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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 | |
10 | has schema => ( |
11 | isa => 'DBIx::Class::Schema', |
12 | is => 'ro', |
13 | required => 1, |
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14 | handles => [qw{schema_version}], |
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15 | ); |
16 | |
17 | has upgrade_directory => ( |
18 | isa => 'Str', |
19 | is => 'ro', |
20 | required => 1, |
21 | default => 'sql', |
22 | ); |
23 | |
24 | has backup_directory => ( |
25 | isa => 'Str', |
26 | is => 'ro', |
27 | ); |
28 | |
29 | has storage => ( |
30 | isa => 'DBIx::Class::Storage', |
31 | is => 'ro', |
32 | lazy_build => 1, |
33 | ); |
34 | |
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35 | method _build_storage { |
36 | my $s = $self->schema->storage; |
37 | $s->_determine_driver; |
38 | $s |
39 | } |
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40 | |
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41 | has _filedata => ( |
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42 | isa => 'Str', |
43 | is => 'rw', |
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44 | ); |
45 | |
46 | has do_backup => ( |
47 | isa => 'Bool', |
48 | is => 'ro', |
49 | default => undef, |
50 | ); |
51 | |
52 | has do_diff_on_init => ( |
53 | isa => 'Bool', |
54 | is => 'ro', |
55 | default => undef, |
56 | ); |
57 | |
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58 | has version_rs => ( |
59 | isa => 'DBIx::Class::ResultSet', |
60 | is => 'ro', |
61 | lazy_build => 1, |
62 | handles => [qw( is_installed db_version )], |
63 | ); |
64 | |
65 | method _build_version_rs { $self->schema->resultset('VersionResult') } |
66 | |
67 | method backup { $self->storage->backup($self->backup_directory) } |
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68 | |
69 | method install($new_version) { |
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70 | carp 'Install not possible as versions table already exists in database' |
71 | unless $self->is_installed; |
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72 | |
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73 | $new_version ||= $self->schema_version; |
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74 | |
75 | if ($new_version) { |
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76 | $self->schema->deploy; |
77 | |
78 | $self->version_rs->create({ |
79 | version => $new_version, |
80 | # ddl => $ddl, |
81 | # upgrade_sql => $upgrade_sql, |
82 | }); |
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83 | } |
84 | } |
85 | |
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86 | method create_upgrade_path { } |
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87 | |
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88 | method ordered_schema_versions { } |
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89 | |
90 | method upgrade { |
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91 | my $db_version = $self->db_version; |
92 | my $schema_version = $self->schema_version; |
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93 | |
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94 | unless ($db_version) { |
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95 | # croak? |
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96 | carp 'Upgrade not possible as database is unversioned. Please call install first.'; |
97 | return; |
98 | } |
99 | |
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100 | if ( $db_version eq $schema_version ) { |
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101 | # croak? |
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102 | carp "Upgrade not necessary\n"; |
103 | return; |
104 | } |
105 | |
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106 | my @version_list = $self->ordered_schema_versions || |
107 | ( $db_version, $schema_version ); |
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108 | |
109 | # remove all versions in list above the required version |
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110 | while ( @version_list && ( $version_list[-1] ne $schema_version ) ) { |
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111 | pop @version_list; |
112 | } |
113 | |
114 | # remove all versions in list below the current version |
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115 | while ( @version_list && ( $version_list[0] ne $db_version ) ) { |
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116 | shift @version_list; |
117 | } |
118 | |
119 | # check we have an appropriate list of versions |
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120 | die if @version_list < 2; |
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121 | |
122 | # do sets of upgrade |
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123 | while ( @version_list >= 2 ) { |
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124 | $self->upgrade_single_step( $version_list[0], $version_list[1] ); |
125 | shift @version_list; |
126 | } |
127 | } |
128 | |
129 | method upgrade_single_step($db_version, $target_version) { |
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130 | if ($db_version eq $target_version) { |
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131 | # croak? |
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132 | carp "Upgrade not necessary\n"; |
133 | return; |
134 | } |
135 | |
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136 | my $upgrade_file = $self->ddl_filename( |
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137 | $self->storage->sqlt_type, |
138 | $target_version, |
139 | $self->upgrade_directory, |
140 | $db_version, |
141 | ); |
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142 | |
