DBIx to JSON - Wrong format - json

Question

In a Catalyst application, I need to generate JSON from DBIx::Class:Core objects.
Such a class definition looks like this:
use utf8;
package My::Schema::Book;
use strict;
use warnings;
use Moose;
use MooseX::NonMoose;
use MooseX::MarkAsMethods autoclean => 1;
extends 'DBIx::Class::Core';
__PACKAGE__->load_components("InflateColumn::DateTime");
__PACKAGE__->table("books");
__PACKAGE__->add_columns(
"id",
{
data_type => "uuid",
default_value => \"uuid_generate_v4()",
is_nullable => 0,
size => 16,
},
"title"
);
__PACKAGE__->set_primary_key("id");
__PACKAGE__->meta->make_immutable;
sub TO_JSON {
my $self = shift;
{book => {
id => $self->id,
title => $self->title,
}}
}
1;
After queriyng the books from database I do the encoding of the blessed objects:
$c->stash(books_rs => $c->model('My::Schema::Book'));
$c->stash(books => [$c->stash->{books_rs}->search(
{},
{order_by => 'title ASC'})]
);
$c->stash(json => $json->convert_blessed->encode($c->stash->{books}));
$c->forward('View::JSON');
The JSON output of the query is this:
{"json":"[{\"book\":{\"id\":\"ae355346-8e19-46ee-88ee-773ac30938a9\",\"title\":\"TITLE1\"}},{\"book\":{\"id\":\"9a20f526-d4cd-4e7d-a726-55e78bc3c0ac\",\"title\":\"TITLE2\"}},{\"book\":{\"title\":\"TITLE3\",\"id\":\"1ddb2d27-3ec6-46c1-a1a7-0b151fe44597\"}}]"}
The value of the json key and each particular book key got double quotes what can not be parsed by jQuery. It complains about format exception.

Answer 1

$json->convert_blessed->encode($c->stash->{books}) returns a string. It looks like View::JSON also encodes json.
Try to pass your data as is: $c->stash(json => $c->stash->{books});. You may also need to configure expose_stash and json_encoder_args to handle the right keys from your stash and correctly convert your objects.
See
https://metacpan.org/pod/Catalyst::View::JSON#CONFIG-VARIABLES