package Maypole::Model::CDBI;
-use base qw(Maypole::Model::Base Class::DBI);
-use Class::DBI::AsForm;
-use Class::DBI::FromCGI;
-use Class::DBI::Loader;
-use Class::DBI::AbstractSearch;
-use Class::DBI::Plugin::RetrieveAll;
-use Class::DBI::Pager;
-
-use Lingua::EN::Inflect::Number qw(to_PL);
-use CGI::Untaint;
use strict;
+use Data::Dumper;
+
=head1 NAME
Maypole::Model::CDBI - Model class based on Class::DBI
=head1 DESCRIPTION
-This is a master model class which uses C<Class::DBI> to do all the hard
+This is a master model class which uses L<Class::DBI> to do all the hard
work of fetching rows and representing them as objects. It is a good
model to copy if you're replacing it with other database abstraction
modules.
+It implements a base set of methods required for a Maypole Data Model.
+
+It inherits accessor and helper methods from L<Maypole::Model::Base>.
+
+When specified as the application model, it will use Class::DBI::Loader
+to generate the model classes from the provided database. If you do not
+wish to use this functionality, use L<Maypole::Model::CDBI::Plain> which
+will instead use Class::DBI classes provided.
+
=cut
-sub related {
- my ($self, $r) = @_;
- # Has-many methods; XXX this is a hack
- map {to_PL($_)}
- grep { exists $r->{config}{ok_tables}{$_} }
- map {$_->table}
- keys %{shift->__hasa_list || {}}
-}
-
-sub do_edit :Exported {
- my ($self, $r) = @_;
- my $h = CGI::Untaint->new(%{$r->{params}});
- my ($obj) = @{$r->objects || []};
- if ($obj) {
- # We have something to edit
- $obj->update_from_cgi($h);
- } else {
- $obj = $self->create_from_cgi($h);
+use base qw(Maypole::Model::Base Class::DBI);
+#use Class::DBI::Plugin::Type;
+use Class::DBI::Loader;
+use Class::DBI::AbstractSearch;
+use Class::DBI::Plugin::RetrieveAll;
+use Class::DBI::Pager;
+use Lingua::EN::Inflect::Number qw(to_PL);
+use attributes ();
+
+use Maypole::Model::CDBI::AsForm;
+use Maypole::Model::CDBI::FromCGI;
+use CGI::Untaint::Maypole;
+
+=head2 Untainter
+
+Set the class you use to untaint and validate form data
+Note it must be of type CGI::Untaint::Maypole (takes $r arg) or CGI::Untaint
+
+=cut
+sub Untainter { 'CGI::Untaint::Maypole' };
+
+# or if you like bugs
+
+#use Class::DBI::FromCGI;
+#use CGI::Untaint;
+#sub Untainter { 'CGI::Untaint' };
+
+
+__PACKAGE__->mk_classdata($_) for (qw/COLUMN_INFO/);
+
+=head1 Action Methods
+
+Action methods are methods that are accessed through web (or other public) interface.
+
+=head2 do_edit
+
+If there is an object in C<$r-E<gt>objects>, then it should be edited
+with the parameters in C<$r-E<gt>params>; otherwise, a new object should
+be created with those parameters, and put back into C<$r-E<gt>objects>.
+The template should be changed to C<view>, or C<edit> if there were any
+errors. A hash of errors will be passed to the template.
