Wiki::Toolkit::Setup::MySQL - Set up tables for a Wiki::Toolkit store in a MySQL database.

Wiki-Toolkit documentation Contained in the Wiki-Toolkit distribution.

Index

Code Index:

NAME

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Wiki::Toolkit::Setup::MySQL - Set up tables for a Wiki::Toolkit store in a MySQL database.

SYNOPSIS

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  use Wiki::Toolkit::Setup::MySQL;
  Wiki::Toolkit::Setup::MySQL::setup($dbname, $dbuser, $dbpass, $dbhost);

Omit $dbhost if the database is local.

DESCRIPTION

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Set up a MySQL database for use as a Wiki::Toolkit store.

FUNCTIONS

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setup
  use Wiki::Toolkit::Setup::MySQL;
  Wiki::Toolkit::Setup::MySQL::setup($dbname, $dbuser, $dbpass, $dbhost);

or

  Wiki::Toolkit::Setup::Mysql::setup( $dbh );

You can either provide an active database handle $dbh or connection parameters.

If you provide connection parameters the following arguments are mandatory -- the database name, the username and the password. The username must be able to create and drop tables in the database.

The $dbhost argument is optional -- omit it if the database is local.

NOTE: If a table that the module wants to create already exists, setup will leave it alone. This means that you can safely run this on an existing Wiki::Toolkit database to bring the schema up to date with the current Wiki::Toolkit version. If you wish to completely start again with a fresh database, run cleardb first.

cleardb
  use Wiki::Toolkit::Setup::MySQL;

  # Clear out all Wiki::Toolkit tables from the database.
  Wiki::Toolkit::Setup::MySQL::cleardb($dbname, $dbuser, $dbpass, $dbhost);

or

  Wiki::Toolkit::Setup::Mysql::cleardb( $dbh );

You can either provide an active database handle $dbh or connection parameters.

If you provide connection parameters the following arguments are mandatory -- the database name, the username and the password. The username must be able to drop tables in the database.

The $dbhost argument is optional -- omit if the database is local.

Clears out all Wiki::Toolkit store tables from the database. NOTE that this will lose all your data; you probably only want to use this for testing purposes or if you really screwed up somewhere. Note also that it doesn't touch any Wiki::Toolkit search backend tables; if you have any of those in the same or a different database see either Wiki::Toolkit::Setup::DBIxFTS or Wiki::Toolkit::Setup::SII, depending on which search backend you're using.

ALTERNATIVE CALLING SYNTAX

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As requested by Podmaster. Instead of passing arguments to the methods as

  ($dbname, $dbuser, $dbpass, $dbhost)

you can pass them as

  ( { dbname => $dbname,
      dbuser => $dbuser,
      dbpass => $dbpass,
      dbhost => $dbhost
    }
  )

or indeed as

  ( { dbh => $dbh } )

Note that's a hashref, not a hash.

AUTHOR

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Kake Pugh (kake@earth.li).

COPYRIGHT

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     Copyright (C) 2002-2004 Kake Pugh.  All Rights Reserved.
     Copyright (C) 2006-2008 the Wiki::Toolkit team. All Rights Reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

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Wiki::Toolkit, Wiki::Toolkit::Setup::DBIxMySQL, Wiki::Toolkit::Setup::SII

Wiki-Toolkit documentation Contained in the Wiki-Toolkit distribution. 
package Wiki::Toolkit::Setup::MySQL;

use strict;

use vars qw( @ISA $VERSION $SCHEMA_VERSION );

use Wiki::Toolkit::Setup::Database;

@ISA = qw( Wiki::Toolkit::Setup::Database );
$VERSION = '0.10';

use DBI;
use Carp;

$SCHEMA_VERSION = $VERSION*100;

my $create_sql = {
    8 => {
        schema_info => [ qq|
CREATE TABLE schema_info (
    version   int(10)      NOT NULL default 0
)
|, qq|
INSERT INTO schema_info VALUES (8)
| ],

        node => [ qq|
CREATE TABLE node (
    id        integer      NOT NULL AUTO_INCREMENT,
    name      varchar(200) NOT NULL DEFAULT '',
    version   int(10)      NOT NULL default 0,
    text      mediumtext   NOT NULL default '',
    modified  datetime     default NULL,
    PRIMARY KEY (id)
)
| ],

        content => [ qq|
CREATE TABLE content (
    node_id   integer      NOT NULL,
    version   int(10)      NOT NULL default 0,
    text      mediumtext   NOT NULL default '',
    modified  datetime     default NULL,
    comment   mediumtext   NOT NULL default '',
    PRIMARY KEY (node_id, version)
)
| ],
        internal_links => [ qq|
CREATE TABLE internal_links (
    link_from varchar(200) NOT NULL default '',
    link_to   varchar(200) NOT NULL default '',
    PRIMARY KEY (link_from, link_to)
)
| ],
        metadata => [ qq|
CREATE TABLE metadata (
    node_id        integer      NOT NULL,
    version        int(10)      NOT NULL default 0,
    metadata_type  varchar(200) NOT NULL DEFAULT '',
    metadata_value mediumtext   NOT NULL DEFAULT ''
)
|, qq|
CREATE INDEX metadata_index ON metadata(node_id, version, metadata_type, metadata_value(10))
| ]
    },
    9 => {
        schema_info => [ qq|
CREATE TABLE schema_info (
    version   int(10)      NOT NULL default 0
)
|, qq|
INSERT INTO schema_info VALUES (9)
| ],

