http://cpansearch.perl.org/~jrobinson/DBIx-Class-0.08009/lib/DBIx/Class/Ordered.pm#Unique_Constraints
might be applying to you, and if not, Ordered might help you.
- andreas
On 31. jan.. 2008, at 02.35, Jay Varner wrote:
In short, I'm new to Catalyst and a near intermediate Perl programmer.
I've converted (and vastly improved) my app from CGI::Application to
Catalyst within an amount of time that made me feel like I wasted
those months I spent prior to using Catalyst. However, the past few
days I have been struggling with this one function that I just can't
get.
Honestly, I feel the easiest way for me to explain is to say that this
headache began by me trying to translate this bit of PHP code to
Perl/Catalyst:
http://www.gregphoto.net/index.php/2007/01/16/scriptaculous-sortables-with-ajax-callback/
I'm just stuck. I've tried many things. My current/pressing attempt to
implement this is in a newsletter app where there is a has many
relationship between a Newsletter table and a table for Articles. The
join table has 3 columns – newsletter_id, article_id and ordering. So
I want to use that PHP and Ajax to allow a user to set the order that
articles will appear in a given newsletter. However, some articles
might appear in multiple newsletters. I might be going about this all
wrong and I would love to hear any suggestion of a better way.
For what it is worth, here is my current effort. I don't know if this
is the closest I've gotten, but it's where I'm at right now. This is
not actually my attempt at the the above, it's really just a scaled
back attempt to just figure out the DBIx for it begin sent by a basic
HTML form and not any Ajax shenanigans.
sub reorder : Local {
my ($self, $c ) = @_;
# This just gets the the value for the later redirect to stay on
the same page
my $link = $c-request-params-{link};
# This is from a hidden value in a loop in the template [%
article.id %]
my @articles = $c-request-params-{article_id};
# Value for the newsletter we're working on. Again, this is from a
hidden value
my $newsletter_id = $c-request-params-{newsletter_id};
# This is obviously where I start trying shit to see if I can get
it to work
# The basic goal is to drop in the new value for ordering for each
unique
# article_id and newsletter_id in turn
foreach my $article ( @articles ) {
my $newsletter = $c-model('SASSDB::ArticleNewsletter')-
search(
{
article_id = $article,
newsletter_id =
$newsletter_id
}
);
my @orderings = $c-request-params-{ordering};
foreach my $ordering ( @orderings ) {
$newsletter-update(
{
ordering = $ordering
}
);
}
}
$c-response-redirect($c-uri_for(/admin/newsletters/
picked_articles/$link));
}
This reasonably gives me the following:
DBIx::Class::ResultSet::update(): DBI Exception: DBD::mysql::st
bind_param failed: Illegal parameter number [for Statement UPDATE
articles_newsletters SET ordering = 1 WHERE ( ( ( article_id = ? ) OR
( article_id = ? ) ) AND newsletter_id = ? ) with ParamValues:
1='12', 0='2', 2='18'] at ../lib/SASS/Controller/Admin/Newsletters.pm
line 200
Line 200 is $newsletter-update(
The body_parameters are:
body_parameters = {
_submit = Update,
_submitted_edit_menu = 1,
_submitted_form_create = 1,
article_id = [12, 18],
id = 1,
link = Test,
newsletter_id = 1,
ordering = [1, 2],
},
Let me know if you want to see anything else.
Humbly placing myself on the mercy of the community,
Jay
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