+
+=cut
+
+sub do_edit : Exported {
+ my ($self, $r, $obj) = @_;
+
+ my $config = $r->config;
+ my $table = $r->table;
+
+ # handle cancel button hit
+ if ( $r->{params}->{cancel} ) {
+ $r->template("list");
+ $r->objects( [$self->retrieve_all] );
+ return;
+ }
+
+ my $required_cols = $config->{$table}{required_cols} || $self->required_columns;
+ my $ignored_cols = $config->{$table}{ignore_cols} || [];
+
+ ($obj, my $fatal, my $creating) = $self->_do_update_or_create($r, $obj, $required_cols, $ignored_cols);
+
+ # handle errors, if none, proceed to view the newly created/updated object
+ my %errors = $fatal ? (FATAL => $fatal) : $obj->cgi_update_errors;
+
+ if (%errors) {
+ # Set it up as it was:
+ $r->template_args->{cgi_params} = $r->params;
+
+ # replace user unfriendly error messages with something nicer
+
+ foreach (@{$config->{$table}->{required_cols}}) {
+ next unless ($errors{$_});
+ my $key = $_;
+ s/_/ /g;
+ $r->template_args->{errors}{ucfirst($_)} = 'This field is required, please provide a valid value';
+ $r->template_args->{errors}{$key} = 'This field is required, please provide a valid value';
+ delete $errors{$key};
}
- if (my %errors = $obj->cgi_update_errors) {
- # Set it up as it was:
- $r->{template_args}{cgi_params} = $r->{params};
- $r->{template_args}{errors} = \%errors;
- $r->{template} = "edit";
- } else {
- $r->{template} = "view";
+
+ foreach (keys %errors) {
+ my $key = $_;
+ s/_/ /g;
+ $r->template_args->{errors}{ucfirst($_)} = 'Please provide a valid value for this field';
+ $r->template_args->{errors}{$key} = 'Please provide a valid value for this field';
}
- $r->objects([ $obj ]);
+
+ undef $obj if $creating;
+
+ die "do_update failed with error : $fatal" if ($fatal);
+ $r->template("edit");
+ } else {
+ $r->template("view");
+ }
+
+
+
+ $r->objects( $obj ? [$obj] : []);
}
-sub delete :Exported {
- return shift->SUPER::delete(@_) if caller ne "Maypole::Model::Base";
- my ($self, $r) = @_;
- $_->SUPER::delete for @{ $r->objects || [] };
- $r->objects([ $self->retrieve_all ]);
- $r->{template} = "list";
- $self->list($r);
+# split out from do_edit to be reported by Mp::P::Trace
+sub _do_update_or_create {
+ my ($self, $r, $obj, $required_cols, $ignored_cols) = @_;
+
+ my $fatal;
+ my $creating = 0;
+
+ my $h = $self->Untainter->new( %{$r->params} );
+
+ # update or create
+ if ($obj) {
+ # We have something to edit
+ eval { $obj->update_from_cgi( $h => {
+ required => $required_cols,
+ ignore => $ignored_cols,
+ });
+ $obj->update(); # pos fix for bug 17132 'autoupdate required by do_edit'
+ };
+ $fatal = $@;
+ } else {
+ eval {
+ $obj = $self->create_from_cgi( $h => {
+ required => $required_cols,
+ ignore => $ignored_cols,
+ } );
+ };
+ $fatal = $@;
+ $creating++;
+ }
+ return $obj, $fatal, $creating;
}
-sub stringify_column {
- my $class = shift;
- return ($class->columns("Stringify"),
- (grep { $_ ne "id" } $class->primary_columns),
- (grep { $_ eq "name" } $class->columns)
- )[0];
+=head2 delete
+
+Deprecated method that calls do_delete or a given classes delete method, please
+use do_delete instead
+
+=head2 do_delete
+
+Unsuprisingly, this command causes a database record to be forever lost.
+
+This method replaces the, now deprecated, delete method provided in prior versions
+
+=cut
+
+sub delete : Exported {
+ my $self = shift;
+ my ($sub) = (caller(1))[3];
+ # So subclasses can still send delete down ...
+ $sub =~ /^(.+)::([^:]+)$/;
+ if ($1 ne "Maypole::Model::Base" && $2 ne "delete") {
+ $self->SUPER::delete(@_);
+ } else {
+ warn "Maypole::Model::CDBI delete method is deprecated\n";
+ $self->do_delete(@_);
+ }
}
-sub adopt {
- my ($self, $child) = @_;
- $child->autoupdate(1);
- if (my $col = $child->stringify_column) {
- $child->columns( Stringify => $col );
- }
+sub do_delete {
+ my ( $self, $r ) = @_;
+ # FIXME: handle fatal error with exception
+ $_->SUPER::delete for @{ $r->objects || [] };
+# $self->dbi_commit;
+ $r->objects( [ $self->retrieve_all ] );
+ $r->{template} = "list";
+ $self->list($r);
}
-sub search :Exported {
- return shift->SUPER::search(@_) if caller ne "Maypole::Model::Base";
- # A real CDBI search.
