+sub get_mini_journal {
+ my ($self) = @_;
+
+ # inventory ids of the most recent 10 inventory trans_ids
+
+ # duplicate code copied from SL::Controller::Inventory mini_journal, except
+ # for the added filter on parts_id
+
+ my $parts_id = $self->id;
+ my $query = <<"SQL";
+with last_inventories as (
+ select id,
+ trans_id,
+ itime
+ from inventory
+ where parts_id = $parts_id
+ order by itime desc
+ limit 20
+),
+grouped_ids as (
+ select trans_id,
+ array_agg(id) as ids
+ from last_inventories
+ group by trans_id
+ order by max(itime)
+ desc limit 10
+)
+select unnest(ids)
+ from grouped_ids
+ limit 20 -- so the planner knows how many ids to expect, the cte is an optimisation fence
+SQL
+
+ my $objs = SL::DB::Manager::Inventory->get_all(
+ query => [ id => [ \"$query" ] ], # make emacs happy "
+ with_objects => [ 'parts', 'trans_type', 'bin', 'bin.warehouse' ], # prevent lazy loading in template
+ sort_by => 'itime DESC',
+ );
+ # remember order of trans_ids from query, for ordering hash later
+ my @sorted_trans_ids = uniq map { $_->trans_id } @$objs;
+
+ # at most 2 of them belong to a transaction and the qty determines in or out.
+ my %transactions;
+ for (@$objs) {
+ $transactions{ $_->trans_id }{ $_->qty > 0 ? 'in' : 'out' } = $_;
+ $transactions{ $_->trans_id }{base} = $_;
+ }
+
+ # because the inventory transactions were built in a hash, we need to sort the
+ # hash by using the original sort order of the trans_ids
+ my @sorted = map { $transactions{$_} } @sorted_trans_ids;
+
+ return \@sorted;
+}
+