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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; |
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6 | require DBIx::Class::Schema; # loaded for type constraint |
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7 | use Carp::Clan '^DBIx::Class::DeploymentHandler'; |
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8 | use DBIx::Class::DeploymentHandler::Logger; |
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9 | use DBIx::Class::DeploymentHandler::Types; |
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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 => 'StrSchemaVersion', |
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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 | sub install { |
44 | my $self = shift; |
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45 | log_info { 'installing version ' . $self->to_version }; |
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46 | croak 'Install not possible as versions table already exists in database' |
47 | if $self->version_storage_is_installed; |
48 | |
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49 | my $ddl = $self->deploy; |
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50 | |
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51 | $self->add_database_version({ |
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52 | version => $self->to_version, |
53 | ddl => $ddl, |
54 | }); |
55 | } |
56 | |
57 | sub upgrade { |
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58 | log_info { 'upgrading' }; |
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59 | my $self = shift; |
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60 | my $ran_once = 0; |
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61 | while ( my $version_list = $self->next_version_set ) { |
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62 | $ran_once = 1; |
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63 | my ($ddl, $upgrade_sql) = @{ |
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64 | $self->upgrade_single_step({ version_set => $version_list }) |
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65 | ||[]}; |
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66 | |
67 | $self->add_database_version({ |
68 | version => $version_list->[-1], |
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69 | ddl => $ddl, |
70 | upgrade_sql => $upgrade_sql, |
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71 | }); |
72 | } |
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73 | |
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74 | log_warn { 'no need to run upgrade' } unless $ran_once; |
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75 | } |
76 | |
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77 | sub downgrade { |
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78 | log_info { 'downgrading' }; |
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79 | my $self = shift; |
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80 | my $ran_once = 0; |
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81 | while ( my $version_list = $self->previous_version_set ) { |
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82 | $ran_once = 1; |
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83 | $self->downgrade_single_step({ version_set => $version_list }); |
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84 | |
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85 | # do we just delete a row here? I think so but not sure |
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86 | $self->delete_database_version({ version => $version_list->[0] }); |
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87 | } |
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88 | log_warn { 'no version to run downgrade' } unless $ran_once; |
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89 | } |
90 | |
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91 | sub backup { |
92 | my $self = shift; |
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93 | log_info { 'backing up' }; |
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94 | $self->schema->storage->backup($self->backup_directory) |
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95 | } |
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96 | |
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97 | __PACKAGE__->meta->make_immutable; |
98 | |
99 | 1; |
100 | |
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101 | # vim: ts=2 sw=2 expandtab |
102 | |
103 | __END__ |
104 | |
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105 | =pod |
106 | |
107 | =attr schema |
108 | |
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109 | The L<DBIx::Class::Schema> (B<required>) that is used to talk to the database |
110 | and generate the DDL. |
111 | |
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112 | =attr schema_version |
113 | |
114 | The version that the schema is currently at. Defaults to |
115 | C<< $self->schema->schema_version >>. |
116 | |
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117 | =attr backup_directory |
118 | |
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119 | The directory where backups are stored |
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120 | |
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121 | =attr to_version |
122 | |
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123 | The version (defaults to schema's version) to migrate the database to |
124 | |
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125 | =method install |
126 | |
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127 | $dh->install |
128 | |
129 | Deploys the current schema into the database. Populates C<version_storage> with |
130 | C<version> and C<ddl>. |
131 | |
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132 | B<Note>: you typically need to call C<< $dh->prepare_deploy >> before you call |
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133 | this method. |
134 | |
135 | B<Note>: you cannot install on top of an already installed database |
136 | |
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137 | =method upgrade |
138 | |
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139 | $dh->upgrade |
140 | |
141 | Upgrades the database one step at a time till L</next_version_set> |
