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1 | package DBIx::Class::DeploymentHandler::Dad; |
2 | |
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3 | # ABSTRACT: Parent class for DeploymentHandlers |
4 | |
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5 | use Moose; |
6 | use Method::Signatures::Simple; |
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7 | require DBIx::Class::Schema; # loaded for type constraint |
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8 | use Carp::Clan '^DBIx::Class::DeploymentHandler'; |
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9 | use DBIx::Class::DeploymentHandler::Logger; |
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10 | use Log::Contextual ':log', -package_logger => |
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11 | DBIx::Class::DeploymentHandler::Logger->new({ |
12 | env_prefix => 'DBICDH' |
13 | }); |
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14 | |
15 | has schema => ( |
16 | isa => 'DBIx::Class::Schema', |
17 | is => 'ro', |
18 | required => 1, |
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19 | ); |
20 | |
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21 | has backup_directory => ( |
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22 | isa => 'Str', |
23 | is => 'ro', |
24 | predicate => 'has_backup_directory', |
25 | ); |
26 | |
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27 | has to_version => ( |
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28 | is => 'ro', |
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29 | isa => 'Str', |
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30 | lazy_build => 1, |
31 | ); |
32 | |
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33 | sub _build_to_version { $_[0]->schema_version } |
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34 | |
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35 | has schema_version => ( |
36 | is => 'ro', |
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37 | isa => 'Str', |
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38 | lazy_build => 1, |
39 | ); |
40 | |
41 | sub _build_schema_version { $_[0]->schema->schema_version } |
42 | |
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43 | method install { |
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44 | log_info { 'installing version ' . $self->to_version }; |
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45 | croak 'Install not possible as versions table already exists in database' |
46 | if $self->version_storage_is_installed; |
47 | |
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48 | my $ddl = $self->deploy; |
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49 | |
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50 | $self->add_database_version({ |
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51 | version => $self->to_version, |
52 | ddl => $ddl, |
53 | }); |
54 | } |
55 | |
56 | sub upgrade { |
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57 | log_info { 'upgrading' }; |
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58 | my $self = shift; |
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59 | my $ran_once = 0; |
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60 | while ( my $version_list = $self->next_version_set ) { |
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61 | $ran_once = 1; |
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62 | my ($ddl, $upgrade_sql) = @{ |
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63 | $self->upgrade_single_step({ version_set => $version_list }) |
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64 | ||[]}; |
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65 | |
66 | $self->add_database_version({ |
67 | version => $version_list->[-1], |
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68 | ddl => $ddl, |
69 | upgrade_sql => $upgrade_sql, |
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70 | }); |
71 | } |
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72 | |
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73 | log_warn { 'no need to run upgrade' } unless $ran_once; |
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74 | } |
75 | |
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76 | sub downgrade { |
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77 | log_info { 'upgrading' }; |
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78 | my $self = shift; |
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79 | my $ran_once = 0; |
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80 | while ( my $version_list = $self->previous_version_set ) { |
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81 | $ran_once = 1; |
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82 | $self->downgrade_single_step({ version_set => $version_list }); |
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83 | |
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84 | # do we just delete a row here? I think so but not sure |
85 | $self->delete_database_version({ version => $version_list->[-1] }); |
86 | } |
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87 | log_warn { 'no version to run downgrade' } unless $ran_once; |
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88 | } |
89 | |
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90 | method backup { |
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91 | log_info { 'backing up' }; |
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92 | $self->storage->backup($self->backup_directory) |
93 | } |
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94 | |
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95 | __PACKAGE__->meta->make_immutable; |
96 | |
97 | 1; |
98 | |
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99 | # vim: ts=2 sw=2 expandtab |
100 | |
101 | __END__ |
102 | |
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103 | =pod |
104 | |
105 | =attr schema |
106 | |
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107 | The L<DBIx::Class::Schema> (B<required>) that is used to talk to the database |
108 | and generate the DDL. |
109 | |
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110 | =attr schema_version |
111 | |
112 | The version that the schema is currently at. Defaults to |
113 | C<< $self->schema->schema_version >>. |
114 | |
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115 | =attr backup_directory |
116 | |
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117 | The directory where backups are stored |
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118 | |
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119 | =attr to_version |
120 | |
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121 | The version (defaults to schema's version) to migrate the database to |
122 | |
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123 | =method install |
124 | |
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125 | $dh->install |
126 | |
