From: Peter Rabbitson Date: Tue, 29 Jul 2014 00:12:33 +0000 (+0200) Subject: Deprecate _build_unique_cond, move its guts to ::ResultSource where it belongs X-Git-Tag: v0.082800~99 X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=d681f1bb;p=dbsrgits%2FDBIx-Class.git Deprecate _build_unique_cond, move its guts to ::ResultSource where it belongs --- diff --git a/lib/DBIx/Class/ResultSet.pm b/lib/DBIx/Class/ResultSet.pm index 7f21daf..d9d8959 100644 --- a/lib/DBIx/Class/ResultSet.pm +++ b/lib/DBIx/Class/ResultSet.pm @@ -821,7 +821,6 @@ sub find { . "corresponding to the columns of the specified unique constraint '$constraint_name'" ) unless @c_cols == @_; - $call_cond = {}; @{$call_cond}{@c_cols} = @_; } @@ -848,17 +847,15 @@ sub find { } } - # add-in the resultset condition if any - ($call_cond) = $self->_merge_with_rscond($call_cond); - my $alias = exists $attrs->{alias} ? $attrs->{alias} : $self->{attrs}{alias}; my $final_cond; if (defined $constraint_name) { $final_cond = $self->_qualify_cond_columns ( - $self->_build_unique_cond ( - $constraint_name, - $call_cond, + $self->result_source->_minimal_valueset_satisfying_constraint( + constraint_name => $constraint_name, + values => ($self->_merge_with_rscond($call_cond))[0], + carp_on_nulls => 1, ), $alias, @@ -873,17 +870,28 @@ sub find { # relationship } else { + my (@unique_queries, %seen_column_combinations); + # no key was specified - fall down to heuristics mode: # run through all unique queries registered on the resultset, and # 'OR' all qualifying queries together - my (@unique_queries, %seen_column_combinations); - for my $c_name ($rsrc->unique_constraint_names) { + # + # always start from 'primary' if it exists at all + for my $c_name ( sort { + $a eq 'primary' ? -1 + : $b eq 'primary' ? 1 + : $a cmp $b + } $rsrc->unique_constraint_names) { + next if $seen_column_combinations{ join "\x00", sort $rsrc->unique_constraint_columns($c_name) }++; push @unique_queries, try { - $self->_build_unique_cond ($c_name, $call_cond, 'croak_on_nulls') + $self->result_source->_minimal_valueset_satisfying_constraint( + constraint_name => $c_name, + values => ($self->_merge_with_rscond($call_cond))[0], + ), } || (); } @@ -942,44 +950,20 @@ sub _qualify_cond_columns { } sub _build_unique_cond { - my ($self, $constraint_name, $final_cond, $croak_on_null) = @_; - - my @c_cols = $self->result_source->unique_constraint_columns($constraint_name); - - # trim out everything not in $columns - $final_cond = { map { - exists $final_cond->{$_} - ? ( $_ => $final_cond->{$_} ) - : () - } @c_cols }; - - if (my @missing = grep - { ! ($croak_on_null ? defined $final_cond->{$_} : exists $final_cond->{$_}) } - (@c_cols) - ) { - $self->throw_exception( sprintf ( "Unable to satisfy requested constraint '%s', no values for column(s): %s", - $constraint_name, - join (', ', map { "'$_'" } @missing), - ) ); - } - - if ( - !$croak_on_null - and - !$ENV{DBIC_NULLABLE_KEY_NOWARN} - and - my @undefs = sort grep { ! defined $final_cond->{$_} } (keys %$final_cond) - ) { - carp_unique ( sprintf ( - "NULL/undef values supplied for requested unique constraint '%s' (NULL " - . 'values in column(s): %s). This is almost certainly not what you wanted, ' - . 'though you can set DBIC_NULLABLE_KEY_NOWARN to disable this warning.', - $constraint_name, - join (', ', map { "'$_'" } @undefs), - )); - } - - return $final_cond; + carp_unique sprintf + '_build_unique_cond is a private method, and moreover is about to go ' + . 'away. Please contact the development team at %s if you believe you ' + . 'have a genuine use for this method, in order to discuss alternatives.', + DBIx::Class::_ENV_::HELP_URL, + ; + + my ($self, $constraint_name, $cond, $croak_on_null) = @_; + + $self->result_source->_minimal_valueset_satisfying_constraint( + constraint_name => $constraint_name, + values => $cond, + carp_on_nulls => !$croak_on_null + ); } =head2 search_related diff --git a/lib/DBIx/Class/ResultSource.pm b/lib/DBIx/Class/ResultSource.pm index c5feb09..47fa905 100644 --- a/lib/DBIx/Class/ResultSource.pm +++ b/lib/DBIx/Class/ResultSource.pm @@ -1552,6 +1552,53 @@ sub _identifying_column_set { return undef; } +sub _minimal_valueset_satisfying_constraint { + my $self = shift; + my $args = { ref $_[0] eq 'HASH' ? %{ $_[0] } : @_ }; + + my $vals = $self->storage->_extract_fixed_condition_columns( + $args->{values}, + ($args->{carp_on_nulls} ? 'consider_nulls' : undef ), + ); + + my $cols; + for my $col ($self->unique_constraint_columns($args->{constraint_name}) ) { + if( ! exists $vals->{$col} ) { + $cols->{missing}{$col} = 1; + } + elsif( ! defined $vals->{$col} ) { + $cols->{$args->{carp_on_nulls} ? 'undefined' : 'missing'}{$col} = 1; + } + else { + $cols->{present}{$col} = 1; + } + } + + $self->throw_exception( sprintf ( "Unable to satisfy requested constraint '%s', missing values for column(s): %s", + $args->{constraint_name}, + join (', ', map { "'$_'" } sort keys %{$cols->{missing}} ), + ) ) if $cols->{missing}; + + if ( + $cols->{undefined} + and + !$ENV{DBIC_NULLABLE_KEY_NOWARN} + ) { + carp_unique ( sprintf ( + "NULL/undef values supplied for requested unique constraint '%s' (NULL " + . 'values in column(s): %s). This is almost certainly not what you wanted, ' + . 'though you can set DBIC_NULLABLE_KEY_NOWARN to disable this warning.', + $args->{constraint_name}, + join (', ', map { "'$_'" } sort keys %{$cols->{undefined}}), + )); + } + + return { map + { $_ => $vals->{$_} } + ( keys %{$cols->{present}}, keys %{$cols->{undefined}} ) + }; +} + # Returns the {from} structure used to express JOIN conditions sub _resolve_join { my ($self, $join, $alias, $seen, $jpath, $parent_force_left) = @_; diff --git a/t/61findnot.t b/t/61findnot.t index b8b0d31..89070ce 100644 --- a/t/61findnot.t +++ b/t/61findnot.t @@ -47,8 +47,10 @@ ok(@cd && !defined($cd[0]), 'Array contains an undef as only element'); $cd = $schema->resultset("CD")->first; my $artist_rs = $schema->resultset("Artist")->search({ artistid => $cd->artist->artistid }); -$art = $artist_rs->find({ name => 'some other name' }, { key => 'primary' }); -ok($art, 'Artist found by key in the resultset'); +for my $key ('', 'primary') { + my $art = $artist_rs->find({ name => 'some other name' }, { $key ? (key => $key) : () }); + is($art->artistid, $cd->get_column('artist'), "Artist found through @{[ $key ? 'explicit' : 'implicit' ]} key locked in the resultset"); +} # collapsing and non-collapsing are separate codepaths, thus the separate tests