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1 | package DBIx::Class::DeploymentHandler; |
2 | |
3 | use Moose; |
4 | use Method::Signatures::Simple; |
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5 | require DBIx::Class::Schema; # loaded for type constraint |
6 | require DBIx::Class::Storage; # loaded for type constraint |
7 | require DBIx::Class::ResultSet; # loaded for type constraint |
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8 | use Carp::Clan '^DBIx::Class::DeploymentHandler'; |
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9 | use SQL::Translator; |
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10 | |
11 | has schema => ( |
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12 | isa => 'DBIx::Class::Schema', |
13 | is => 'ro', |
14 | required => 1, |
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15 | handles => [qw( ddl_filename schema_version )], |
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16 | ); |
17 | |
18 | has upgrade_directory => ( |
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19 | isa => 'Str', |
20 | is => 'ro', |
21 | required => 1, |
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22 | default => 'sql', |
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23 | ); |
24 | |
25 | has backup_directory => ( |
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26 | isa => 'Str', |
27 | is => 'ro', |
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28 | ); |
29 | |
30 | has storage => ( |
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31 | isa => 'DBIx::Class::Storage', |
32 | is => 'ro', |
33 | lazy_build => 1, |
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34 | ); |
35 | |
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36 | method _build_storage { |
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37 | my $s = $self->schema->storage; |
38 | $s->_determine_driver; |
39 | $s |
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40 | } |
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41 | |
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42 | has _filedata => ( |
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43 | isa => 'ArrayRef[Str]', |
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44 | is => 'rw', |
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45 | ); |
46 | |
47 | has do_backup => ( |
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48 | isa => 'Bool', |
49 | is => 'ro', |
50 | default => undef, |
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51 | ); |
52 | |
53 | has do_diff_on_init => ( |
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54 | isa => 'Bool', |
55 | is => 'ro', |
56 | default => undef, |
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57 | ); |
58 | |
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59 | has version_rs => ( |
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60 | isa => 'DBIx::Class::ResultSet', |
61 | is => 'ro', |
62 | lazy_build => 1, |
63 | handles => [qw( is_installed db_version )], |
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64 | ); |
65 | |
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66 | has databases => ( |
67 | # make this coerce from Str |
68 | isa => 'ArrayRef[Str]', |
69 | is => 'ro', |
70 | default => sub { [qw( MySQL SQLite PostgreSQL )] }, |
71 | ); |
72 | |
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73 | has sqltargs => ( |
74 | isa => 'HashRef', |
75 | is => 'ro', |
76 | default => sub { {} }, |
77 | ); |
78 | |
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79 | method _build_version_rs { |
80 | $self->schema->set_us_up_the_bomb; |
81 | $self->schema->resultset('__VERSION') |
82 | } |
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83 | |
84 | method backup { $self->storage->backup($self->backup_directory) } |
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85 | |
86 | method install($new_version) { |
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87 | carp 'Install not possible as versions table already exists in database' |
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88 | if $self->is_installed; |
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89 | |
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90 | $new_version ||= $self->schema_version; |
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91 | |
92 | if ($new_version) { |
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93 | $self->schema->deploy; |
94 | |
95 | $self->version_rs->create({ |
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96 | version => $new_version, |
97 | # ddl => $ddl, |
98 | # upgrade_sql => $upgrade_sql, |
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99 | }); |
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100 | } |
101 | } |
102 | |
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103 | method create_upgrade_path { } |
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104 | |
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105 | method ordered_schema_versions { undef } |
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106 | |
107 | method upgrade { |