143 | $self->create_upgrade_path({ upgrade_file => $upgrade_file }); |
144 | |
145 | unless (-f $upgrade_file) { |
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146 | # croak? |
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147 | carp "Upgrade not possible, no upgrade file found ($upgrade_file), please create one\n"; |
148 | return; |
149 | } |
150 | |
151 | carp "DB version ($db_version) is lower than the schema version (".$self->schema_version."). Attempting upgrade.\n"; |
152 | |
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153 | $self->_filedata($self->_read_sql_file($upgrade_file)); # I don't like this --fREW 2010-02-22 |
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154 | $self->backup if $self->do_backup; |
155 | $self->schema->txn_do(sub { $self->do_upgrade }); |
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156 | |
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157 | $self->version_rs->create({ |
158 | version => $target_version, |
159 | # ddl => $ddl, |
160 | # upgrade_sql => $upgrade_sql, |
161 | }); |
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162 | } |
163 | |
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164 | method do_upgrade { $self->run_upgrade(qr/.*?/) } |
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165 | |
166 | method run_upgrade($stm) { |
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167 | return unless $self->_filedata; |
168 | my @statements = grep { $_ =~ $stm } @{$self->_filedata}; |
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169 | |
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170 | for (@statements) { |
171 | $self->storage->debugobj->query_start($_) if $self->storage->debug; |
172 | $self->apply_statement($_); |
173 | $self->storage->debugobj->query_end($_) if $self->storage->debug; |
174 | } |
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175 | } |
176 | |
177 | method apply_statement($statement) { |
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178 | # croak? |
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179 | $self->storage->dbh->do($_) or carp "SQL was: $_" |
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180 | } |
181 | |
182 | sub _create_db_to_schema_diff { |
183 | my $self = shift; |
184 | |
185 | my %driver_to_db_map = ( |
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186 | 'mysql' => 'MySQL' |
187 | ); |
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188 | |
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189 | my $db = $driver_to_db_map{$self->storage->dbh->{Driver}{Name}}; |
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190 | unless ($db) { |
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191 | # croak? |
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192 | print "Sorry, this is an unsupported DB\n"; |
193 | return; |
194 | } |
195 | |
196 | $self->throw_exception($self->storage->_sqlt_version_error) |
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197 | unless $self->storage->_sqlt_version_ok; |
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198 | |
199 | my $db_tr = SQL::Translator->new({ |
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200 | add_drop_table => 1, |
201 | parser => 'DBI', |
202 | parser_args => { dbh => $self->storage->dbh }, |
203 | producer => $db, |
204 | }); |
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205 | |
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206 | my $dbic_tr = SQL::Translator->new({ |
207 | parser => 'SQL::Translator::Parser::DBIx::Class', |
208 | data => $self, |
209 | producer => $db, |
210 | }); |
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211 | |
212 | $db_tr->schema->name('db_schema'); |
213 | $dbic_tr->schema->name('dbic_schema'); |
214 | |
215 | # is this really necessary? |
216 | foreach my $tr ($db_tr, $dbic_tr) { |
217 | my $data = $tr->data; |
218 | $tr->parser->($tr, $$data); |
219 | } |
220 | |
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221 | my $diff = SQL::Translator::Diff::schema_diff( |
222 | $db_tr->schema, $db, |
223 | $dbic_tr->schema, $db, { |
224 | ignore_constraint_names => 1, |
225 | ignore_index_names => 1, |
226 | caseopt => 1, |
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227 | } |
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228 | ); |
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229 | |
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230 | my $filename = $self->ddl_filename( |
231 | $db, |
232 | $self->schema_version, |
233 | $self->upgrade_directory, |
234 | 'PRE', |
235 | ); |
236 | |
237 | open my $file, '>', $filename |
238 | or $self->throw_exception("Can't open $filename for writing ($!)"); |
239 | print {$file} $diff; |
240 | close $file; |
241 | |
242 | carp "WARNING: There may be differences between your DB and your DBIC schema.\n" . |
243 | "Please review and if necessary run the SQL in $filename to sync your DB.\n"; |
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244 | } |
245 | |
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246 | method _read_sql_file($file) { |
247 | return unless $file; |
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248 | |
249 | open my $fh, '<', $file or carp("Can't open upgrade file, $file ($!)"); |
250 | my @data = split /\n/, join '', <$fh>; |
251 | close $fh; |
252 | |
253 | @data = grep { |
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254 | $_ && |
255 | !/^--/ && |
256 | !/^(BEGIN|BEGIN TRANSACTION|COMMIT)/m |
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257 | } split /;/, |
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258 | join '', @data; |
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259 | |
260 | return \@data; |
261 | } |
262 | |
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263 | 1; |