Iterating over bless objects in Perl - perl

I'm working on some code to query F5 load balancers using the BigIP::iControl module.
Right now, I'm getting the following output when doing a Dumper on a variable I get back from a particular function.
I've having a lot of trouble iterating of this object.
How could I go about iterating over this and only taking out the monitor_status for each member?
$VAR1 = [
bless( [
bless( {
'monitor_status' => 'MONITOR_STATUS_UP',
'member' => bless( {
'address' => '127.0.0.0.1',
'port' => '8085'
}, 'Common::IPPortDefinition' )
}, 'LocalLB::PoolMember::MemberMonitorStatus' ),
bless( {
'monitor_status' => 'MONITOR_STATUS_UP',
'member' => bless( {
'address' => '127.0.0.0.1',
'port' => '8085'
}, 'Common::IPPortDefinition' )
}, 'LocalLB::PoolMember::MemberMonitorStatus' ),
bless( {
'monitor_status' => 'MONITOR_STATUS_DOWN',
'member' => bless( {
'address' => '127.0.0.0.1',
'port' => '8085'
}, 'Common::IPPortDefinition' )
}, 'LocalLB::PoolMember::MemberMonitorStatus' ),
bless( {
'monitor_status' => 'MONITOR_STATUS_DOWN',
'member' => bless( {
'address' => '127.0.0.0.1',
'port' => '8085'
}, 'Common::IPPortDefinition' )
}, 'LocalLB::PoolMember::MemberMonitorStatus' )
], 'LocalLB::PoolMember::MemberMonitorStatus[]' )
];

I'm not sure whether those member variables are public - I'm not familiar with the modules used - so this might well violate the encapsulation of the LocalLB::PoolMember::MemberMonitorStatus class. You should check before using.
for my $mms ( #{$VAR1->[0]} ) {
warn $mms->{monitor_status};
}
It would be better to check whether the MemberMonitorStatus class provides an accessor, and possibly an iterator for the member monitor status array.
The above was tested simply by pasting your Dumper output into a Perl script with the code of the for loop implemented based on eyeballing the data structure.
(edit: based on F5 webcentral docs in the Google cache, it may be that MemberMonitorStatus is a simple struct in the underlying code, exposed in the Perl as a class with two member variables - but no behaviour. If so, the above is probably OK.)

Related

Perl DBM::Deep - add/delete in an arrayref of hashrefs

I've been working with DBM::Deep and so far, it's been easy to Read and Update the keys in the DB but when it comes to adding or deleting entities it gets a little complicated and I can't see how it could be done.
I've imported an XML file with XML::Hash and then copied on a DBM::Deep object. So the result is somehow complicated ... The objective of course is to be able to recreate the XML file easily.
So this code:
use DBM::Deep;
use List::Util qw(first);
use Data::Dumper;
my $db = DBM::Deep->new('foo.db');
my $devices = $db->{foo}->{devices}->{device};
(my $match) = grep { $_->{hostname} eq 'myfoo' } #$devices;
print Dumper ($match);
print Dumper($devices);
Gives the following output for the first print:
$VAR1 = bless( {
'enable' => '0',
'hostname' => 'myfoo',
'auth' => 'myauth',
'ip' => 'myip',
'protocol' => 'ssh'
}, 'DBM::Deep::Hash' );
The second print shows:
$VAR1 = bless( [
bless( {
'enable' => '0',
'hostname' => 'myfoo',
'auth' => 'myauth',
'ip' => 'myip',
'protocol' => 'ssh'
}, 'DBM::Deep::Hash' ),
bless( {
'ip' => 'myotherip',
'hostname' => 'myotherfoo',
'auth' => 'myauth',
'protocol' => 'telnet'
}, 'DBM::Deep::Hash' ),
and so on.
Can someone please help me to understand how to Create and Delete in this data structure?