- my ($self, $r) = @_;
- my %fields = map {$_ => 1 } $self->columns;
- my $oper = "like"; # For now
- my %params = %{$r->{params}};
- my %values = map { $_ => {$oper, $params{$_} } }
- grep { $params{$_} and $fields{$_} } keys %params;
+=head2 search
+
+Deprecated searching method - use do_search instead.
+
+=head2 do_search
+
+This action method searches for database records, it replaces
+the, now deprecated, search method previously provided.
+
+=cut
+
+sub search : Exported {
+ my $self = shift;
+ my ($sub) = (caller(1))[3];
+ # So subclasses can still send search down ...
+ if ($sub =~ /^(.+)::([^:]+)$/) {
+ return ($1 ne "Maypole::Model::Base" && $2 ne "search") ?
+ $self->SUPER::search(@_) : $self->do_search(@_);
+ } else {
+ $self->SUPER::search(@_);
+ }
+}
+
+sub do_search : Exported {
+ my ( $self, $r ) = @_;
+ my %fields = map { $_ => 1 } $self->columns;
+ my $oper = "like"; # For now
+ my %params = %{ $r->{params} };
+ my %values = map { $_ => { $oper, $params{$_} } }
+ grep { defined $params{$_} && length ($params{$_}) && $fields{$_} }
+ keys %params;
$r->template("list");
- if (!%values) { return $self->list($r) }
+ if ( !%values ) { return $self->list($r) }
my $order = $self->order($r);
$self = $self->do_pager($r);
- $r->objects([ $self->search_where(\%values),
- ($order ? { order => $order } : ())
- ]);
+ $r->objects(
+ [
+ $self->search_where(
+ \%values, ( $order ? { order_by => $order } : () )
+ )
+ ]
+ );
$r->{template_args}{search} = 1;
}
-sub do_pager {
- my ($self, $r) = @_;
- if ( my $rows = $r->config->{rows_per_page}) {
- return $r->{template_args}{pager} = $self->pager($rows, $r->query->{page});
- } else { return $self }
+=head2 list
+
+The C<list> method fills C<$r-E<gt>objects> with all of the
+objects in the class. The results are paged using a pager.
+
+=cut
+
+sub list : Exported {
+ my ( $self, $r ) = @_;
+ my $order = $self->order($r);
+ $self = $self->do_pager($r);
+ if ($order) {
+ $r->objects( [ $self->retrieve_all_sorted_by($order) ] );
+ }
+ else {
+ $r->objects( [ $self->retrieve_all ] );
+ }
}
-sub order {
- my ($self, $r) = @_;
- my $order;
- my %ok_columns = map {$_ => 1} $self->columns;
- if ($order = $r->query->{order} and $ok_columns{$order}) {
- $order .= ($r->query->{o2} eq "desc" && " DESC")
+###############################################################################
+# Helper methods
+
+=head1 Helper Methods
+
+
+=head2 adopt
+
+This class method is passed the name of a model class that represensts a table
+and allows the master model class to do any set-up required.
+
+=cut
+
+sub adopt {
+ my ( $self, $child ) = @_;
+ $child->autoupdate(1);
+ if ( my $col = $child->stringify_column ) {
+ $child->columns( Stringify => $col );
}
- $order;
}
-sub list :Exported {
- my ($self, $r) = @_;
- my $order = $self->order($r);
- $self = $self->do_pager($r);
- if ($order) {
- $r->objects([ $self->retrieve_all_sorted_by( $order )]);
- } else {
- $r->objects([ $self->retrieve_all ]);
+
+=head2 related
+
+This method returns a list of has-many accessors. A brewery has many
+beers, so C<BeerDB::Brewery> needs to return C<beers>.
