__PACKAGE__->load_components(qw/AccessorGroup/);
__PACKAGE__->mk_group_accessors('simple' =>
- qw/_ordered_columns _columns _primaries name resultset_class result_class schema from _relationships/);
+ qw/_ordered_columns _columns _primaries _unique_constraints name resultset_class result_class schema from _relationships/);
=head1 NAME
my ($self, @cols) = @_;
$self->_ordered_columns( \@cols )
if !$self->_ordered_columns;
- push @{ $self->_ordered_columns }, @cols;
+ my @added;
+ my $columns = $self->_columns;
while (my $col = shift @cols) {
- my $column_info = ref $cols[0] ? shift : {};
+ my $column_info = ref $cols[0] ? shift(@cols) : {};
# If next entry is { ... } use that for the column info, if not
# use an empty hashref
- $self->_columns->{$col} = $column_info;
+ push(@added, $col) unless exists $columns->{$col};
+
+ $columns->{$col} = $column_info;
}
+ push @{ $self->_ordered_columns }, @added;
+ return $self;
}
*add_column = \&add_columns;
return $self->resultset_class->new($self);
}
-=head2 has_column
-
+=head2 has_column
+
if ($obj->has_column($col)) { ... }
Returns 1 if the source has a column of this name, 0 otherwise.
sub column_info {
my ($self, $column) = @_;
croak "No such column $column" unless exists $self->_columns->{$column};
+ if ( (! $self->_columns->{$column}->{data_type})
+ && $self->schema && $self->storage() ){
+ my $info;
+############ eval for the case of storage without table
+ eval{
+ $info = $self->storage->columns_info_for ( $self->from() );
+ };
+ if ( ! $@ ){
+ for my $col ( keys %{$self->_columns} ){
+ for my $i ( keys %{$info->{$col}} ){
+ $self->_columns()->{$col}->{$i} = $info->{$col}->{$i};
+ }
+ }
+ }
+ }
return $self->_columns->{$column};
}
=head2 columns
- my @column_names = $obj->columns;
-
-=cut
-
-sub columns {
- croak "columns() is a read-only accessor, did you mean add_columns()?" if (@_ > 1);
- return keys %{shift->_columns};
-}
-
-=head2 ordered_columns
-
- my @column_names = $obj->ordered_columns;
+ my @column_names = $obj->columns;
-Like columns(), but returns column names using the order in which they were
-originally supplied to add_columns().
+Returns all column names in the order they were declared to add_columns
=cut
-sub ordered_columns {
+sub columns {
+ croak "columns() is a read-only accessor, did you mean add_columns()?" if (@_ > 1);
return @{shift->{_ordered_columns}||[]};
}
-=head2 set_primary_key(@cols)
-
+=head2 set_primary_key(@cols)
+
Defines one or more columns as primary key for this source. Should be
called after C<add_columns>.
-
-=cut
+
+Additionally, defines a unique constraint named C<primary>.
+
+=cut
sub set_primary_key {
my ($self, @cols) = @_;
unless $self->has_column($_);
}
$self->_primaries(\@cols);
+
+ $self->add_unique_constraint(primary => \@cols);
}
-=head2 primary_columns
-
+=head2 primary_columns
+
Read-only accessor which returns the list of primary keys.
-
-=cut
+
+=cut
sub primary_columns {
return @{shift->_primaries||[]};
}
+=head2 add_unique_constraint
+
+Declare a unique constraint on this source. Call once for each unique
+constraint.
+
+ # For e.g. UNIQUE (column1, column2)
+ __PACKAGE__->add_unique_constraint(constraint_name => [ qw/column1 column2/ ]);
+
+=cut
+
+sub add_unique_constraint {
+ my ($self, $name, $cols) = @_;
+
+ for (@$cols) {
+ $self->throw("No such column $_ on table ".$self->name)
+ unless $self->has_column($_);
+ }
+
+ my %unique_constraints = $self->unique_constraints;
+ $unique_constraints{$name} = $cols;
+ $self->_unique_constraints(\%unique_constraints);
+}
+
+=head2 unique_constraints
+
+Read-only accessor which returns the list of unique constraints on this source.
