Does DBIx::Class do unions?

Question

I haven't found a way to do unions with DBIx::Class other than using a view and writing out the SQL manually. This seems strange to me. I feel like there should be some way to union two ResultSets without a lot of extra work because set addition and subtraction are such a core part of SQL. Is there an easier way to do unions? If not, why not?

score 13 · Accepted Answer · edited Oct 23 '15 at 11:19

13

DBIx::Class::Helper::ResultSet::SetOperations

my $rs1 = $rs->search({ foo => 'bar' });  
my $rs2 = $rs->search({ baz => 'biff' });  
for ($rs1->union($rs2)->all) { ... }

edited Oct 23 '15 at 11:19

user52889

1,501
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answered Oct 26 '11 at 13:55

aartist

3,145
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score 0 · Answer 2 · answered May 02 '13 at 14:21

As a workaround (without having to load more modules) I did something like this:

$db->resultset("Foo")->search({ -or => [ 
                                        'me.id' => { -in => $result_set_a },
                                        'me.id' => { -in => $result_set_b } 
                                       ]
                              },
                              undef);

Does DBIx::Class do unions?

2 Answers2