Getting different results from API and 23andme's Raw Data

When I go into 23andme's "Your Raw Data" section on the webpage, I can look up the results for a certain SNP. I used rs6565703. The data returned was:
Genes Marker (SNP) Genomic Position Variants Your Genotype
DOC2B rs6565703 12344 A or C A / C
I understand that in order to get "Your Genotype" you must figure this out by what dosages are returned for each variant. However when I use the same user account, as seen above, the JSON file seems to be returning homozygous A(AA) as seen below.
Just trying to figure out, why these are different?
{
'accession_id' => 'NC_000017.10',
'is_no_call' => bless( do{\(my $o = 0)}, 'JSON::XS::Boolean' ),
'end' => 12344,
'alternate_ids' => [],
'variants' => [
{
'dosage' => '2',
'accession_id' => 'NC_000017.10',
'is_no_call' => $VAR1->[0]{'is_no_call'},
'end' => 12344,
'allele' => 'A',
'platform_labels' => [
'ILMN_CUSTOMv4',
'ILMN_OMNIEXv3_CUSTOMv3'
],
'is_assayed' => bless( do{\(my $o = 1)}, 'JSON::XS::Boolean' ),
'start' => 12343
},
{
'dosage' => '0',
'accession_id' => 'NC_000017.10',
'is_no_call' => $VAR1->[0]{'is_no_call'},
'end' => 12344,
'allele' => 'C',
'platform_labels' => [
'ILMN_CUSTOMv4',
'ILMN_OMNIEXv3_CUSTOMv3'
],
'is_assayed' => $VAR1->[0]{'variants'}[0]{'is_assayed'},
'start' => 12343
}
],
'id' => 'rs6565703',
'is_genotyped' => $VAR1->[0]{'variants'}[0]{'is_assayed'},
'is_assayed' => $VAR1->[0]{'variants'}[0]{'is_assayed'},
'gene_names' => [
'DOC2B'
],
'start' => 12343
}
So i was able to figure this out with some help from 23andme's support team. Turns out the issue was that an account can have multiple profiles. I was using the parent account ID instead of the child profile ID's which is why i was receiving differing results. You can use this endpoint to see if you have multiple profiles within the account.
https://api.23andme.com/3/account/?include=profiles

Accessing data within a Perl variable

I dumped out a Perl variable called $prefs and got this:
$VAR1 = bless( {
'USERID' => 1286,
'PREFS' => {
'1' => {
'VALUE' => 1,
'OTHERS_POST' => 1,
'CLIENTS_POST' => 1,
'ASSIGNED_TASKS' => 1
}
},
'dbh' => bless( {
'_sth' => bless( {}, 'DBI::st' ),
'_dbh' => bless( {}, 'DBI::db' )
}, 'Taskman::DB' )
}, 'USystems::UserPrefs' );
I'm pretty new to Perl, and I was wondering if someone can break down on whether or not it is possible to access specific data within this variable.
Like if I wanted to do an if statement such as
if (OTHERS_POST == 1) {
// code }
How would I get to the actual OTHERS_POST inside the $prefs variable
$prefs->{PREFS}->{1}->{OTHERS_POST};

