be alarmed if the error from incorrect connection details happens a
lot later.
+=item .. use DBIx::Class across multiple databases?
+
+If your database server allows you to run querys across multiple
+databases at once, then so can DBIx::Class. All you need to do is make
+sure you write the database name as part of the
+L<DBIx::Class::ResultSource/table> call. Eg:
+
+ __PACKAGE__->table('mydb.mytablename');
+
+And load all the Result classes for both / all databases using one
+L<DBIx::Class::Schema/load_namespaces> call.
+
+=item .. use DBIx::Class across PostgreSQL/DB2/Oracle schemas?
+
+Add the name of the schema to the L<DBIx::Class::ResultSource/table>
+as part of the name, and make sure you give the one user you are going
+to connect with rights to read/write all the schemas/tables as
+necessary.
=back
Or, if you have quoting off:
- ->search({ 'YEAR(date_of_birth' => 1979 });
+ ->search({ 'YEAR(date_of_birth)' => 1979 });
=item .. find more help on constructing searches?
L<DBIx::Class::Manual::Cookbook>, try looking in the SQL::Abstract
documentation.
+=item .. make searches in Oracle (10gR2 and newer) case-insensitive?
+
+To make Oracle behave like most RDBMS use on_connect_do to issue
+alter session statements on database connection establishment:
+
+ ->on_connect_do("ALTER SESSION SET NLS_COMP = 'LINGUISTIC'");
+ ->on_connect_do("ALTER SESSION SET NLS_SORT = '<NLS>_CI'");
+ e.g.
+ ->on_connect_do("ALTER SESSION SET NLS_SORT = 'BINARY_CI'");
+ ->on_connect_do("ALTER SESSION SET NLS_SORT = 'GERMAN_CI'");
+
+
=back
=head2 Fetching data
L<DBIx::Class::PK/discard_changes> does just that by re-fetching the row from storage
using the row's primary key.
+=item .. fetch my data a "page" at a time?
+
+Pass the C<rows> and C<page> attributes to your search, eg:
+
+ ->search({}, { rows => 10, page => 1});
+
+=item .. get a count of all rows even when paging?
+
+Call C<pager> on the paged resultset, it will return a L<Data::Page>
+object. Calling C<total_entries> on the pager will return the correct
+total.
+
+C<count> on the resultset will only return the total number in the page.
+
=back
=head2 Inserting and updating data
You can add your own data accessors to your classes.
+One method is to use the built in mk_group_accessors (via L<Class::Accessor::Grouped>)
+
+ package MyTable;
+
+ use parent 'DBIx::Class';
+
+ __PACKAGE__->table('foo'); #etc
+ __PACKAGE__->mk_group_accessors('simple' => qw/non_column_data/); # must use simple group
+
+An another method is to use L<Moose> with your L<DBIx::Class> package.
+
+ package MyTable;
+
+ use Moose; # import Moose
+ use Moose::Util::TypeConstraint; # import Moose accessor type constraints
+
+ extends 'DBIx::Class'; # Moose changes the way we define our parent (base) package
+
+ has 'non_column_data' => ( is => 'rw', isa => 'Str' ); # define a simple attribute
+
+ __PACKAGE__->table('foo'); # etc
+
+With either of these methods the resulting use of the accesssor would be
+
+ my $row;
+
+ # assume that some where in here $row will get assigned to a MyTable row
+
+ $row->non_column_data('some string'); # would set the non_column_data accessor
+
+ # some other stuff happens here
+
+ $row->update(); # would not inline the non_column_data accessor into the update
+
+
=item How do I use DBIx::Class objects in my TT templates?
Like normal objects, mostly. However you need to watch out for TT
$resultset->set_primary_key(@column);
+=item How do I make my program start faster?
+
+Look at the tips in L<DBIx::Class::Manual::Cookbook/"STARTUP SPEED">
+
+=item How do I reduce the overhead of database queries?
+
+You can reduce the overhead of object creation within L<DBIx::Class>
+using the tips in L<DBIx::Class::Manual::Cookbook/"Skip row object creation for faster results">
+and L<DBIx::Class::Manual::Cookbook/"Get raw data for blindingly fast results">
+
=back
=head2 Notes for CDBI users
See L<DBIx::Class::Manual::Cookbook/Stringification>
=back
+
+=head2 Troubleshooting
+
+=over 4
+
+=item Help, I can't connect to postgresql!
+
+If you get an error such as:
+
+ DBI connect('dbname=dbic','user',...) failed: could not connect to server:
+ No such file or directory Is the server running locally and accepting
+ connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
+
+Likely you have/had two copies of postgresql installed simultaneously, the
+second one will use a default port of 5433, while L<DBD::Pg> is compiled with a
+default port of 5432.
+
+You can chance the port setting in C<postgresql.conf>.
+
+=item I've lost or forgotten my mysql password
+
+Stop mysqld and restart it with the --skip-grant-tables option.
+
+Issue the following statements in the mysql client.
+
+ UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root';
+ FLUSH PRIVILEGES;
+
+Restart mysql.
+
+Taken from:
+
+L<http://dev.mysql.com/doc/refman/5.1/en/resetting-permissions.html>.
+
+=back
projects / dbsrgits/DBIx-Class.git / blobdiff