X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fp5-DBIx-Class-ResultSet-RecursiveUpdate;a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FResultSet%2FRecursiveUpdate.pm;h=6626c1c9145b66eb110810baafa722e32314559b;hp=cdfd1ffca61472f2c085eb638bdbcf7328a99b2c;hb=387b70d1f646ae86c8206aa180d3e7b38301e905;hpb=9cf5eeae14f2216a27e18c67a03cefe787dcfc4a diff --git a/lib/DBIx/Class/ResultSet/RecursiveUpdate.pm b/lib/DBIx/Class/ResultSet/RecursiveUpdate.pm index cdfd1ff..6626c1c 100644 --- a/lib/DBIx/Class/ResultSet/RecursiveUpdate.pm +++ b/lib/DBIx/Class/ResultSet/RecursiveUpdate.pm @@ -47,22 +47,27 @@ sub recursive_update { }; $resolved ||= {}; - # warn 'entering: ' . $self->result_source->from(); - carp 'fixed fields needs to be an array ref' + my $source = $self->result_source; + + # warn 'entering: ' . $source->from(); + croak 'fixed fields needs to be an arrayref' if defined $fixed_fields && ref $fixed_fields ne 'ARRAY'; if ( blessed($updates) && $updates->isa('DBIx::Class::Row') ) { return $updates; } - if ( $updates->{id} ) { + if ( exists $updates->{id} ) { + # warn "finding object by id " . $updates->{id} . "\n"; $object = $self->find( $updates->{id}, { key => 'primary' } ); + # warn "object not found by id\n" + # unless defined $object; } my %fixed_fields = map { $_ => 1 } @$fixed_fields if $fixed_fields; my @missing = grep { !exists $updates->{$_} && !exists $fixed_fields{$_} } - $self->result_source->primary_columns; + $source->primary_columns; if ( !$object && !scalar @missing ) { # warn 'finding by: ' . Dumper( $updates ); use Data::Dumper; @@ -73,10 +78,12 @@ sub recursive_update { grep { !exists $resolved->{$_} } @missing; if ( !$object && !scalar @missing ) { - # warn 'finding by +resolved: ' . Dumper( $updates ); use Data::Dumper; + # warn 'finding by +resolved: ' . Dumper( $updates ); use Data::Dumper; $object = $self->find( $updates, { key => 'primary' } ); } - $object ||= $self->new( {} ); + + $object = $self->new( {} ) + unless defined $object; # warn Dumper( $updates ); use Data::Dumper; # direct column accessors @@ -90,14 +97,13 @@ sub recursive_update { # database like has_many, might_have and has_one my %post_updates; my %other_methods; + my %m2m_accessors; my %columns_by_accessor = _get_columns_by_accessor($self); # warn 'resolved: ' . Dumper( $resolved ); # warn 'updates: ' . Dumper( $updates ); use Data::Dumper; # warn 'columns: ' . Dumper( \%columns_by_accessor ); for my $name ( keys %$updates ) { - my $source = $self->result_source; - # columns if ( exists $columns_by_accessor{$name} && !( $source->has_relationship($name) @@ -129,7 +135,7 @@ sub recursive_update { if ( is_m2m( $self, $name ) ) { #warn "$name is a many-to-many helper accessor\n"; - $other_methods{$name} = $updates->{$name}; + $m2m_accessors{$name} = $updates->{$name}; next; } @@ -166,7 +172,7 @@ sub recursive_update { for my $name ( keys %other_methods ) { #warn "update other $name\n"; - $object->$name( $updates->{$name} ); + $object->$name( $other_methods{$name} ); } for my $name ( keys %pre_updates ) { @@ -179,48 +185,46 @@ sub recursive_update { # don't allow insert to recurse to related objects # do the recursion ourselves # $object->{_rel_in_storage} = 1; - #warn "CHANGED: " . $object->is_changed . "\n": + #warn "CHANGED: " . $object->is_changed . "\n"; #warn "IN STOR: " . $object->in_storage . "\n"; $object->update_or_insert if $object->is_changed; $object->discard_changes; # updating many_to_many - for my $name ( keys %$updates ) { - next if exists $columns{$name}; - my $value = $updates->{$name}; - - if ( is_m2m( $self, $name ) ) { - - #warn "update m2m $name\n"; - my ($pk) = _get_pk_for_related( $self, $name ); - my @rows; - my $result_source = $object->$name->result_source; - my @updates; - if ( !defined $value ) { - next; - } - elsif ( ref $value ) { - @updates = @{$value}; + for my $name ( keys %m2m_accessors ) { + my $value = $m2m_accessors{$name}; + + #warn "update m2m $name\n"; + # TODO: only first pk col is used + my ($pk) = _get_pk_for_related( $self, $name ); + my @rows; + my $result_source = $object->$name->result_source; + my @updates; + if ( !defined $value ) { + #next; + @updates = (); + } + elsif ( ref $value ) { + @updates = @{$value}; + } + else { + @updates = ($value); + } + for my $elem (@updates) { + if ( ref $elem ) { + push @rows, $elem; + # recursive_update( + # resultset => $result_source->resultset, + # updates => $elem + # ); } else { - @updates = ($value); - } - for my $elem (@updates) { - if ( ref $elem ) { - push @rows, - recursive_update( - resultset => $result_source->resultset, - updates => $elem - ); - } - else { - push @rows, - $result_source->resultset->find( { $pk => $elem } ); - } + push @rows, + $result_source->resultset->find( { $pk => $elem } ); } - my $set_meth = 'set_' . $name; - $object->$set_meth( \@rows ); } + my $set_meth = 'set_' . $name; + $object->$set_meth( \@rows ); } for my $name ( keys %post_updates ) { @@ -575,6 +579,9 @@ __END__ unknown_params_ok => 1, }); + # You'll get a warning if you pass non-result specific data to + # recursive_update. See L + # for more information how to prevent this. =head1 DESCRIPTION @@ -582,28 +589,27 @@ This is still experimental. You can feed the ->create method of DBIx::Class with a recursive datastructure and have the related records created. Unfortunately you cannot do a similar -thing with update_or_create. -This module tries to fill that void until L has an api itself. +thing with update_or_create. This module tries to fill that void until +L has an api itself. The functional interface can be used without modifications of the model, for example by form processors like L. -It is a base class for Ls providing the method recursive_update -which works just like update_or_create but can recursively update or create -data objects composed of multiple rows. All rows need to be identified by primary keys -- so you need to provide them in the update structure (unless they can be deduced from -the parent row - for example when you have a belongs_to relationship). -If not all columns comprising the primary key are specified a new row will be created, -with the expectation that the missing columns will be filled by it (as in the case of auto_increment -primary keys). +It is a base class for Ls providing the method +recursive_update which works just like update_or_create but can recursively +update or create result objects composed of multiple rows. All rows need to be +identified by primary keys so you need to provide them in the update structure +(unless they can be deduced from the parent row. For example a related row of +a belongs_to relationship). If any of the primary key columns are missing, +a new row will be created, with the expectation that the missing columns will +be filled by it (as in the case of auto_increment primary keys). - -If the resultset itself stores an assignement for the primary key, +If the resultset itself stores an assignment for the primary key, like in the case of: my $restricted_rs = $user_rs->search( { id => 1 } ); -then you need to inform recursive_update about the additional predicate with the fixed_fields attribute: +you need to inform recursive_update about the additional predicate with the fixed_fields attribute: my $user = $restricted_rs->recursive_update( { owned_dvds => [ @@ -619,11 +625,30 @@ then you need to inform recursive_update about the additional predicate with the For a many_to_many (pseudo) relation you can supply a list of primary keys from the other table and it will link the record at hand to those and -only those records identified by them. This is convenient for handling web +only those records identified by them. This is convenient for handling web forms with check boxes (or a select field with multiple choice) that lets you update such (pseudo) relations. -For a description how to set up base classes for ResultSets see L. +For a description how to set up base classes for ResultSets see +L. + +=head2 Additional data in the updates hashref + +If you pass additional data to recursive_update which doesn't match a column +name, column accessor, relationship or many-to-many helper accessor, it will +throw a warning by default. To disable this behaviour you can set the +unknown_params_ok attribute to a true value. + +The warning thrown is: +"No such