Question

I have a simple perl cgi that i use in my extjs project, written like this :

use JSON;

print "Content-type: application/json\n\n";

my $node_hash = {
data => [{
     "Week",1145,
         "Sev_Logged", "3_major"
},{
    "Week", 1146,
        "Sev_Logged", "4_minor"
}]};
print to_json($node_hash);

Which returns data written in json format that i use to generate a chart.
I also have a form which contains a combobox with values : “3_major” and “4_minor” corresponding to the “Sev_Logged” field.
Now what i want is, whenever the user chooses “4_minor”, my perl cgi will only return week 1146, thus my chart will only contain data of week 1146.

Is this possible? How?
Thank you

Answer 1

I don’t know where your data is coming from, but you can do something like this:

use strict;
use warnings;
use CGI;
use JSON;

my $q = CGI->new;
print $q->header("application/json");

my $Sev_Logged = $q->param('Sev_Logged');

my $data = [
  {
    "Week" => 1145,
    "Sev_Logged" =>"3_major",
  },
  {
    "Week" => 1146,
    "Sev_Logged" => "4_minor",
  },
];

my $node_hash = {
  data => [
    grep { $_->{'Sev_Logged'} eq $Sev_Logged } @$data,
  ]
};
print to_json($node_hash);

You can call it like this: GET script.pl?Sev_Logged=3_major

---

Anyway, I think if you already transmitted all the data, you should filter it on the client side using JavaScript only. There is no AJAX call necessary in my opinion.