127 | Deploys the current schema into the database. Populates C<version_storage> with |
128 | C<version> and C<ddl>. |
129 | |
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130 | B<Note>: you typically need to call C<< $dh->prepare_deploy >> before you call |
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131 | this method. |
132 | |
133 | B<Note>: you cannot install on top of an already installed database |
134 | |
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135 | =method upgrade |
136 | |
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137 | $dh->upgrade |
138 | |
139 | Upgrades the database one step at a time till L</next_version_set> |
140 | returns C<undef>. Each upgrade step will add a C<version>, C<ddl>, and |
141 | C<upgrade_sql> to the version storage (if C<ddl> and/or C<upgrade_sql> are |
142 | returned from L</upgrade_single_step>. |
143 | |
144 | =method downgrade |
145 | |
146 | $dh->downgrade |
147 | |
148 | Downgrades the database one step at a time till L</previous_version_set> |
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149 | returns C<undef>. Each downgrade step will delete a C<version> from the |
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150 | version storage. |
151 | |
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152 | =method backup |
153 | |
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154 | $dh->backup |
155 | |
156 | Simply calls backup on the C<< $schema->storage >>, passing in |
157 | C<< $self->backup_directory >> as an argument. Please test yourself before |
158 | assuming it will work. |
159 | |
160 | =head1 METHODS THAT ARE REQUIRED IN SUBCLASSES |
161 | |
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162 | =head2 deploy |
163 | |
164 | See L<DBIx::Class::DeploymentHandler::HandlesDeploy/deploy>. |
165 | |
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166 | =head2 version_storage_is_installed |
167 | |
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168 | See L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/version_storage_is_installed>. |
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169 | |
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170 | =head2 add_database_version |
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171 | |
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172 | See L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/add_database_version>. |
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173 | |
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174 | =head2 delete_database_version |
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175 | |
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176 | See L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/delete_database_version>. |
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177 | |
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178 | =head2 next_version_set |
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179 | |
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180 | See L<DBIx::Class::DeploymentHandler::HandlesVersioning/next_version_set>. |
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181 | |
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182 | =head2 previous_version_set |
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183 | |
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184 | See L<DBIx::Class::DeploymentHandler::HandlesVersioning/previous_version_set>. |
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185 | |
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186 | =head2 upgrade_single_step |
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187 | |
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188 | See L<DBIx::Class::DeploymentHandler::HandlesDeploy/upgrade_single_step>. |
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189 | |
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190 | =head2 downgrade_single_step |
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191 | |
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192 | See L<DBIx::Class::DeploymentHandler::HandlesDeploy/downgrade_single_step>. |
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193 | |
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194 | =head1 ORTHODOX METHODS |
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195 | |
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196 | These methods are not actually B<required> as things will probably still work |
197 | if you don't implement them, but if you want your subclass to get along with |
198 | other subclasses (or more likely, tools made to use another subclass), you |
199 | should probably implement these too, even if they are no-ops. |
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200 | |
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201 | =head2 database_version |
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202 | |
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203 | see L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/database_version> |
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204 | |
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205 | =head2 prepare_deploy |
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206 | |
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207 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_deploy> |
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208 | |
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209 | =head2 prepare_resultsource_install |
210 | |
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211 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_resultsource_install> |
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212 | |
213 | =head2 install_resultsource |
214 | |
215 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/install_resultsource> |
216 | |
217 | =head2 prepare_upgrade |
218 | |
219 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_upgrade> |
220 | |
221 | =head2 prepare_downgrade |
222 | |
223 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_downgrade> |
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224 | |
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225 | =head2 SUBCLASSING |
226 | |
227 | All of the methods mentioned in L</METHODS THAT ARE REQUIRED IN SUBCLASSES> and |
228 | L</ORTHODOX METHODS> can be implemented in any fashion you choose. In the |
229 | spirit of code reuse I have used roles to implement them in my two subclasses, |
230 | L<DBIx::Class::DeploymentHandler> and |
231 | L<DBIx::Class::DeploymentHandler::Deprecated>, but you are free to implement |
232 | them entirely in a subclass if you so choose to. |
233 | |
234 | For in-depth documentation on how methods are supposed to work, see the roles |
235 | L<DBIx::Class::DeploymentHandler::HandlesDeploy>, |
236 | L<DBIx::Class::DeploymentHandler::HandlesVersioning>, and |
237 | L<DBIx::Class::DeploymentHandler::HandlesVersionStorage>. |
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238 | |