it for
> > each
> > action that needs validation.
>
> Check out login generator and Howto Authenticate
> (http://wiki.rubyonrails.com/rails/show/HowtoAuthenticate).
>
> Howtos are generally a good place to find this kind of tutorials.
>
> >
> > Thanks again for all your help guys :-).
>
> You''re welcome ;-)
>
> //jarkko
>
> --
> Jarkko Laine
> http://jlaine.net
> http://odesign.fi
>

On 10.3.2005, at 21:31, John Baku wrote:
> Thanks for your answers... but does:
>
> render_errors
>
> even exist?  Doesn''t seem to. :-)
Oops, it was in the application_helper :-)

   def render_errors(obj)
     return "" unless obj
   	tag = String.new

   	unless obj.errors.empty?
   		tag << %{<ul class="objerrors">}
   		
   		obj.errors.each_full do |message|
   			tag << "<li>#{message}</li>"
   		end
   		
   		tag << "</ul>"
   	end
     tag
   end

//jarkko

>
> Quoting Jarkko Laine
<jarkko-k1O+Gnc6WpmsTnJN9+BGXg@public.gmane.org>:
>
>>
>> On 10.3.2005, at 20:41, John Baku wrote:
>>
>>> Thanks to everyone who responded to my first set of questions.  Not
>>> only did I
>>> get my questions answered but I improved my code and learned a
couple
>>> new
>>> things.
>>>
>>> I think I prefer the mailing list over IRC... easier to follow :-)
>>>
>>> I have some more questions if you don''t mind.  Some are
Rails related
>>> and some
>>> are Ruby related.
>>>
>>> 1) This is concerning displaying error messages.  I am assuming I
>>> should use
>>> error_messages_for "objectName".  So there are a couple
questions
>>> that
>>> go with
>>> this.
>>>
>>> a) If there is no errors being passed to the action then I get an
>>> error. How do
>>> I check to see if an error is being passed and if so show
>>> error_messages_for?
>>
>> <%= render_errors @object %>
>>
>>>
>>> b) From what I understood while playing around if I use a
>>> render_action the
>>> error message will be passed but if I do a redirect_to the errors
are
>>> not
>>> passed.  How can I use a render_action when the action I want to
>>> render if I
>>> get an error is in another controller?
>>
>> There''s a big conceptual difference between render_action and
>> redirect_to. The former just selects which template file the action
>> will use. It will not jump to another action at all. The latter,
>> however, is an external redirect, it causes the browser to jump to a
>> totally different url.
>>
>>
>>
>>
>>>
>>> 2) This is a continuation from a question from before.  Instead of
>>> deleting a
>>> record I mark it as deleted.  If I mark a post as deleted I also
want
>>> to mark
>>> the comments associated with it as deleted.  I tried the following 
>>> and
>>> it did
>>> not work:
>>>
>>> @comments = Comment.find_all "post_id = 1"
>>
>> A neat trick: @comments = Comment.find_all_by_post_id(1)
>>
>>> @comments.each do |comment|
>>>   comment.deleted = 1
>>>   comment.save
>>> end
>>>
>>> It did not work.  Am I doing it the wrong way?
>>
>> I don''t see anything that shouldn''t work in your
code. Are you sure
>> that comment.save returns true (i.e. there is no validation errors)?
>>
>>>
>>> 4) Some of the actions I want the user to have to authenticate 
>>> himself
>>> before
>>> he/she can execute them.  Any easy Rails way of doing it?  I was
>>> thinking of
>>> just passing a username and password in the URL and verifying it
for
>>> each
>>> action that needs validation.
>>
>> Check out login generator and Howto Authenticate
>> (http://wiki.rubyonrails.com/rails/show/HowtoAuthenticate).
>>
>> Howtos are generally a good place to find this kind of tutorials.
>>
>>>
>>> Thanks again for all your help guys :-).
>>
>> You''re welcome ;-)
>>
>> //jarkko
>>
>> --
>> Jarkko Laine
>> http://jlaine.net
>> http://odesign.fi
>>
>
>
> _______________________________________________
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> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
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>
--
Jarkko Laine
http://jlaine.net
http://odesign.fi


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