X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FTable.pm;h=e1bbe7d0d00688111b25fd39192901ba8e0c912b;hb=958bcea5fcf02c0c13e934dd03103d8421dcc144;hp=630125988f72ea70d6b10eec9de7075cbe0c5d03;hpb=55e2d745a1887534cbcbfe351278d0883dce8ac5;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/DBIx/Class/Table.pm b/lib/DBIx/Class/Table.pm index 6301259..e1bbe7d 100644 --- a/lib/DBIx/Class/Table.pm +++ b/lib/DBIx/Class/Table.pm @@ -4,8 +4,9 @@ use strict; use warnings; use DBIx::Class::ResultSet; +use Data::Page; -use base qw/Class::Data::Inheritable/; +use base qw/DBIx::Class/; __PACKAGE__->mk_classdata('_columns' => {}); @@ -25,203 +26,13 @@ DBIx::Class::Table - Basic table methods =head1 DESCRIPTION -This class is responsible for defining and doing basic operations on -L objects. +This class is responsible for defining and doing table-level operations on +L classes. =head1 METHODS -=over 4 - -=item new - - my $obj = My::Class->new($attrs); - -Creates a new object from column => value mappings passed as a hash ref - -=cut - -sub new { - my ($class, $attrs) = @_; - $class = ref $class if ref $class; - my $new = bless({ _column_data => { } }, $class); - if ($attrs) { - $new->throw("attrs must be a hashref" ) unless ref($attrs) eq 'HASH'; - while (my ($k, $v) = each %{$attrs}) { - $new->store_column($k => $v); - } - } - return $new; -} - -=item insert - - $obj->insert; - -Inserts an object into the database if it isn't already in there. Returns -the object itself. - -=cut - -sub insert { - my ($self) = @_; - return $self if $self->in_storage; - #use Data::Dumper; warn Dumper($self); - my %in; - $in{$_} = $self->get_column($_) - for grep { defined $self->get_column($_) } $self->columns; - my %out = %{ $self->storage->insert($self->_table_name, \%in) }; - $self->store_column($_, $out{$_}) - for grep { $self->get_column($_) ne $out{$_} } keys %out; - $self->in_storage(1); - $self->{_dirty_columns} = {}; - return $self; -} - -=item in_storage - - $obj->in_storage; # Get value - $obj->in_storage(1); # Set value - -Indicated whether the object exists as a row in the database or not - -=cut - -sub in_storage { - my ($self, $val) = @_; - $self->{_in_storage} = $val if @_ > 1; - return $self->{_in_storage}; -} - -=item create - - my $new = My::Class->create($attrs); - -A shortcut for My::Class->new($attrs)->insert; - -=cut - -sub create { - my ($class, $attrs) = @_; - $class->throw( "create needs a hashref" ) unless ref $attrs eq 'HASH'; - return $class->new($attrs)->insert; -} - -=item update - - $obj->update; - -Must be run on an object that is already in the database; issues an SQL -UPDATE query to commit any changes to the object to the db if required. - =cut -sub update { - my ($self, $upd) = @_; - $self->throw( "Not in database" ) unless $self->in_storage; - my %to_update = %{$upd || {}}; - $to_update{$_} = $self->get_column($_) for $self->is_changed; - return -1 unless keys %to_update; - my $rows = $self->storage->update($self->_table_name, \%to_update, - $self->ident_condition); - if ($rows == 0) { - $self->throw( "Can't update ${self}: row not found" ); - } elsif ($rows > 1) { - $self->throw("Can't update ${self}: updated more than one row"); - } - $self->{_dirty_columns} = {}; - return $self; -} - -sub ident_condition { - my ($self) = @_; - my %cond; - $cond{$_} = $self->get_column($_) for keys %{$self->_primaries}; - return \%cond; -} - -=item delete - - $obj->delete - -Deletes the object from the database. The object is still perfectly usable -accessor-wise etc. but ->in_storage will now return 0 and the object must -be re ->insert'ed before it can be ->update'ed - -=cut - -sub delete { - my $self = shift; - if (ref $self) { - $self->throw( "Not in database" ) unless $self->in_storage; - #warn $self->_ident_cond.' '.join(', ', $self->_ident_values); - $self->storage->delete($self->_table_name, $self->ident_condition); - $self->in_storage(undef); - #$self->store_column($_ => undef) for $self->primary_columns; - # Should probably also arrange to trash PK if auto - # but if we do, post-delete cascade triggers fail :/ - } else { - my $attrs = { }; - if (@_ > 1 && ref $_[$#_] eq 'HASH') { - $attrs = { %{ pop(@_) } }; - } - my $query = (ref $_[0] eq 'HASH' ? $_[0] : {@_}); - $self->storage->delete($self->_table_name, $query); - } - return $self; -} - -=item get_column - - my $val = $obj->get_column($col); - -Fetches a column value - -=cut - -sub get_column { - my ($self, $column) = @_; - $self->throw( "Can't fetch data as class method" ) unless ref $self; - $self->throw( "No such column '${column}'" ) unless $self->_columns->{$column}; - return $self->{_column_data}{$column} - if exists $self->{_column_data}{$column}; - return undef; -} - -=item set_column - - $obj->set_column($col => $val); - -Sets a column value; if the new value is different to the old the column -is marked as dirty for when you next call $obj->update - -=cut - -sub set_column { - my $self = shift; - my ($column) = @_; - my $old = $self->get_column($column); - my $ret = $self->store_column(@_); - $self->{_dirty_columns}{$column} = 1 unless defined $old && $old eq $ret; - return $ret; -} - -=item store_column - - $obj->store_column($col => $val); - -Sets a column value without marking it as dirty - -=cut - -sub store_column { - my ($self, $column, $value) = @_; - $self->throw( "No such column '${column}'" ) - unless $self->_columns->{$column}; - $self->throw( "set_column called for ${column} without value" ) - if @_ < 3; - return $self->{_column_data}{$column} = $value; -} - sub _register_columns { my ($class, @cols) = @_; my $names = { %{$class->_columns} }; @@ -234,11 +45,11 @@ sub _mk_column_accessors { $class->mk_group_accessors('column' => @cols); } -=item add_columns +=head2 add_columns __PACKAGE__->add_columns(qw/col1 col2 col3/); -Adds columns to the current package, and creates accessors for them +Adds columns to the current class and creates accessors for them. =cut @@ -248,7 +59,7 @@ sub add_columns { $class->_mk_column_accessors(@cols); } -=item search_literal +=head2 search_literal my @obj = $class->search_literal($literal_where_cond, @bind); my $cursor = $class->search_literal($literal_where_cond, @bind); @@ -263,21 +74,18 @@ sub search_literal { return $class->search(\$cond, $attrs); } -=item count_literal +=head2 count_literal my $count = $class->count_literal($literal_where_cond); =cut sub count_literal { - my ($class, $cond, @vals) = @_; - $cond =~ s/^\s*WHERE//i; - my $attrs = (ref $vals[$#vals] eq 'HASH' ? pop(@vals) : {}); - $attrs->{bind} = [ @vals ]; - return $class->count($cond, $attrs); + my $class = shift; + return $class->search_literal(@_)->count; } -=item count +=head2 count my $count = $class->count({ foo => 3 }); @@ -285,37 +93,23 @@ sub count_literal { sub count { my $class = shift; - my $attrs = { }; - if (@_ > 1 && ref $_[$#_] eq 'HASH') { - $attrs = { %{ pop(@_) } }; - } - my $query = (@_ == 1 || ref $_[0] eq "HASH" ? shift: {@_}); - my @cols = 'COUNT(*)'; - my $cursor = $class->storage->select($class->_table_name, \@cols, - $query, $attrs); - return ($cursor->next)[0]; + return $class->search(@_)->count; } -sub cursor_to_resultset { - my ($class, $sth, $args, $cols, $attrs) = @_; - my $rs_class = $class->_resultset_class; - eval "use $rs_class;"; - my $rs = $rs_class->new($class, $sth, $args, $cols, $attrs); - return (wantarray ? $rs->all : $rs); -} +=head2 search -sub _row_to_object { # WARNING: Destructive to @$row - my ($class, $cols, $row) = @_; - my $new = $class->new; - $new->store_column($_, shift @$row) for @$cols; - $new->in_storage(1); - return $new; -} + my @obj = $class->search({ foo => 3 }); # "... WHERE foo = 3" + my $cursor = $class->search({ foo => 3 }); -=item search +To retrieve all rows, simply call C with no condition parameter, - my @obj = $class->search({ foo => 3 }); - my $cursor = $class->search({ foo => 3 }); + my @all = $class->search(); # equivalent to search({}) + +If you need to pass in additional attributes (see +L for details) an empty hash indicates +no condition, + + my @all = $class->search({}, { cols => [qw/foo bar/] }); # "SELECT foo, bar FROM $class_table" =cut @@ -326,13 +120,22 @@ sub search { if (@_ > 1 && ref $_[$#_] eq 'HASH') { $attrs = { %{ pop(@_) } }; } - my $query = (@_ == 1 || ref $_[0] eq "HASH" ? shift: {@_}); - my @cols = $class->_select_columns; - return $class->cursor_to_resultset(undef, $attrs->{bind}, \@cols, - { where => $query, %$attrs }); + $attrs->{where} = (@_ == 1 || ref $_[0] eq "HASH" ? shift: {@_}); + + my $rs = $class->resultset($attrs); + + return (wantarray ? $rs->all : $rs); } -=item search_like +sub resultset { + my $class = shift; + + my $rs_class = $class->_resultset_class; + eval "use $rs_class;"; + my $rs = $rs_class->new($class, @_); +} + +=head2 search_like Identical to search except defaults to 'LIKE' instead of '=' in condition @@ -353,22 +156,11 @@ sub _select_columns { return keys %{$_[0]->_columns}; } -=item copy - - my $copy = $orig->copy({ change => $to, ... }); - -=cut - -sub copy { - my ($self, $changes) = @_; - my $new = bless({ _column_data => { %{$self->{_column_data}}} }, ref $self); - $new->set_column($_ => $changes->{$_}) for keys %$changes; - return $new->insert; -} - -=item table +=head2 table __PACKAGE__->table('tbl_name'); + +Gets or sets the table name. =cut @@ -376,54 +168,65 @@ sub table { shift->_table_name(@_); } -=item find_or_create +=head2 find_or_create $class->find_or_create({ key => $val, ... }); Searches for a record matching the search condition; if it doesn't find one, -creates one and returns that instead +creates one and returns that instead. =cut sub find_or_create { my $class = shift; my $hash = ref $_[0] eq "HASH" ? shift: {@_}; - my ($exists) = $class->search($hash); + my $exists = $class->find($hash); return defined($exists) ? $exists : $class->create($hash); } -=item insert_or_update - - $obj->insert_or_update - -Updates the object if it's already in the db, else inserts it - -=cut +=head2 has_column + + if ($obj->has_column($col)) { ... } + +Returns 1 if the class has a column of this name, 0 otherwise. + +=cut -sub insert_or_update { - my $self = shift; - return ($self->in_storage ? $self->update : $self->insert); +sub has_column { + my ($self, $column) = @_; + return exists $self->_columns->{$column}; } -=item is_changed +=head2 column_info + + my $info = $obj->column_info($col); + +Returns the column metadata hashref for a column. + +=cut - my @changed_col_names = $obj->is_changed +sub column_info { + my ($self, $column) = @_; + die "No such column $column" unless exists $self->_columns->{$column}; + return $self->_columns->{$column}; +} -=cut +=head2 columns + + my @column_names = $obj->columns; + +=cut -sub is_changed { - return keys %{shift->{_dirty_columns} || {}}; +sub columns { + die "columns() is a read-only accessor, did you mean add_columns()?" if (@_ > 1); + return keys %{shift->_columns}; } -sub columns { return keys %{shift->_columns}; } - 1; -=back - =head1 AUTHORS -Matt S. Trout +Matt S. Trout =head1 LICENSE