web: replace 'errormsg' with 'errormsg IS NULL' in most cases

This is implement in an extremely hacky way due to poor DBIx feature
support. Ideally, what we'd need is a way to tell DBIx to ignore the
errormsg column unless explicitly requested, and to automatically add a
computed 'errormsg IS NULL' column in others. Since it does not support
that, this commit instead hacks some support via method overrides while
taking care to not break anything obvious.

package.nix

@@ -87,6 +87,7 @@ let
         DateTime
         DBDPg
         DBDSQLite
+        DBIxClassHelpers
         DigestSHA1
         EmailMIME
         EmailSender

src/lib/Hydra/Controller/Jobset.pm

@@ -371,6 +371,12 @@ sub errors_GET {
 
     $c->stash->{template} = 'eval-error.tt';
 
+    my $jobsetName = $c->stash->{params}->{name};
+    $c->stash->{jobset} = $c->stash->{project}->jobsets->find(
+        { name => $jobsetName },
+        { '+columns' => { 'errormsg' => 'errormsg' } }
+    );
+
     $self->status_ok($c, entity => $c->stash->{jobset});
 }
 

src/lib/Hydra/Controller/JobsetEval.pm

@@ -93,6 +93,8 @@ sub errors_GET {
 
     $c->stash->{template} = 'eval-error.tt';
 
+    $c->stash->{eval} = $c->model('DB::JobsetEvals')->find($c->stash->{eval}->id, { prefetch => 'evaluationerror' });
+
     $self->status_ok($c, entity => $c->stash->{eval});
 }
 

src/lib/Hydra/Helper/Nix.pm

@@ -286,8 +286,7 @@ sub getEvals {
 
     my @evals = $evals_result_set->search(
         { hasnewbuilds => 1 },
-        { order_by => "$me.id DESC", rows => $rows, offset => $offset
-        , prefetch => { evaluationerror => [ ] } });
+        { order_by => "$me.id DESC", rows => $rows, offset => $offset });
     my @res = ();
     my $cache = {};
 

src/lib/Hydra/Schema/Result/EvaluationErrors.pm

@@ -105,4 +105,6 @@ __PACKAGE__->add_column(
     "+id" => { retrieve_on_insert => 1 }
 );
 
+__PACKAGE__->mk_group_accessors('column' => 'has_error');
+
 1;

src/lib/Hydra/Schema/Result/Jobsets.pm

@@ -386,6 +386,8 @@ __PACKAGE__->add_column(
     "+id" => { retrieve_on_insert => 1 }
 );
 
+__PACKAGE__->mk_group_accessors('column' => 'has_error');
+
 sub supportsDynamicRunCommand {
   my ($self) = @_;
 

src/lib/Hydra/Schema/ResultSet/EvaluationErrors.pm

@@ -0,0 +1,30 @@
+package Hydra::Schema::ResultSet::EvaluationErrors;
+
+use strict;
+use utf8;
+use warnings;
+
+use parent 'DBIx::Class::ResultSet';
+
+use Storable qw(dclone);
+
+__PACKAGE__->load_components('Helper::ResultSet::RemoveColumns');
+
+# Exclude expensive error message values unless explicitly requested, and
+# replace them with a summary field describing their presence/absence.
+sub search_rs {
+  my ( $class, $query, $attrs ) = @_;
+
+  if ($attrs) {
+    $attrs = dclone($attrs);
+  }
+
+  unless (exists $attrs->{'select'} || exists $attrs->{'columns'}) {
+    $attrs->{'+columns'}->{'has_error'} = "errormsg != ''";
+  }
+  unless (exists $attrs->{'+columns'}->{'errormsg'}) {
+    push @{ $attrs->{'remove_columns'} }, 'errormsg';
+  }
+
+  return $class->next::method($query, $attrs);
+}

src/lib/Hydra/Schema/ResultSet/Jobsets.pm

@@ -0,0 +1,30 @@
+package Hydra::Schema::ResultSet::Jobsets;
+
+use strict;
+use utf8;
+use warnings;
+
+use parent 'DBIx::Class::ResultSet';
+
+use Storable qw(dclone);
+
+__PACKAGE__->load_components('Helper::ResultSet::RemoveColumns');
+
+# Exclude expensive error message values unless explicitly requested, and
+# replace them with a summary field describing their presence/absence.
+sub search_rs {
+  my ( $class, $query, $attrs ) = @_;
+
+  if ($attrs) {
+    $attrs = dclone($attrs);
+  }
+
+  unless (exists $attrs->{'select'} || exists $attrs->{'columns'}) {
+    $attrs->{'+columns'}->{'has_error'} = "errormsg != ''";
+  }
+  unless (exists $attrs->{'+columns'}->{'errormsg'}) {
+    push @{ $attrs->{'remove_columns'} }, 'errormsg';
+  }
+
+  return $class->next::method($query, $attrs);
+}

src/root/common.tt

@@ -513,7 +513,7 @@ BLOCK renderEvals %]
             ELSE %]
              -
             [% END %]
-            [% IF eval.evaluationerror.errormsg %]
+            [% IF eval.evaluationerror.has_error %]
               <span class="badge badge-warning">Eval Errors</span>
             [% END %]
           </td>
@@ -639,7 +639,7 @@ BLOCK renderJobsetOverview %]
         <td>[% HTML.escape(j.description) %]</td>
         <td>[% IF j.lastcheckedtime;
                  INCLUDE renderDateTime timestamp = j.lastcheckedtime;
-                 IF j.errormsg || j.fetcherrormsg; %]&nbsp;<span class = 'badge badge-warning'>Error</span>[% END;
+                 IF j.has_error || j.fetcherrormsg; %]&nbsp;<span class = 'badge badge-warning'>Error</span>[% END;
                  ELSE; "-";
                END %]</td>
         [% IF j.get_column('nrtotal') > 0 %]

src/root/jobset-eval.tt

@@ -90,7 +90,7 @@ c.uri_for(c.controller('JobsetEval').action_for('view'),
   [% END %]
   <li class="nav-item"><a class="nav-link" href="#tabs-inputs" data-toggle="tab">Inputs</a></li>
 