+
+=cut
+
+sub unique_constraints {
+ return %{shift->_unique_constraints||{}};
+}
+
=head2 from
Returns an expression of the source to be supplied to storage to specify
sub add_relationship {
my ($self, $rel, $f_source_name, $cond, $attrs) = @_;
- die "Can't create relationship without join condition" unless $cond;
+ croak "Can't create relationship without join condition" unless $cond;
$attrs ||= {};
my %rels = %{ $self->_relationships };
attrs => $attrs };
$self->_relationships(\%rels);
- return 1;
+ return $self;
+
+ # XXX disabled. doesn't work properly currently. skip in tests.
my $f_source = $self->schema->source($f_source_name);
unless ($f_source) {
if ($@) { # If the resolve failed, back out and re-throw the error
delete $rels{$rel}; #
$self->_relationships(\%rels);
- die "Error creating relationship $rel: $@";
+ croak "Error creating relationship $rel: $@";
}
1;
}
return $self->_relationships->{$rel};
}
+=head2 has_relationship($rel)
+
+Returns 1 if the source has a relationship of this name, 0 otherwise.
+
+=cut
+
+sub has_relationship {
+ my ($self, $rel) = @_;
+ return exists $self->_relationships->{$rel};
+}
+
=head2 resolve_join($relation)
Returns the join structure required for the related result source
$self->related_source($_)->resolve_join($join->{$_}, $_) }
keys %$join;
} elsif (ref $join) {
- die("No idea how to resolve join reftype ".ref $join);
+ croak ("No idea how to resolve join reftype ".ref $join);
+ } else {
+ my $rel_info = $self->relationship_info($join);
+ croak("No such relationship ${join}") unless $rel_info;
+ my $type = $rel_info->{attrs}{join_type} || '';
+ return [ { $join => $self->related_source($join)->from,
+ -join_type => $type },
+ $self->resolve_condition($rel_info->{cond}, $join, $alias) ];
+ }
+}
+
+=head2 resolve_condition($cond, $rel, $alias|$object)
+
+Resolves the passed condition to a concrete query fragment. If given an alias,
+returns a join condition; if given an object, inverts that object to produce
+a related conditional from that object.
+
+=cut
+
+sub resolve_condition {
+ my ($self, $cond, $rel, $for) = @_;
+ #warn %$cond;
+ if (ref $cond eq 'HASH') {
+ my %ret;
+ while (my ($k, $v) = each %{$cond}) {
+ # XXX should probably check these are valid columns
+ $k =~ s/^foreign\.// || croak "Invalid rel cond key ${k}";
+ $v =~ s/^self\.// || croak "Invalid rel cond val ${v}";
+ if (ref $for) { # Object
+ #warn "$self $k $for $v";
+ $ret{$k} = $for->get_column($v);
+ #warn %ret;
+ } else {
+ $ret{"${rel}.${k}"} = "${for}.${v}";
+ }
+ }
+ return \%ret;
+ } elsif (ref $cond eq 'ARRAY') {
+ return [ map { $self->resolve_condition($_, $rel, $for) } @$cond ];
} else {
- my $rel_obj = $self->relationship_info($join);
- #use Data::Dumper; warn Dumper($class->result_source) unless $rel_obj;
- die("No such relationship ${join}") unless $rel_obj;
- my $j_class = $self->related_source($join)->result_class;
- my %join = (_action => 'join',
- _aliases => { 'self' => $alias, 'foreign' => $join },
- _classes => { $alias => $self->result_class, $join => $j_class });
- my $j_cond = $j_class->resolve_condition($rel_obj->{cond}, \%join);
- return [ { $join => $j_class->_table_name,
- -join_type => $rel_obj->{attrs}{join_type} || '' }, $j_cond ];
+ die("Can't handle this yet :(");
}
}
+
=head2 related_source($relname)
Returns the result source for the given relationship
projects / dbsrgits/DBIx-Class-Historic.git / blobdiff