+
+=cut
+
+sub related {
+ my ( $self, $r ) = @_;
+ return keys %{ $self->meta_info('has_many') || {} };
+}
+
+
+=head2 related_class
+
+Given an accessor name as a method, this function returns the class this accessor returns.
+
+=cut
+
+sub related_class {
+ my ( $self, $r, $accessor ) = @_;
+ my $meta = $self->meta_info;
+ my @rels = keys %$meta;
+ my $related;
+ foreach (@rels) {
+ $related = $meta->{$_}{$accessor};
+ last if $related;
+ }
+ return unless $related;
+
+ my $mapping = $related->{args}->{mapping};
+ if ( $mapping and @$mapping ) {
+ return $related->{foreign_class}->meta_info('has_a')->{$$mapping[0]}->{foreign_class};
+ }
+ else {
+ return $related->{foreign_class};
+ }
+ }
+
+=head2 related_meta
+
+ $class->related_meta($col);
+
+Returns the hash ref of relationship meta info for a given column.
+
+=cut
+
+sub related_meta {
+ my ($self,$r, $accssr) = @_;
+ $self->_croak("You forgot to put the place holder for 'r' or forgot the accssr parameter") unless $accssr;
+ my $class_meta = $self->meta_info;
+ if (my ($rel_type) = grep { defined $class_meta->{$_}->{$accssr} }
+ keys %$class_meta)
+ { return $class_meta->{$rel_type}->{$accssr} };
+}
+
+
+
+=head2 stringify_column
+
+ Returns the name of the column to use when stringifying
+ and object.
+
+=cut
+
+sub stringify_column {
+ my $class = shift;
+ return (
+ $class->columns("Stringify"),
+ ( grep { /^(name|title)$/i } $class->columns ),
+ ( grep { /(name|title)/i } $class->columns ),
+ ( grep { !/id$/i } $class->primary_columns ),
+ )[0];
+}
+
+=head2 do_pager
+
+ Sets the pager template argument ($r->{template_args}{pager})
+ to a Class::DBI::Pager object based on the rows_per_page
+ value set in the configuration of the application.
+
+ This pager is used via the pager macro in TT Templates, and
+ is also accessible via Mason.
+
+=cut
+
+sub do_pager {
+ my ( $self, $r ) = @_;
+ if ( my $rows = $r->config->rows_per_page ) {
+ return $r->{template_args}{pager} =
+ $self->pager( $rows, $r->query->{page} );
}
+ else { return $self }
+}
+
+
+=head2 order
+
+ Returns the SQL order syntax based on the order parameter passed
+ to the request, and the valid columns.. i.e. 'title ASC' or 'date_created DESC'.
+
+ $sql .= $self->order($r);
+
+ If the order column is not a column of this table,
+ or an order argument is not passed, then the return value is undefined.
+
+ Note: the returned value does not start with a space.
+
+=cut
+
+sub order {
+ my ( $self, $r ) = @_;
+ my %ok_columns = map { $_ => 1 } $self->columns;
+ my $q = $r->query;
+ my $order = $q->{order};
+ return unless $order and $ok_columns{$order};
+ $order .= ' DESC' if $q->{o2} and $q->{o2} eq 'desc';
+ return $order;
}
+=head2 setup
+
+ This method is inherited from Maypole::Model::Base and calls setup_database,
+ which uses Class::DBI::Loader to create and load Class::DBI classes from
+ the given database schema.
+
+=cut
+
+=head2 setup_database
+
+The $opts argument is a hashref of options. The "options" key is a hashref of
+Database connection options . Other keys may be various Loader arguments or
+flags. It has this form:
+ {
+ # DB connection options
+ options { AutoCommit => 1 , ... },
+ # Loader args
+ relationships => 1,
+ ...