column, relationship, many-to-many helper accessor or generic accessor '$key'" + +When used by L this can happen if you have +additional form fields that aren't relevant to the database but don't have the +noupdate attribute set to a true value. + +NOTE: in a future version this behaviour will change and throw an exception +instead of a warning! + =head1 DESIGN CHOICES @@ -694,6 +719,67 @@ In this case recursive_update defaults to nullifying the foreign columns. In this case recursive_update deletes the foreign rows. +Updating the relationship: + + Passing ids: + + my $user = $user_rs->recursive_update( { + id => 1, + owned_dvds => [1, 2], + }); + + Passing hashrefs: + + my $user = $user_rs->recursive_update( { + id => 1, + owned_dvds => [ + { + name => 'temp name 1', + }, + { + name => 'temp name 2', + }, + ], + }); + + Passing objects: + + my $user = $user_rs->recursive_update( { + id => 1, + owned_dvds => [ $dvd1, $dvd2 ], + }); + + You can even mix them: + + my $user = $user_rs->recursive_update( { + id => 1, + owned_dvds => [ 1, { id => 2 } ], + }); + +Clearing the relationship: + + my $user = $user_rs->recursive_update( { + id => 1, + owned_dvds => undef, + }); + + This is the same as passing an empty array: + + my $user = $user_rs->recursive_update( { + id => 1, + owned_dvds => [], + }); + +=head2 Treatment of many-to-many pseudo relations + +If a many-to-many accessor key is included in the data structure with a value +of undef or an empty array, all existing related rows are unlinked. + +When the array contains elements they are updated if they exist, created when +not and deleted if not included. + +See L for many-to-many pseudo relationship detection. + Updating the relationship: Passing ids: @@ -721,13 +807,16 @@ Updating the relationship: Passing objects: - TODO + my $dvd = $dvd_rs->recursive_update( { + id => 1, + tags => [ $tag1, $tag2 ], + }); You can even mix them: my $dvd = $dvd_rs->recursive_update( { id => 1, - tags => [ '2', { id => '3' } ], + tags => [ 2, { id => 3 } ], }); Clearing the relationship: @@ -744,20 +833,6 @@ Clearing the relationship: tags => [], }); -=head2 Treatment of many-to-many pseudo relations - -The function gets the information about m2m relations from L. -If it isn't loaded in the ResultSource classes the code relies on the fact that: - - if($object->can($name) and - !$object->result_source->has_relationship($name) and - $object->can( 'set_' . $name ) - ) - -Then $name must be a many to many pseudo relation. -And that in a similarly ugly was I find out what is the ResultSource of -objects from that many to many pseudo relation. - =head1 INTERFACE @@ -769,17 +844,39 @@ The method that does the work here. =head2 is_m2m -$self->is_m2m( 'name ' ) - answers the question if 'name' is a many to many -(pseudo) relation on $self. +=over 4 + +=item Arguments: $name + +=item Return Value: true, if $name is a many to many pseudo-relationship + +=back + +The function gets the information about m2m relations from +L. If it isn't loaded in the ResultSource +class, the code relies on the fact: + + if($object->can($name) and + !$object->result_source->has_relationship($name) and + $object->can( 'set_' . $name ) + ) + +to identify a many to many pseudo relationship. In a similar ugly way the +ResultSource of that many to many pseudo relationship is detected. + +So if you need many to many pseudo relationship support, it's strongly +recommended to load L in your ResultSource +class! =head2 get_m2m_source -$self->get_m2m_source( 'name' ) - returns the ResultSource linked to by the many -to many (pseudo) relation 'name' from $self. +=over 4 +=item Arguments: $name -=head1 DIAGNOSTICS +=item Return Value: $result_source +=back =head1 CONFIGURATION AND ENVIRONMENT @@ -789,6 +886,9 @@ DBIx::Class::RecursiveUpdate requires no configuration files or environment vari DBIx::Class +optional but recommended: + DBIx::Class::IntrospectableM2M + =head1 INCOMPATIBILITIES None reported. @@ -796,7 +896,7 @@ None reported. =head1 BUGS AND LIMITATIONS -No bugs have been reported. +The list of reported bugs can be viewed at L. Please report any bugs or feature requests to C, or through the web interface at