Rails - Jul 2008 - Final Opinion :: Need final opinions on the best way to handle arrays in forms

Hi There, rails noob just trying to suss a few things out.

So I have 2 tables. 1 called Posts and the other called comments. On
one page I need to be able to edit both the information about the post
and the attributes of each comment for that post. So here is what the
array might look like:

(Inside the params hash)

"post" => [
	{"id"=>28, "title" => "My Title!"}
]

"comments" => [
	{"id" => 1, "title" => "My Comment",
"body" => "My Body"},
	{"id" => 2, "title" => "My Comment",
"body" => "My Body"},
	{"id" => 3, "title" => "My Comment",
"body" => "My Body"}
]

Now, in PHP i would name the fields something like this:

<input type="text" name="comment[0][title]"
value="My Comment" />
<input type="text" name="comment[1][title]"
value="My Comment" />
<input type="text" name="comment[2][title]"
value="My Comment" />

I was able to do this in rails as well using:

text_field "comment[][title]"

... Then I read somewhere else that people were doing something like
this

text_field "comment_1[title]"


and then parsing out the data.

Which one is better? I would tend to think that the array method above
is superior, but then again, I may have no clue what I am talking
about. Is there another method that I am not thinking of?


Thanks!!!!
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> <input type="text" name="comment[0][title]"
value="My Comment" />
>
> text_field "comment_1[title]"
>
No 1 would give you params[:comment]["0"][title]
(I''m 100% not sure, but I think that Rails would make the index a
string in any case,
since it does with most things it gets from the browser)

No 2 would give you params[:comment_1][title]

I like No 1, since it differentiates the name from the index,
but it''s no big difference. So I guess, you can do what gives
you the better looking code.
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I had seen another possible option in railscasts where Ryan Bates uses
fields_for. He would therefore create the form element without an
array in the name and the fields_for tag would be named something like
post[comments][].

Rails would then output form fields with this setup:

post[comments][0][title]

It looks a lot cleaner and I think does the same thing.

On Jul 17, 4:40 am, Thorsten Müller
<thors...-1oxKqHKwyltBDgjK7y7TUQ@public.gmane.org>
wrote:
> > <input type="text" name="comment[0][title]"
value="My Comment" />
>
> > text_field "comment_1[title]"
>
> No 1 would give you params[:comment]["0"][title]
> (I''m 100% not sure, but I think that Rails would make the index a
> string in any case,
> since it does with most things it gets from the browser)
>
> No 2 would give you params[:comment_1][title]
>
> I like No 1, since it differentiates the name from the index,
> but it''s no big difference. So I guess, you can do what gives
> you the better looking code.
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