strange bug accessing a variable in template toolkit

I'm struggling with a bug, that I can't nail down.
I have a function that takes a postcode, does a lookup, and returns a latitude, longitude and area name.
for example, pass it AD300 it returns (something like) 42.6, 1.55, ordino - it works very well.
The function is called like this:
my ($lat, $lng, $area) = $object->release();
The return values are fine, and I can print them in perl with a warn
warn "Area $area, $rellat, $rellng";
This works fine. "Area Ordino, 42.6, 1.55"
I then take one of these values, say $area, add it to a hash of data, and pass it to a web page where it is preprocessed via TT (as I do successfully with a load of other variables).
I'm assigning the value to the hash in the normal way. e.g.
$hash->{'area'} = $area;
Here is where the fun begins. When I try to reference the value in TT e.g. [% hash.area %]
I don't get "Ordino" printed on the web page, I'm told I've passed an Array reference to TT.
After a little debugging, I've found that my hash variable hash.area, is somehow referencing an array (according to TT) holding the three values that I've returned from the subroutine "release". I.e.
hash.area = [42.6, 1.55, ordino] according to TT.
That is, to get the value "Ordino" within the web page, I have to access [% hash.area.2 %].
Further, I can set $hash->{'area'} to equal any of the variables, $lat, $lng, or $area and get the same behavior. TT believes all three variables reference the same array. that is
$lat = $lng = $area = [42.6, 1.55, ordino] according to TT
This is bizare, I can happily print the variables in perl and they appears as normal - not an array. I've tried dumping the hash with dumper, no array, everything is fine. Yet somehow, TT is finding an array. It's doing my head in.
The site is quite large, with a lot of pages and I happily pass variables and hashes via TT to web pages all the time, and have been for 4 years now. I've never seen this. On other pages, I even pass exactly the same output from the "release" method and it is processed correctly.
I don't think my TT processing code is the problem, however the following is relevant.
my $tt = Template->new({
INCLUDE_PATH => [ #$template_directories ],
COMPILE_EXT => '.ttc',
COMPILE_DIR => '/tmp/ttc',
FILTERS => YMGN::View->filters,
PLUGIN_BASE => [ 'YMGN::V::TT::Plugins' ],
EVAL_PERL => 1
});
$self->{tt} = $tt;
$self->{template_directories} = $template_directories;
$self->{output} = $params->{output} || undef;
$self->{data} = $params->{data} || [];
The above creates a new tt object and is part of the "new" function (refed below).
"data" contains the hash. "output" holds the processed template ready to send to users browser. We call new (above), process the data and create the output with the code below.
sub process {
my $self = shift;
my $params = shift;
if (!ref $self || !exists $self->{tt}) {
my $class = $self;
$self = $class->new($params);
}
if (!$self->{output}) {
die "You need to specify output";
}
delete $self->{error};
$self->y->utils->untaint(\$self->{template});
my $rv = $self->{tt}->process(
$self->{template},
$self->{data},
$self->{output},
binmode => ':utf8',
);
if (!$rv) {
warn $self->{tt}->error();
return {
error => $self->{tt}->error(),
};
}
return 0;
}
All of the above is sanitised because there is a lot of other stuff going on.
I believe what's important is that the data going in looks correct, here is a full dump of the complete data that is being processed by tt (at the point of processing). The thing that is causing the problem is bubbles->[*]->{'release'} (note, that release == area in the data. The name was changed for unrelated reasons). As you can see, dumper thinks it's a string. TT deals with everything else fine.
data $VAR1 = {
'system' => {
system stuff
},
'features' => {
site feature config
},
'message_count' => '0',
'bubbles' => [
bless( {
'history' => [
{
'creator' => '73',
'points' => '10',
'screenname' => 'sarah10',
'classname' => 'Flootit::M::Bubbles',
'id' => '1378',
'updated' => '1352050471',
'type' => 'teleport',
'label' => 'teleport',
'class' => 'Flootit::M::Bubbles'
}
],
'creator' => '6',
'release' => 'Escaldes-Engordany',
'image' => 'http://six.flooting.com/files/833/7888.png',
'pop_time' => '1352050644',
'y' => $VAR1->{'y'},
'taken_by' => '0',
'city' => '3',
'title' => 'hey a new bubble',
'id' => '566',
'class' => 'Flootit::M::Bubbles',
'prize' => 'go for it kids'
}, 'Flootit::M::Bubbles' ),
bless( {
'history' => [
{
'creator' => '6',
'points' => '10',
'screenname' => 'sarah20',