142 | returns C<undef>. Each upgrade step will add a C<version>, C<ddl>, and |
143 | C<upgrade_sql> to the version storage (if C<ddl> and/or C<upgrade_sql> are |
144 | returned from L</upgrade_single_step>. |
145 | |
146 | =method downgrade |
147 | |
148 | $dh->downgrade |
149 | |
150 | Downgrades the database one step at a time till L</previous_version_set> |
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151 | returns C<undef>. Each downgrade step will delete a C<version> from the |
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152 | version storage. |
153 | |
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154 | =method backup |
155 | |
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156 | $dh->backup |
157 | |
158 | Simply calls backup on the C<< $schema->storage >>, passing in |
159 | C<< $self->backup_directory >> as an argument. Please test yourself before |
160 | assuming it will work. |
161 | |
162 | =head1 METHODS THAT ARE REQUIRED IN SUBCLASSES |
163 | |
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164 | =head2 deploy |
165 | |
166 | See L<DBIx::Class::DeploymentHandler::HandlesDeploy/deploy>. |
167 | |
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168 | =head2 version_storage_is_installed |
169 | |
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170 | See L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/version_storage_is_installed>. |
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171 | |
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172 | =head2 add_database_version |
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173 | |
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174 | See L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/add_database_version>. |
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175 | |
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176 | =head2 delete_database_version |
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177 | |
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178 | See L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/delete_database_version>. |
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179 | |
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180 | =head2 next_version_set |
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181 | |
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182 | See L<DBIx::Class::DeploymentHandler::HandlesVersioning/next_version_set>. |
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183 | |
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184 | =head2 previous_version_set |
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185 | |
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186 | See L<DBIx::Class::DeploymentHandler::HandlesVersioning/previous_version_set>. |
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187 | |
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188 | =head2 upgrade_single_step |
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189 | |
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190 | See L<DBIx::Class::DeploymentHandler::HandlesDeploy/upgrade_single_step>. |
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191 | |
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192 | =head2 downgrade_single_step |
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193 | |
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194 | See L<DBIx::Class::DeploymentHandler::HandlesDeploy/downgrade_single_step>. |
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195 | |
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196 | =head1 ORTHODOX METHODS |
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197 | |
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198 | These methods are not actually B<required> as things will probably still work |
199 | if you don't implement them, but if you want your subclass to get along with |
200 | other subclasses (or more likely, tools made to use another subclass), you |
201 | should probably implement these too, even if they are no-ops. |
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202 | |
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203 | =head2 database_version |
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204 | |
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205 | see L<DBIx::Class::DeploymentHandler::HandlesVersionStorage/database_version> |
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206 | |
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207 | =head2 prepare_deploy |
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208 | |
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209 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_deploy> |
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210 | |
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211 | =head2 prepare_resultsource_install |
212 | |
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213 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_resultsource_install> |
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214 | |
215 | =head2 install_resultsource |
216 | |
217 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/install_resultsource> |
218 | |
219 | =head2 prepare_upgrade |
220 | |
221 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_upgrade> |
222 | |
223 | =head2 prepare_downgrade |
224 | |
225 | see L<DBIx::Class::DeploymentHandler::HandlesDeploy/prepare_downgrade> |
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226 | |
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227 | =head2 SUBCLASSING |
228 | |
229 | All of the methods mentioned in L</METHODS THAT ARE REQUIRED IN SUBCLASSES> and |
230 | L</ORTHODOX METHODS> can be implemented in any fashion you choose. In the |
231 | spirit of code reuse I have used roles to implement them in my two subclasses, |
232 | L<DBIx::Class::DeploymentHandler> and |
233 | L<DBIx::Class::DeploymentHandler::Deprecated>, but you are free to implement |
234 | them entirely in a subclass if you so choose to. |
235 | |
236 | For in-depth documentation on how methods are supposed to work, see the roles |
237 | L<DBIx::Class::DeploymentHandler::HandlesDeploy>, |
238 | L<DBIx::Class::DeploymentHandler::HandlesVersioning>, and |
239 | L<DBIx::Class::DeploymentHandler::HandlesVersionStorage>. |
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240 | |