        node => [ qq|
CREATE TABLE node (
    id        integer      NOT NULL AUTO_INCREMENT,
    name      varchar(200) NOT NULL DEFAULT '',
    version   int(10)      NOT NULL default 0,
    text      mediumtext   NOT NULL default '',
    modified  datetime     default NULL,
    moderate  bool         NOT NULL default '0',
    PRIMARY KEY (id)
)
| ],

        content => [ qq|
CREATE TABLE content (
    node_id   integer      NOT NULL,
    version   int(10)      NOT NULL default 0,
    text      mediumtext   NOT NULL default '',
    modified  datetime     default NULL,
    comment   mediumtext   NOT NULL default '',
    moderated bool         NOT NULL default '1',
    PRIMARY KEY (node_id, version)
)
| ],
        internal_links => [ qq|
CREATE TABLE internal_links (
    link_from varchar(200) NOT NULL default '',
    link_to   varchar(200) NOT NULL default '',
    PRIMARY KEY (link_from, link_to)
)
| ],
        metadata => [ qq|
CREATE TABLE metadata (
    node_id        integer      NOT NULL,
    version        int(10)      NOT NULL default 0,
    metadata_type  varchar(200) NOT NULL DEFAULT '',
    metadata_value mediumtext   NOT NULL DEFAULT ''
)
|, qq|
CREATE INDEX metadata_index ON metadata(node_id, version, metadata_type, metadata_value(10))
| ]
    },
    10 => {
        schema_info => [ qq|
CREATE TABLE schema_info (
    version   int(10)      NOT NULL default 0
)
|, qq|
INSERT INTO schema_info VALUES (10)
| ],

        node => [ qq|
CREATE TABLE node (
    id        integer      NOT NULL AUTO_INCREMENT,
    name      varchar(200) NOT NULL DEFAULT '',
    version   int(10)      NOT NULL default 0,
    text      mediumtext   NOT NULL default '',
    modified  datetime     default NULL,
    moderate  bool         NOT NULL default '0',
    PRIMARY KEY (id)
)
|, qq|
CREATE UNIQUE INDEX node_name ON node (name)
| ],

        content => [ qq|
CREATE TABLE content (
    node_id   integer      NOT NULL,
    version   int(10)      NOT NULL default 0,
    text      mediumtext   NOT NULL default '',
    modified  datetime     default NULL,
    comment   mediumtext   NOT NULL default '',
    moderated bool         NOT NULL default '1',
    verified  datetime     default NULL,
    verified_info mediumtext NOT NULL default '',
    PRIMARY KEY (node_id, version)
)
| ],
        internal_links => [ qq|
CREATE TABLE internal_links (
    link_from varchar(200) NOT NULL default '',
    link_to   varchar(200) NOT NULL default '',
    PRIMARY KEY (link_from, link_to)
)
| ],
        metadata => [ qq|
CREATE TABLE metadata (
    node_id        integer      NOT NULL,
    version        int(10)      NOT NULL default 0,
    metadata_type  varchar(200) NOT NULL DEFAULT '',
    metadata_value mediumtext   NOT NULL DEFAULT ''
)
|, qq|
CREATE INDEX metadata_index ON metadata(node_id, version, metadata_type, metadata_value(10))
| ]
    },
};

my %fetch_upgrades = (
    old_to_8  => 1,
    old_to_9  => 1,
    old_to_10 => 1,
    '8_to_9'  => 1,
    '8_to_10' => 1,
);

my %upgrades = (
    '9_to_10' => [ sub {
        my $dbh = shift;
        my $sth = $dbh->prepare('SHOW INDEX FROM node WHERE key_name="node_name"');
        $sth->execute();
        unless ( $sth->rows ) {
            $dbh->do('CREATE UNIQUE INDEX node_name ON node (name)')
                or croak $dbh->errstr;
        }
    },
    qq|
ALTER TABLE content ADD COLUMN verified datetime default NULL
|, qq|
ALTER TABLE content ADD COLUMN verified_info mediumtext NOT NULL default ''
|, qq|
UPDATE schema_info SET version = 10
| ]

);


sub setup {
    my @args = @_;
    my $dbh = _get_dbh( @args );
    my $disconnect_required = _disconnect_required( @args );
    my $wanted_schema = _get_wanted_schema( @args ) || $SCHEMA_VERSION;

    die "No schema information for requested schema version $wanted_schema\n"
        unless $create_sql->{$wanted_schema};