'classname' => 'Flootit::M::Bubbles',
'id' => '1723',
'updated' => '1349548017',
'type' => 'teleport',
'label' => 'teleport',
'class' => 'Flootit::M::Bubbles'
},
{
'creator' => '6',
'points' => '5',
'screenname' => 'sarah20',
'classname' => 'Flootit::M::Bubbles',
'id' => '1732',
'updated' => '1349547952',
'type' => 'blow',
'label' => 'blow',
'class' => 'Flootit::M::Bubbles'
}
],
'creator' => '89',
'release' => 'Ordino',
'image' => 'http://six.flooting.com/files/1651/8035.png',
'pop_time' => '1351203843',
'y' => $VAR1->{'y'},
'taken_by' => '0',
'city' => '3',
'title' => 'test4',
'id' => '1780',
'class' => 'Flootit::M::Bubbles',
'prize' => 'asdfasdf dsadsasdfasdfasdf'
}, 'Flootit::M::Bubbles' ),
bless( {
'history' => [],
'creator' => '6',
'release' => 'Andorra la Vella',
'image' => 'http://six.flooting.com/files/1671/8042.png',
'pop_time' => '0',
'y' => $VAR1->{'y'},
'taken_by' => '0',
'city' => '3',
'title' => 'Pretty flowers, tres joli',
'id' => '1797',
'class' => 'Flootit::M::Bubbles',
'prize' => 'With lots of pretty pictures'
}, 'Flootit::M::Bubbles' ),
bless( {
'history' => [],
'creator' => '6',
'release' => 'Hillrise Ward',
'image' => 'http://six.flooting.com/files/1509/8003.png',
'pop_time' => '0',
'y' => $VAR1->{'y'},
'taken_by' => '0',
'city' => '3',
'title' => 'Test beats',
'id' => '1546',
'class' => 'Flootit::M::Bubbles',
'prize' => 'Sound great'
}, 'Flootit::M::Bubbles' )
]
};
What comes out after processing is this (in $output)
There is a
[% FOREACH floot IN bubbles %]
Floating around ARRAY(0xfaf5d448). from [% floot.release %]
if we make this [% floot.release.2 %] it gives the correct value.
All the other fields can be referenced correctly - go figure.
The code that puts "bubbles" together is;
my $bubbles = $y->model('Bubbles')->search(['type' => 'golden', 'image' => '!NULL',
'bubble_prizes' => ['p', { 'p.bubble' => 'self.id'}], ], {
order_by => '(created>CURRENT_DATE() AND thumbsup+thumbsdown<10) DESC, COALESCE(thumbsup,0)-COALESCE(thumbsdown,0) DESC, pop_time DESC',
count => 10,
fields => ['p.title as title', 'p.prize as prize', 'city', 'taken_by', 'pop_time', 'id', 'creator'],
});
for (my $i=0; $i<#$bubbles; $i++) {
# Find specified bubbles (see below for when not found here)
my ($rellat, $rellng, $area) = $bubbles->[$i]->release() ;
$bubbles->[$i]->{'release'} = $area;
}
}
The controller then takes $bubble, bundles it up with session / site data, puts it inside an anonymous hash (as you can see in the data above) and passes it to view for processing.
The code for release is :
sub release {
my $self = shift;
my $postcode = $self->y->model('Prizes')->find({bubble => $self->id})->postcode;
my ( $user_lat, $user_long, $region_name );
if($postcode)
{
( $user_lat, $user_long, $region_name ) = $self->y->api('Location')->from_postcode($postcode);
return ( $user_lat, $user_long, $region_name );
}
}
API::Location is quite large, however the relevant lines are;
$postcode_record = $self->y->model('GeoData')->find( {
source => "ALL_COUNTRIES_POSTCODES",
country => $country_code,
sourceid => $postcode, } );
return ( $postcode_record->latitude, $postcode_record->longitude, $postcode_record->town );
The data dumps I've shown you are taken from inside TT.pm (part of view).
So, any ideas what might be going on or where to start? What can I do to try and debug this further? I'm out of ideas.
Maybe it's because $area is a blessed object; Try this to convert to a scalar string :
$string = ''.$area;
# e.g.
$hash->{'area'} = ''.$area;
Following #Moritz comment, to check that $area is blessed:
print ref($area);
use Data::Dumper; warn Dumper($area);
And q{""} overloaded:
print defined ${ref($area).'::'}{'(""'};
EDIT
sub release can return
- undef if $postcode evaluate to false
- a list but as it is used in as scalar context returns the last argument $region_name like parenthesized list (comma expression)
sub release {
my $self = shift;
my $postcode = $self->y->model('Prizes')->find({bubble => $self->id})->postcode;
my ( $user_lat, $user_long, $region_name );
if($postcode)
{
( $user_lat, $user_long, $region_name ) = $self->y->api('Location')->from_postcode($postcode);
return ( $user_lat, $user_long, $region_name );
}
}
It will be relevant to Dump $region_name or $area, or to look at from_postcode.
I found that the problem went away on other development servers and the production server.
I therefore tried uninstalling and reinstalling TT, however that didn't help.
As it appears it's an environment issue on my dev server, so I am retiring the box and starting a new one.

