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[dbsrgits/DBIx-Class-DeploymentHandler.git] / lib / DBIx / Class / DeploymentHandler.pm
1 package DBIx::Class::DeploymentHandler;
2
3 # ABSTRACT: Extensible DBIx::Class deployment
4
5 use Moose;
6
7 extends 'DBIx::Class::DeploymentHandler::Dad';
8 # a single with would be better, but we can't do that
9 # see: http://rt.cpan.org/Public/Bug/Display.html?id=46347
10 with 'DBIx::Class::DeploymentHandler::WithApplicatorDumple' => {
11     interface_role       => 'DBIx::Class::DeploymentHandler::HandlesDeploy',
12     class_name           => 'DBIx::Class::DeploymentHandler::DeployMethod::SQL::Translator',
13     delegate_name        => 'deploy_method',
14     attributes_to_assume => ['schema'],
15     attributes_to_copy   => [qw( databases upgrade_directory sql_translator_args )],
16   },
17   'DBIx::Class::DeploymentHandler::WithApplicatorDumple' => {
18     interface_role       => 'DBIx::Class::DeploymentHandler::HandlesVersioning',
19     class_name           => 'DBIx::Class::DeploymentHandler::VersionHandler::Monotonic',
20     delegate_name        => 'version_handler',
21     attributes_to_assume => [qw( database_version schema_version to_version )],
22   },
23   'DBIx::Class::DeploymentHandler::WithApplicatorDumple' => {
24     interface_role       => 'DBIx::Class::DeploymentHandler::HandlesVersionStorage',
25     class_name           => 'DBIx::Class::DeploymentHandler::VersionStorage::Standard',
26     delegate_name        => 'version_storage',
27     attributes_to_assume => ['schema'],
28   };
29 with 'DBIx::Class::DeploymentHandler::WithReasonableDefaults';
30
31 sub prepare_version_storage_install {
32   my $self = shift;
33
34   $self->prepare_resultsource_install(
35     $self->version_storage->version_rs->result_source
36   );
37 }
38
39 sub install_version_storage {
40   my $self = shift;
41
42   $self->install_resultsource(
43     $self->version_storage->version_rs->result_source
44   );
45 }
46
47 sub prepare_install {
48   $_[0]->prepare_deploy;
49   $_[0]->prepare_version_storage_install;
50 }
51
52 __PACKAGE__->meta->make_immutable;
53
54 1;
55
56 #vim: ts=2 sw=2 expandtab
57
58 __END__
59
60 =head1 SYNOPSIS
61
62  use aliased 'DBIx::Class::DeploymentHandler' => 'DH';
63  my $s = My::Schema->connect(...);
64
65  my $dh = DH->new({
66    schema              => $s,
67    databases           => 'SQLite',
68    sql_translator_args => { add_drop_table => 0 },
69  });
70
71  $dh->prepare_install;
72
73  $dh->install;
74
75 or for upgrades:
76
77  use aliased 'DBIx::Class::DeploymentHandler' => 'DH';
78  my $s = My::Schema->connect(...);
79
80  my $dh = DH->new({
81    schema              => $s,
82    databases           => 'SQLite',
83    sql_translator_args => { add_drop_table => 0 },
84  });
85
86  $dh->prepare_upgrade(1, 2);
87
88  $dh->upgrade;
89
90 =head1 DESCRIPTION
91
92 C<DBIx::Class::DeploymentHandler> is, as it's name suggests, a tool for
93 deploying and upgrading databases with L<DBIx::Class>.  It is designed to be
94 much more flexible than L<DBIx::Class::Schema::Versioned>, hence the use of
95 L<Moose> and lots of roles.
96
97 C<DBIx::Class::DeploymentHandler> itself is just a recommended set of roles
98 that we think will not only work well for everyone, but will also yeild the
99 best overall mileage.  Each role it uses has it's own nuances and
100 documentation, so I won't describe all of them here, but here are a few of the
101 major benefits over how L<DBIx::Class::Schema::Versioned> worked (and
102 L<DBIx::Class::DeploymentHandler::Deprecated> tries to maintain compatibility
103 with):
104
105 =over
106
107 =item *
108
109 Downgrades in addition to upgrades.
110
111 =item *
112
113 Multiple sql files files per upgrade/downgrade/install.
114
115 =item *
116
117 Perl scripts allowed for upgrade/downgrade/install.
118
119 =item *
120
121 Just one set of files needed for upgrade, unlike before where one might need
122 to generate C<factorial(scalar @versions)>, which is just silly.
123
124 =item *
125
126 And much, much more!
127
128 =back
129
130 That's really just a taste of some of the differences.  Check out each role for
131 all the details.
132
133 =head1 WHERE IS ALL THE DOC?!
134
135 C<DBIx::Class::DeploymentHandler> extends
136 L<DBIx::Class::DeploymentHandler::Dad>, so that's probably the first place to
137 look when you are trying to figure out how everything works.
138
139 Next would be to look at all the roles that fill in the blanks that
140 L<DBIx::Class::DeploymentHandler::Dad> expects to be filled.  They would be
141 L<DBIx::Class::DeploymentHandler::WithSqltDeployMethod>,
142 L<DBIx::Class::DeploymentHandler::WithMonotonicVersions>,
143 L<DBIx::Class::DeploymentHandler::WithStandardVersionStorage>, and
144 L<DBIx::Class::DeploymentHandler::WithReasonableDefaults>.
145
146 =method prepare_version_storage_install
147
148  $dh->prepare_version_storage_install
149
150 Creates the needed C<.sql> file to install the version storage and not the rest
151 of the tables
152
153 =method prepare_install
154
155  $dh->prepare_install
156
157 First prepare all the tables to be installed and the prepare just the version
158 storage
159
160 =method install_version_storage
161
162  $dh->install_version_storage
163
164 Install the version storage and not the rest of the tables
165
166 =head1 THIS SUCKS
167
168 You started your project and weren't using C<DBIx::Class::DeploymentHandler>?
169 Lucky for you I had you in mind when I wrote this doc.
170
171 First off, you'll want to just install the C<version_storage>:
172
173  my $s = My::Schema->connect(...);
174  my $dh = DBIx::Class::DeploymentHandler({ schema => $s });
175
176  $dh->prepare_version_storage_install;
177  $dh->install_version_storage;
178
179 Then set your database version:
180
181  $dh->add_database_version({ version => $s->version });
182
183 Now you should be able to use C<DBIx::Class::DeploymentHandler> like normal!
184
185 =head1 DONATIONS
186
187 If you'd like to thank me for the work I've done on this module, don't give me
188 a donation. I spend a lot of free time creating free software, but I do it
189 because I love it.
190
191 Instead, consider donating to someone who might actually need it.  Obviously
192 you should do research when donating to a charity, so don't just take my word
193 on this.  I like Children's Survival Fund:
194 L<http://www.childrenssurvivalfund.org>, but there are a host of other
195 charities that can do much more good than I will with your money.