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108 | my $db_version = $self->db_version; |
109 | my $schema_version = $self->schema_version; |
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110 | |
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111 | unless ($db_version) { |
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112 | # croak? |
113 | carp 'Upgrade not possible as database is unversioned. Please call install first.'; |
114 | return; |
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115 | } |
116 | |
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117 | if ( $db_version eq $schema_version ) { |
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118 | # croak? |
119 | carp "Upgrade not necessary\n"; |
120 | return; |
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121 | } |
122 | |
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123 | my @version_list = $self->ordered_schema_versions || |
124 | ( $db_version, $schema_version ); |
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125 | |
126 | # remove all versions in list above the required version |
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127 | while ( @version_list && ( $version_list[-1] ne $schema_version ) ) { |
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128 | pop @version_list; |
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129 | } |
130 | |
131 | # remove all versions in list below the current version |
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132 | while ( @version_list && ( $version_list[0] ne $db_version ) ) { |
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133 | shift @version_list; |
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134 | } |
135 | |
136 | # check we have an appropriate list of versions |
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137 | die if @version_list < 2; |
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138 | |
139 | # do sets of upgrade |
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140 | while ( @version_list >= 2 ) { |
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141 | $self->upgrade_single_step( $version_list[0], $version_list[1] ); |
142 | shift @version_list; |
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143 | } |
144 | } |
145 | |
146 | method upgrade_single_step($db_version, $target_version) { |
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147 | if ($db_version eq $target_version) { |
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148 | # croak? |
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149 | carp "Upgrade not necessary\n"; |
150 | return; |
151 | } |
152 | |
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153 | my $upgrade_file = $self->ddl_filename( |
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154 | $self->storage->sqlt_type, |
155 | $target_version, |
156 | $self->upgrade_directory, |
157 | $db_version, |
158 | ); |
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159 | |
160 | $self->create_upgrade_path({ upgrade_file => $upgrade_file }); |
161 | |
162 | unless (-f $upgrade_file) { |
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163 | # croak? |
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164 | carp "Upgrade not possible, no upgrade file found ($upgrade_file), please create one\n"; |
165 | return; |
166 | } |
167 | |
168 | carp "DB version ($db_version) is lower than the schema version (".$self->schema_version."). Attempting upgrade.\n"; |
169 | |
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170 | $self->_filedata($self->_read_sql_file($upgrade_file)); # I don't like this --fREW 2010-02-22 |
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171 | $self->backup if $self->do_backup; |
172 | $self->schema->txn_do(sub { $self->do_upgrade }); |
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173 | |
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174 | $self->version_rs->create({ |
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175 | version => $target_version, |
176 | # ddl => $ddl, |
177 | # upgrade_sql => $upgrade_sql, |
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178 | }); |
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179 | } |
180 | |
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181 | method create_ddl_dir($version, $preversion) { |
182 | my $schema = $self->schema; |
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183 | my $databases = $self->databases; |
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184 | my $dir = $self->upgrade_directory; |
185 | my $sqltargs = $self->sqltargs; |
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186 | unless( -d $dir ) { |
187 | carp "Upgrade directory $dir does not exist, using ./\n"; |
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188 | $dir = "./"; |
189 | } |
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190 | |
191 | my $schema_version = $schema->schema_version || '1.x'; |
192 | $version ||= $schema_version; |
193 | |
194 | $sqltargs = { |
195 | add_drop_table => 1, |
196 | ignore_constraint_names => 1, |
197 | ignore_index_names => 1, |
198 | %{$sqltargs || {}} |