How do I access values in the data structure returned by XML::Simple?

Hi everyone,
This is very simple for perl programmers but not beginners like me,
I have one xml file and I processed using XML::Simple like this
my $file="service.xml";
my $xml = new XML::Simple;
my $data = $xml->XMLin("$file", ForceArray => ['Service','SystemReaction',
'Customers', 'Suppliers','SW','HW'],);
Dumping out $data, it looks like this:
$data = {
'Service' => [{
'Suppliers' => [{
'SW' => [
{'Path' => '/work/service.xml', 'Service' => 'b7a'},
{'Path' => '/work/service1.xml', 'Service' => 'b7b'},
{'Path' => '/work/service2.xml', 'Service' => 'b5'}]}
],
'Id' => 'SKRM',
'Customers' =>
[{'SW' => [{'Path' => '/work/service.xml', 'Service' => 'ASOC'}]}],
'Des' => 'Control the current through the pipe',
'Name' => ' Control unit'
},
{
'Suppliers' => [{
'HW' => [{
'Type' => 'W',
'Path' => '/work/hardware.xml',
'Nr' => '18',
'Service' => '1'
},
{
'Type' => 'B',
'Path' => '/work/hardware.xml',
'Nr' => '7',
'Service' => '1'
},
{
'Type' => 'k',
'Path' => '/work/hardware.xml',
'Nr' => '1',
'Service' => '1'
}]}
],
'Id' => 'ADTM',
'Customers' =>
[{'SW' => [{'Path' => '/work/service.xml', 'Service' => 'SDCR'}]}],
'Des' => 'It delivers actual motor speed',
'Name' => ' Motor Drivers and Diognostics'
},
# etc.
],
'Systemreaction' => [
# etc.
],
};
How to access each elements in the service and systemReaction(not provided). because I am using "$data" in further processing. So I need to access each Id,customers, suppliers values in each service. How to get particular value from service to do some process with that value.for example I need to get all Id values form service and create nodes for each id values.
To get Type and Nr value I tried like this
foreach my $service (#{ $data->{Service}[1]{Suppliers}[0]{HW}[0] }) {
say $service->{Nr};
}
foreach my $service (#{ $data->{Service}[1]{Suppliers}[0]{HW}[0] }) {
say $service->{Type};
}
can you help me how to get all Nr and Type values from Supplier->HW.
I suggest reading perldocs Reference Tutorial and References and Nested Data Structures. They contain an introduction and full explanation of how to access data like that.
But, for example, you can access the service ID by doing:
say $data->{Service}[0]{Id} # prints SKRM
You could go through all the services, printing their ID, with a loop:
foreach my $service (#{ $data->{Service} }) {
say $service->{Id};
}
In response to your edit
$data->{Service}[1]{Suppliers}[0]{HW}[0] is an hash reference (you can check this quickly by either using Data::Dumper or Data::Dump on it, or just the ref function). In particular, it is { Nr => 18, Path => "/work/hardware.xml", Service => 1, Type => "W" }
In other words, you've almost got it—you just went one level too deep. It should be:
foreach my $service (#{ $data->{Service}[1]{Suppliers}[0]{HW} }) {
say $service->{Nr};
}
Note the lack of the final [0] that you had.