use Carp::Clan qw/^DBIx::Class/;
use Scalar::Util 'weaken';
use Lingua::EN::Inflect::Phrase ();
+use Lingua::EN::Tagger ();
use DBIx::Class::Schema::Loader::Utils 'split_name';
use File::Slurp 'slurp';
use Try::Tiny;
=head2 generate_code
-Arguments: local_moniker (scalar), fk_info (arrayref)
+Arguments:
+
+ {
+ local_moniker (scalar) => [ fk_info (arrayref), uniq_info (arrayref) ]
+ ...
+ }
-This generates the code for the relationships of a given table.
+This generates the code for the relationships of each table.
C<local_moniker> is the moniker name of the table which had the REFERENCES
statements. The fk_info arrayref's contents should take the form:
# ...
],
+The uniq_info arrayref's contents should take the form:
+
+ [
+ [
+ uniq_constraint_name => [ 'col1', 'col2' ],
+ ],
+ [
+ another_uniq_constraint_name => [ 'col1', 'col2' ],
+ ],
+ ],
+
This method will return the generated relationships as a hashref keyed on the
class names. The values are arrayrefs of hashes containing method name and
arguments, like so:
relationship_attrs
rel_collision_map
_temp_classes
+ __tagger
/);
sub new {
return $relname if $relname eq 'id'; # this shouldn't happen, but just in case
- if ($self->base->_is_result_class_method($relname)) {
+ my $table = $self->base->tables->{$moniker};
+
+ if ($self->base->_is_result_class_method($relname, $table)) {
if (my $map = $self->rel_collision_map) {
for my $re (keys %$map) {
if (my @matches = $relname =~ /$re/) {
}
my $new_relname = $relname;
- while ($self->base->_is_result_class_method($new_relname)) {
+ while ($self->base->_is_result_class_method($new_relname, $table)) {
$new_relname .= '_rel'
}
}
sub generate_code {
- my ($self, $local_moniker, $rels, $uniqs) = @_;
+ my ($self, $tables) = @_;
+
+ # make a copy to destroy
+ my @tables = @$tables;
my $all_code = {};
- my $local_class = $self->schema->class($local_moniker);
+ while (my ($local_moniker, $rels, $uniqs) = @{ shift @tables || [] }) {
+ my $local_class = $self->schema->class($local_moniker);
- my %counters;
- foreach my $rel (@$rels) {
- next if !$rel->{remote_source};
- $counters{$rel->{remote_source}}++;
- }
+ my %counters;
+ foreach my $rel (@$rels) {
+ next if !$rel->{remote_source};
+ $counters{$rel->{remote_source}}++;
+ }
- foreach my $rel (@$rels) {
- my $remote_moniker = $rel->{remote_source}
- or next;
+ foreach my $rel (@$rels) {
+ my $remote_moniker = $rel->{remote_source}
+ or next;
- my $remote_class = $self->schema->class($remote_moniker);
- my $remote_obj = $self->schema->source($remote_moniker);
- my $remote_cols = $rel->{remote_columns} || [ $remote_obj->primary_columns ];
+ my $remote_class = $self->schema->class($remote_moniker);
+ my $remote_obj = $self->schema->source($remote_moniker);
+ my $remote_cols = $rel->{remote_columns} || [ $remote_obj->primary_columns ];
- my $local_cols = $rel->{local_columns};
+ my $local_cols = $rel->{local_columns};
- if($#$local_cols != $#$remote_cols) {
- croak "Column count mismatch: $local_moniker (@$local_cols) "
- . "$remote_moniker (@$remote_cols)";
- }
+ if($#$local_cols != $#$remote_cols) {
+ croak "Column count mismatch: $local_moniker (@$local_cols) "
+ . "$remote_moniker (@$remote_cols)";
+ }
- my %cond;
- foreach my $i (0 .. $#$local_cols) {
- $cond{$remote_cols->[$i]} = $local_cols->[$i];
+ my %cond;
+ foreach my $i (0 .. $#$local_cols) {
+ $cond{$remote_cols->[$i]} = $local_cols->[$i];
+ }
+
+ my ( $local_relname, $remote_relname, $remote_method ) =
+ $self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters );
+
+ $remote_relname = $self->_resolve_relname_collision($local_moniker, $local_cols, $remote_relname);
+ $local_relname = $self->_resolve_relname_collision($remote_moniker, $remote_cols, $local_relname);
+
+ push(@{$all_code->{$local_class}},
+ { method => 'belongs_to',
+ args => [ $remote_relname,
+ $remote_class,
+ \%cond,
+ $self->_remote_attrs($local_moniker, $local_cols),
+ ],
+ extra => {
+ moniker => $local_moniker,
+ },
+ }
+ );
+
+ my %rev_cond = reverse %cond;
+ for (keys %rev_cond) {
+ $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_};
+ delete $rev_cond{$_};
+ }
+
+ push(@{$all_code->{$remote_class}},
+ { method => $remote_method,
+ args => [ $local_relname,
+ $local_class,
+ \%rev_cond,
+ $self->_relationship_attrs($remote_method),
+ ],
+ extra => {
+ moniker => $remote_moniker,
+ },
+ }
+ );
}