199 | }; |
200 | |
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201 | my $sqlt = SQL::Translator->new( $sqltargs ); |
202 | |
203 | $sqlt->parser('SQL::Translator::Parser::DBIx::Class'); |
204 | my $sqlt_schema = $sqlt->translate({ data => $schema }) |
205 | or $self->throw_exception ($sqlt->error); |
206 | |
207 | foreach my $db (@$databases) { |
208 | $sqlt->reset(); |
209 | $sqlt->{schema} = $sqlt_schema; |
210 | $sqlt->producer($db); |
211 | |
212 | my $file; |
213 | my $filename = $schema->ddl_filename($db, $version, $dir); |
214 | if (-e $filename && ($version eq $schema_version )) { |
215 | # if we are dumping the current version, overwrite the DDL |
216 | carp "Overwriting existing DDL file - $filename"; |
217 | unlink($filename); |
218 | } |
219 | |
220 | my $output = $sqlt->translate; |
221 | if(!$output) { |
222 | carp("Failed to translate to $db, skipping. (" . $sqlt->error . ")"); |
223 | next; |
224 | } |
225 | if(!open($file, ">$filename")) { |
226 | $self->throw_exception("Can't open $filename for writing ($!)"); |
227 | next; |
228 | } |
229 | print $file $output; |
230 | close($file); |
231 | |
232 | next unless ($preversion); |
233 | |
234 | require SQL::Translator::Diff; |
235 | |
236 | my $prefilename = $schema->ddl_filename($db, $preversion, $dir); |
237 | if(!-e $prefilename) { |
238 | carp("No previous schema file found ($prefilename)"); |
239 | next; |
240 | } |
241 | |
242 | my $difffile = $schema->ddl_filename($db, $version, $dir, $preversion); |
243 | if(-e $difffile) { |
244 | carp("Overwriting existing diff file - $difffile"); |
245 | unlink($difffile); |
246 | } |
247 | |
248 | my $source_schema; |
249 | { |
250 | my $t = SQL::Translator->new($sqltargs); |
251 | $t->debug( 0 ); |
252 | $t->trace( 0 ); |
253 | |
254 | $t->parser( $db ) |
255 | or $self->throw_exception ($t->error); |
256 | |
257 | my $out = $t->translate( $prefilename ) |
258 | or $self->throw_exception ($t->error); |
259 | |
260 | $source_schema = $t->schema; |
261 | |
262 | $source_schema->name( $prefilename ) |
263 | unless ( $source_schema->name ); |
264 | } |
265 | |
266 | # The "new" style of producers have sane normalization and can support |
267 | # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't |
268 | # And we have to diff parsed SQL against parsed SQL. |
269 | my $dest_schema = $sqlt_schema; |
270 | |
271 | unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) { |
272 | my $t = SQL::Translator->new($sqltargs); |
273 | $t->debug( 0 ); |
274 | $t->trace( 0 ); |
275 | |
276 | $t->parser( $db ) |
277 | or $self->throw_exception ($t->error); |
278 | |
279 | my $out = $t->translate( $filename ) |
280 | or $self->throw_exception ($t->error); |
281 | |
282 | $dest_schema = $t->schema; |
283 | |
284 | $dest_schema->name( $filename ) |
285 | unless $dest_schema->name; |
286 | } |
287 | |
288 | my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db, |
289 | $dest_schema, $db, |
290 | $sqltargs |
291 | ); |
292 | if(!open $file, ">$difffile") { |
293 | $self->throw_exception("Can't write to $difffile ($!)"); |
294 | next; |
295 | } |
296 | print $file $diff; |
297 | close($file); |
298 | } |
299 | } |
300 | |
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301 | method do_upgrade { $self->run_upgrade(qr/.*?/) } |
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302 | |
303 | method run_upgrade($stm) { |
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304 | return unless $self->_filedata; |
305 | my @statements = grep { $_ =~ $stm } @{$self->_filedata}; |
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306 | |
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307 | for (@statements) { |
308 | $self->storage->debugobj->query_start($_) if $self->storage->debug; |
309 | $self->apply_statement($_); |
310 | $self->storage->debugobj->query_end($_) if $self->storage->debug; |
311 | } |
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312 | } |
313 | |
314 | method apply_statement($statement) { |
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315 | # croak? |
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316 | $self->storage->dbh->do($_) or carp "SQL was: $_" |
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317 | } |
318 | |
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319 | method _read_sql_file($file) { |
320 | return unless $file; |
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321 | |
322 | open my $fh, '<', $file or carp("Can't open upgrade file, $file ($!)"); |
323 | my @data = split /\n/, join '', <$fh>; |
324 | close $fh; |
325 | |
326 | @data = grep { |
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327 | $_ && |
328 | !/^--/ && |
329 | !/^(BEGIN|BEGIN TRANSACTION|COMMIT)/m |
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330 | } split /;/, |
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331 | join '', @data; |
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332 | |
333 | return \@data; |
334 | } |
335 | |
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336 | 1; |
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337 | |
338 | __END__ |
339 | |
340 | vim: ts=2,sw=2,expandtab |