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