+ }
+
+ # disambiguate rels with the same name
+ foreach my $class (keys %$all_code) {
+ my $dups = $self->_duplicates($all_code->{$class});
- my ( $local_relname, $remote_relname, $remote_method ) =
- $self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters );
+ $self->_disambiguate($all_code->{$class}, $dups) if $dups;
+ }
+
+ $self->_cleanup;
+
+ return $all_code;
+}
+
+sub _duplicates {
+ my ($self, $rels) = @_;
+
+ my @rels = map [ $_->{args}[0] => $_ ], @$rels;
+ my %rel_names;
+ $rel_names{$_}++ foreach map $_->[0], @rels;
+
+ my @dups = grep $rel_names{$_} > 1, keys %rel_names;
+
+ my %dups;
+
+ foreach my $dup (@dups) {
+ $dups{$dup} = [ map $_->[1], grep { $_->[0] eq $dup } @rels ];
+ }
+
+ return if not %dups;
+
+ return \%dups;
+}
+
+sub _tagger {
+ my $self = shift;
+
+ $self->__tagger(Lingua::EN::Tagger->new) unless $self->__tagger;
+
+ return $self->__tagger;
+}
- $remote_relname = $self->_resolve_relname_collision($local_moniker, $local_cols, $remote_relname);
- $local_relname = $self->_resolve_relname_collision($remote_moniker, $remote_cols, $local_relname);
+sub _adjectives {
+ my ($self, @cols) = @_;
- push(@{$all_code->{$local_class}},
- { method => 'belongs_to',
- args => [ $remote_relname,
- $remote_class,
- \%cond,
- $self->_remote_attrs($local_moniker, $local_cols),
- ],
+ my @adjectives;
+
+ foreach my $col (@cols) {
+ my @words = split_name $col;
+
+ my $tagged = $self->_tagger->get_readable(join ' ', @words);
+
+ push @adjectives, $tagged =~ m{\G(\w+)/JJ\s+}g;
+ }
+
+ return @adjectives;
+}
+
+sub _disambiguate {
+ my ($self, $all_rels, $dups) = @_;
+
+ foreach my $dup (keys %$dups) {
+ my @rels = @{ $dups->{$dup} };
+
+ foreach my $rel (@rels) {
+ next if $rel->{method} eq 'belongs_to';
+
+ my @to_cols = apply { s/^foreign\.//i }
+ keys %{ $rel->{args}[2] };
+
+ my @adjectives = $self->_adjectives(@to_cols);
+
+ # If there are no adjectives, and there is only one might_have
+ # rel to that class, we hardcode 'active'.
+
+ my $to_class = $rel->{args}[1];
+
+ if ((not @adjectives)
+ && (grep { $_->{method} eq 'might_have'
+ && $_->{args}[1] eq $to_class } @$all_rels) == 1) {
+
+ @adjectives = 'active';
}
- );
- my %rev_cond = reverse %cond;
- for (keys %rev_cond) {
- $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_};
- delete $rev_cond{$_};
- }
+ if (@adjectives) {
+ my $rel_name = join '_', sort(@adjectives), $rel->{args}[0];
+
+ $rel_name = $rel->{method} eq 'might_have' ?
+ $self->_inflect_singular($rel_name)
+ :
+ $self->_inflect_plural($rel_name);
+
+ my $moniker = $rel->{extra}{moniker};
+
+ my @from_cols = apply { s/^self\.//i }
+ values %{ $rel->{args}[2] };
- push(@{$all_code->{$remote_class}},
- { method => $remote_method,
- args => [ $local_relname,
- $local_class,
- \%rev_cond,
- $self->_relationship_attrs($remote_method),
- ],
+ $rel_name = $self->_resolve_relname_collision($moniker, \@from_cols, $rel_name);
+
+ $rel->{args}[0] = $rel_name;
}
- );
+ }
}
- return $all_code;
+ # Check again for duplicates, since the heuristics above may not have resolved them all.
+
+ if ($dups = $self->_duplicates($all_rels)) {
+ foreach my $dup (keys %$dups) {
+ # sort by method
+ my @rels = map $_->[1], sort { $a->[0] <=> $b->[0] } map [
+ ($_->{method} eq 'belongs_to' ? 3 : $_->{method} eq 'has_many' ? 2 : 1), $_
+ ], @{ $dups->{$dup} };
+
+ my $rel_num = 2;
+
+ foreach my $rel (@rels[1 .. $#rels]) {
+ my $inflect_type = $rel->{method} eq 'has_many' ?
+ 'inflect_plural'
+ :
+ 'inflect_singular';
+
+ my $inflect_method = "_$inflect_type";
+
+ my $relname_new_uninflected =
+ $self->_inflect_singular($rel->{args}[0]) . "_$rel_num";
+
+ $rel_num++;
+
+ my $relname_new = $self->$inflect_method($relname_new_uninflected);
+
+ my $moniker = $rel->{extra}{moniker};
+
+ my @from_cols = apply { s/^self\.//i }
+ values %{ $rel->{args}[2] };
+
+ warn <<"EOF";
+Could not find a proper name for relationship '$relname_new' in source '$moniker' for columns '@{[ join ',', @from_cols ]}'.
+Supply a value in '$inflect_type' for '$relname_new_uninflected' to name this relationship.
+EOF
+
+ $rel->{args}[0] = $relname_new;
+ }
+ }
+ }
}
sub _relnames_and_method {
return ( $local_relname, $remote_relname, $remote_method );
}
-sub cleanup {
+sub _cleanup {
my $self = shift;
for my $class (@{ $self->_temp_classes }) {
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