+ }
+
+=cut
+
sub setup_database {
- my ($self, $config, $namespace, $dsn, $u, $p) = @_;
- $config->{dsn} = $dsn;
- $config->{loader} = Class::DBI::Loader->new(
- namespace => $namespace,
- dsn => $dsn,
- user => $u,
- password => $p,
+ my ( $class, $config, $namespace, $dsn, $u, $p, $opts ) = @_;
+ $dsn ||= $config->dsn;
+ $u ||= $config->user;
+ $p ||= $config->pass;
+ $opts ||= $config->opts;
+ $config->dsn($dsn);
+ warn "No DSN set in config" unless $dsn;
+ $config->loader || $config->loader(
+ Class::DBI::Loader->new(
+ namespace => $namespace,
+ dsn => $dsn,
+ user => $u,
+ password => $p,
+ %$opts,
+ )
);
$config->{classes} = [ $config->{loader}->classes ];
$config->{tables} = [ $config->{loader}->tables ];
+
+ my @table_class = map { $_ . " => " . $config->{loader}->_table2class($_) } @{ $config->{tables} };
+ warn( 'Loaded tables to classes: ' . join ', ', @table_class )
+ if $namespace->debug;
}
+=head2 class_of
+
+ returns class for given table
+
+=cut
+
sub class_of {
- my ($self, $r, $table) = @_;
- return $r->config->{loader}->_table2class($table);
+ my ( $self, $r, $table ) = @_;
+ return $r->config->loader->_table2class($table); # why not find_class ?
}
-1;
+=head2 fetch_objects
+
+Returns 1 or more objects of the given class when provided with the request
+
+=cut
+
+sub fetch_objects {
+ my ($class, $r)=@_;
+ my @pcs = $class->primary_columns;
+ if ( $#pcs ) {
+ my %pks;
+ @pks{@pcs}=(@{$r->{args}});
+ return $class->retrieve( %pks );
+ }
+ return $class->retrieve( $r->{args}->[0] );
+}
+
+
+
+
+
+=head2 _isa_class
+
+Private method to return the class a column
+belongs to that was inherited by an is_a relationship.
+This should probably be public but need to think of API
+
+=cut
+
+sub _isa_class {
+ my ($class, $col) = @_;
+ $class->_croak( "Need a column for _isa_class." ) unless $col;
+ my $isaclass;
+ my $isa = $class->meta_info("is_a") || {};
+ foreach ( keys %$isa ) {
+ $isaclass = $isa->{$_}->foreign_class;
+ return $isaclass if ($isaclass->find_column($col));
+ }
+ return; # col not in a is_a class
+}
+
+
+# Thanks to dave baird -- form builder for these private functions
+# sub _column_info {
+sub _column_info {
+ my $self = shift;
+ my $dbh = $self->db_Main;
+
+ my $meta; # The info we are after
+ my ($catalog, $schema) = (undef, undef);
+ # Dave is suspicious this (above undefs) could
+ # break things if driver useses this info
+
+ my $original_metadata;
+ # '%' is a search pattern for columns - matches all columns
+ if ( my $sth = $dbh->column_info( $catalog, $schema, $self->table, '%' ) ) {
+ $dbh->errstr && die "Error getting column info sth: " . $dbh->errstr;
+ $self->COLUMN_INFO ($self->_hash_type_meta( $sth ));
+ } else {
+ $self->COLUMN_INFO ($self->_hash_typeless_meta( ));
+ }
+
+ return $self->COLUMN_INFO;
+}
+
+sub _hash_type_meta {
+ my ($self, $sth) = @_;
+ my $meta;
+ while ( my $row = $sth->fetchrow_hashref ) {
+ my $colname = $row->{COLUMN_NAME} || $row->{column_name};
+
+ # required / nullable
+ $meta->{$colname}{nullable} = $row->{NULLABLE};