    # Check whether tables exist
    my %tables = fetch_tables_listing($dbh, $wanted_schema);

    # Do we need to upgrade the schema of existing tables?
    # (Don't check if no tables currently exist)
    my $upgrade_schema;
    my @cur_data;
    if(scalar keys %tables > 0) {
        $upgrade_schema = Wiki::Toolkit::Setup::Database::get_database_upgrade_required($dbh,$wanted_schema);
    }
    if($upgrade_schema) {
        if ($fetch_upgrades{$upgrade_schema}) {
            # Grab current data
            print "Upgrading: $upgrade_schema\n";
            @cur_data = eval("&Wiki::Toolkit::Setup::Database::fetch_upgrade_".$upgrade_schema."(\$dbh)");
            if($@) { warn $@; }

            # Check to make sure we can create, index and drop tables
            # before doing any more
            my $perm_check = Wiki::Toolkit::Setup::Database::perm_check($dbh);
            if ($perm_check) {
                die "Unable to create/drop database tables as required by upgrade: $perm_check";
            }
        
            # Drop the current tables
            cleardb($dbh);

            # Grab new list of tables
            %tables = fetch_tables_listing($dbh, $wanted_schema);
        }
    }

    # Set up tables if not found
    foreach my $required ( keys %{$create_sql->{$wanted_schema}} ) {
        if ( $tables{$required} ) {
            print "Table $required already exists... skipping...\n";
        } else {
            print "Creating table $required... done\n";
            foreach my $sql ( @{$create_sql->{$wanted_schema}->{$required}} ) {
                $dbh->do($sql) or croak $dbh->errstr;
            }
        }
    }

    # If upgrading, load in the new data
    if($upgrade_schema) {
        if ($fetch_upgrades{$upgrade_schema}) {
            Wiki::Toolkit::Setup::Database::bulk_data_insert($dbh,@cur_data);
        } else {
            print "Upgrading schema: $upgrade_schema\n";
            my @updates = @{$upgrades{$upgrade_schema}};
            foreach my $update (@updates) {
                if(ref($update) eq "CODE") {
                    &$update($dbh);
                } elsif(ref($update) eq "ARRAY") {
                    foreach my $nupdate (@$update) {
                        $dbh->do($nupdate);
                    }
                } else {
                    $dbh->do($update);
                }
            } 
        }
    }

    # Clean up if we made our own dbh.
    $dbh->disconnect if $disconnect_required;
}

# Internal method - what Wiki::Toolkit tables are defined?
sub fetch_tables_listing {
    my $dbh = shift;
    my $wanted_schema = shift;

    # Check what tables exist
    my $sth = $dbh->prepare("SHOW TABLES") or croak $dbh->errstr;
    $sth->execute;
    my %tables;
    while ( my $table = $sth->fetchrow_array ) {
        exists $create_sql->{$wanted_schema}->{$table} and $tables{$table} = 1;
    }
    return %tables;
}


sub cleardb {
    my @args = @_;
    my $dbh = _get_dbh( @args );
    my $disconnect_required = _disconnect_required( @args );

    print "Dropping tables... ";
    $dbh->do("DROP TABLE IF EXISTS " . join( ",", keys %{$create_sql->{$SCHEMA_VERSION}} ) )
      or croak $dbh->errstr;
    print "done\n";

    # Clean up if we made our own dbh.
    $dbh->disconnect if $disconnect_required;
}

sub _get_dbh {
    # Database handle passed in.
    if ( ref $_[0] and ref $_[0] eq 'DBI::db' ) {
        return $_[0];
    }

    # Args passed as hashref.
    if ( ref $_[0] and ref $_[0] eq 'HASH' ) {
        my %args = %{$_[0]};
        if ( $args{dbh} ) {
            return $args{dbh};
    } else {
            return _make_dbh( %args );
        }
    }

    # Args passed as list of connection details.
    return _make_dbh(
                      dbname => $_[0],
                      dbuser => $_[1],
                      dbpass => $_[2],
                      dbhost => $_[3],
                    );
}

sub _get_wanted_schema {
    # Database handle passed in.
    if ( ref $_[0] and ref $_[0] eq 'DBI::db' ) {
        return undef;
    }

    # Args passed as hashref.
    if ( ref $_[0] and ref $_[0] eq 'HASH' ) {
        my %args = %{$_[0]};
        return $args{wanted_schema};
    }
}

sub _disconnect_required {
    # Database handle passed in.
    if ( ref $_[0] and ref $_[0] eq 'DBI::db' ) {
        return 0;
    }

    # Args passed as hashref.
    if ( ref $_[0] and ref $_[0] eq 'HASH' ) {
        my %args = %{$_[0]};
        if ( $args{dbh} ) {
            return 0;
    } else {
            return 1;
        }
    }

    # Args passed as list of connection details.
    return 1;
}

sub _make_dbh {
    my %args = @_;
    my $dsn = "dbi:mysql:$args{dbname}";
    $dsn .= ";host=$args{dbhost}" if $args{dbhost};
    my $dbh = DBI->connect($dsn, $args{dbuser}, $args{dbpass},
               { PrintError => 1, RaiseError => 1,
                 AutoCommit => 1 } )
        or croak DBI::errstr;
    return $dbh;
}


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