-  [% IF eval.evaluationerror.errormsg %]
+  [% IF eval.evaluationerror.has_error %]
     <li class="nav-item"><a class="nav-link" href="#tabs-errors" data-toggle="tab"><span class="text-warning">Evaluation Errors</span></a></li>
   [% END %]
 </ul>
@@ -165,7 +165,7 @@ c.uri_for(c.controller('JobsetEval').action_for('view'),
     [% END %]
   </div>
 
-  [% IF eval.evaluationerror.errormsg %]
+  [% IF eval.evaluationerror.has_error %]
     <div id="tabs-errors" class="tab-pane">
       <iframe src="[% c.uri_for(c.controller('JobsetEval').action_for('errors'), [eval.id], params) %]" loading="lazy" frameBorder="0" width="100%"></iframe>
     </div>

src/root/jobset.tt

@@ -61,7 +61,7 @@
   [% END %]
 
   <li class="nav-item"><a class="nav-link active" href="#tabs-evaluations" data-toggle="tab">Evaluations</a></li>
-  [% IF jobset.errormsg || jobset.fetcherrormsg %]
+  [% IF jobset.has_error || jobset.fetcherrormsg %]
     <li class="nav-item"><a class="nav-link" href="#tabs-errors" data-toggle="tab"><span class="text-warning">Evaluation Errors</span></a></li>
   [% END %]
   <li class="nav-item"><a class="nav-link" href="#tabs-jobs" data-toggle="tab">Jobs</a></li>
@@ -79,7 +79,7 @@
         <th>Last checked:</th>
         <td>
           [% IF jobset.lastcheckedtime %]
-            [% INCLUDE renderDateTime timestamp = jobset.lastcheckedtime %], [% IF jobset.errormsg || jobset.fetcherrormsg %]<em class="text-warning">with errors!</em>[% ELSE %]<em>no errors</em>[% END %]
+            [% INCLUDE renderDateTime timestamp = jobset.lastcheckedtime %], [% IF jobset.has_error || jobset.fetcherrormsg %]<em class="text-warning">with errors!</em>[% ELSE %]<em>no errors</em>[% END %]
           [% ELSE %]
             <em>never</em>
           [% END %]
@@ -117,7 +117,7 @@
 
   </div>
 
-  [% IF jobset.errormsg || jobset.fetcherrormsg %]
+  [% IF jobset.has_error || jobset.fetcherrormsg %]
     <div id="tabs-errors" class="tab-pane">
       <iframe src="[% c.uri_for('/jobset' project.name jobset.name "errors") %]" loading="lazy" frameBorder="0" width="100%"></iframe>
     </div>

t/evaluator/evaluate-constituents-broken.t

@@ -22,7 +22,7 @@ like(
     "The stderr record includes a relevant error message"
 );
 
-$jobset->discard_changes;  # refresh from DB
+$jobset->discard_changes({ '+columns' => {'errormsg' => 'errormsg'} });  # refresh from DB
 like(
     $jobset->errormsg,
     qr/aggregate job ‘mixed_aggregate’ failed with the error: constituentA: does not exist/,

t/lib/CliRunners.pm

@@ -14,7 +14,7 @@ our @EXPORT = qw(
 sub evalSucceeds {
     my ($jobset) = @_;
     my ($res, $stdout, $stderr) = captureStdoutStderr(60, ("hydra-eval-jobset", $jobset->project->name, $jobset->name));
-    $jobset->discard_changes;  # refresh from DB
+    $jobset->discard_changes({ '+columns' => {'errormsg' => 'errormsg'} });  # refresh from DB
     if ($res) {
         chomp $stdout; chomp $stderr;
         utf8::decode($stdout) or die "Invalid unicode in stdout.";
@@ -29,7 +29,7 @@ sub evalSucceeds {
 sub evalFails {
     my ($jobset) = @_;
     my ($res, $stdout, $stderr) = captureStdoutStderr(60, ("hydra-eval-jobset", $jobset->project->name, $jobset->name));
-    $jobset->discard_changes;  # refresh from DB
+    $jobset->discard_changes({ '+columns' => {'errormsg' => 'errormsg'} });  # refresh from DB
     if (!$res) {
         chomp $stdout; chomp $stderr;
         utf8::decode($stdout) or die "Invalid unicode in stdout.";

t/queue-runner/direct-indirect-constituents.t

@@ -13,7 +13,7 @@ my $constituentBuildA = $builds->{"constituentA"};
 my $constituentBuildB = $builds->{"constituentB"};
 
 my $eval = $constituentBuildA->jobsetevals->first();
-is($eval->evaluationerror->errormsg, "");
+is($eval->evaluationerror->has_error, 0);
 
 subtest "Verifying the direct aggregate" => sub {
     my $aggBuild = $builds->{"direct_aggregate"};