+ $meta->{$colname}{required} = ( $meta->{$colname}{nullable} == 0 ) ? 1 : 0;
+
+ # default
+ if (defined $row->{COLUMN_DEF}) {
+ my $default = $row->{COLUMN_DEF};
+ $default =~ s/['"]?(.*?)['"]?::.*$/$1/;
+ $meta->{$colname}{default} = $default;
+ }else {
+ $meta->{$colname}{default} = '';
+ }
+
+ # type
+ my $type = $row->{mysql_type_name} || $row->{type};
+ unless ($type) {
+ $type = $row->{TYPE_NAME};
+ if ($row->{COLUMN_SIZE}) {
+ $type .= "($row->{COLUMN_SIZE})";
+ }
+ }
+ $type =~ s/['"]?(.*)['"]?::.*$/$1/;
+ # Bool if tinyint
+ if ($type and $type =~ /^tinyint/i and $row->{COLUMN_SIZE} == 1) {
+ $type = 'BOOL';
+ }
+ $meta->{$colname}{type} = $type;
+
+ # order
+ $meta->{$colname}{position} = $row->{ORDINAL_POSITION}
+ }
+ return $meta;
+}
+
+# typeless db e.g. sqlite
+sub _hash_typeless_meta {
+ my ( $self ) = @_;
+
+ $self->set_sql( fb_meta_dummy => 'SELECT * FROM __TABLE__ WHERE 1=0' )
+ unless $self->can( 'sql_fb_meta_dummy' );
+ my $sth = $self->sql_fb_meta_dummy;
+
+ $sth->execute or die "Error executing column info: " . $sth->errstr;;
+
+ # see 'Statement Handle Attributes' in the DBI docs for a list of available attributes
+ my $cols = $sth->{NAME};
+ my $types = $sth->{TYPE};
+ # my $sizes = $sth->{PRECISION}; # empty
+ # my $nulls = $sth->{NULLABLE}; # empty
+
+ # we haven't actually fetched anything from the sth, so need to tell DBI we're not going to
+ $sth->finish;
+
+ my $order = 0;
+ my $meta;
+ foreach my $col ( @$cols ) {
+ my $col_meta;
+ $col_meta->{nullable} = 1;
+ $col_meta->{required} = 0;
+ $col_meta->{default} = '';
+ $col_meta->{position} = $order++;
+ # type_name is taken literally from the schema, but is not actually used by sqlite,
+ # so it can be anything, e.g. varchar or varchar(xxx) or VARCHAR etc.
+ my $type = shift( @$types );
+ $col_meta->{type} = ($type =~ /(\w+)\((\w+)\)/) ? $1 :$type ;
+ $meta->{$col} = $col_meta;
+ }
+ return $meta;
+}
+
+=head2 column_type
+
+ my $type = $class->column_type('column_name');
+
+This returns the 'type' of this column (VARCHAR(20), BIGINT, etc.)
+For now, it returns "BOOL" for tinyints.
+
+TODO :: TEST with enums
+
+=cut
+
+sub column_type {
+ my $class = shift;
+ my $colname = shift or die "Need a column for column_type";
+ $class->_column_info() unless (ref $class->COLUMN_INFO);
+
+ if ($class->_isa_class($colname)) {
+ return $class->_isa_class($colname)->column_type($colname);
+ }
+ unless ( $class->find_column($colname) ) {
+ warn "$colname is not a recognised column in this class ", ref $class || $class, "\n";
+ return undef;
+ }
+ return $class->COLUMN_INFO->{$colname}{type};
+}
+
+=head2 required_columns
+
+ Accessor to get/set required columns for forms, validation, etc.
+
+ Returns list of required columns. Accepts an array ref of column names.
+
+ $class->required_columns([qw/foo bar baz/]);
+
+ Allows you to specify the required columns for a class, over-riding any
+ assumptions and guesses made by Maypole.
+
+ Use this instead of $config->{$table}{required_cols}
+
+ Note : you need to setup the model class before calling this method.
+
+=cut
+
+sub required_columns {
+ my ($class, $columns) = @_;
+ $class->_column_info() unless ref $class->COLUMN_INFO;
+ my $column_info = $class->COLUMN_INFO;
+
+ if ($columns) {
+ foreach my $colname ( @$columns ) {
+ if ($class->_isa_class($colname)) {
+ $class->_isa_class($colname)->COLUMN_INFO->{$colname}{required} = 1
+ unless ($class->_isa_class($colname)->column_required);
+ next;
+ }
+ unless ( $class->find_column($colname) ) {
+ warn "$colname is not a recognised column in this class ", ref $class || $class, "\n";
+ next;
+ }
+ $column_info->{$colname}{required} = 1;
+ }
+ $class->COLUMN_INFO($column_info);
+ }
+
+ return [ grep ($column_info->{$_}{required}, keys %$column_info) ] ;
+}
+
+=head2 column_required
+
+ Returns true if a column is required
+
+ my $required = $class->column_required($column_name);
+
+ Columns can be required by the application but not the database, but not the other way around,
+ hence there is also a column_nullable method which will tell you if the column is nullable
+ within the database itself.
+
+=cut
+
+sub column_required {
+ my ($class, $colname) = @_;
+ $colname or $class->_croak( "Need a column for column_nullable" );
+ $class->_column_info() unless ref $class->COLUMN_INFO;
+ if ($class->_isa_class($colname)) {
+ return $class->_isa_class($colname)->column_required($colname);
+ }
+ unless ( $class->find_column($colname) ) {
+ # handle non-existant columns
+ warn "$colname is not a recognised column in this class ", ref $class || $class, "\n";
+ return undef;
+ }
+ return $class->COLUMN_INFO->{$colname}{required} || 0;
+}
+
+=head2 column_nullable
+
+ Returns true if a column can be NULL within the underlying database and false if not.
+
+ my $nullable = $class->column_nullable($column_name);
+
+ Any columns that are not nullable will automatically be specified as required, you can
+ also specify nullable columns as required within your application.
+
+ It is recomended you use column_required rather than column_nullable within your
+ application, this method is more useful if extending the model or handling your own
+ validation.
+
+=cut
+
+sub column_nullable {
+ my $class = shift;
+ my $colname = shift or $class->_croak( "Need a column for column_nullable" );
+
+ $class->_column_info() unless ref $class->COLUMN_INFO;
+ if ($class->_isa_class($colname)) {
+ return $class->_isa_class($colname)->column_nullable($colname);
+ }
+ unless ( $class->find_column($colname) ) {
+ # handle non-existant columns
+ warn "$colname is not a recognised column in this class ", ref $class || $class, "\n";
+ return undef;
+ }
+ return $class->COLUMN_INFO->{$colname}{nullable} || 0;
+}
+
+=head2 column_default
+
+Returns default value for column or the empty string.
+Columns with NULL, CURRENT_TIMESTAMP, or Zeros( 0000-00...) for dates and times
+have '' returned.
+
+=cut
+
+sub column_default {
+ my $class = shift;
+ my $colname = shift or $class->_croak( "Need a column for column_default");
+ $class->_column_info() unless (ref $class->COLUMN_INFO);
+ if ($class->_isa_class($colname)) {
+ return $class->_isa_class($colname)->column_default($colname);
+ }
+ unless ( $class->find_column($colname) ) {
+ warn "$colname is not a recognised column in this class ", ref $class || $class, "\n";
+ return undef;
+ }
+
+ return $class->COLUMN_INFO->{$colname}{default};
+}
+
+=head2 get_classmetadata
+
+Gets class meta data *excluding cgi input* for the passed in class or the
+calling class. *NOTE* excludes cgi inputs. This method is handy to call from
+templates when you need some metadata for a related class.
+
+=cut
+
+sub get_classmetadata {
+ my ($self, $class) = @_; # class is class we want data for
+ $class ||= $self;
+ $class = ref $class || $class;
+
+ my %res;
+ $res{name} = $class;
+ $res{colnames} = {$class->column_names};
+ $res{columns} = [$class->display_columns];
+ $res{list_columns} = [$class->list_columns];
+ $res{moniker} = $class->moniker;
+ $res{plural} = $class->plural_moniker;
+ $res{table} = $class->table;
+ $res{column_metadata} = (ref $class->COLUMN_INFO) ? $class->COLUMN_INFO : $class->_column_info() ;
+ return \%res;
+}
+
+
+1;
projects / maypole.git / blobdiff