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1 | package SQL::Translator::Filter::Globals; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id$ |
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5 | # ------------------------------------------------------------------- |
6 | # Copyright (C) 2002-4 SQLFairy Authors |
7 | # |
8 | # This program is free software; you can redistribute it and/or |
9 | # modify it under the terms of the GNU General Public License as |
10 | # published by the Free Software Foundation; version 2. |
11 | # |
12 | # This program is distributed in the hope that it will be useful, but |
13 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | # General Public License for more details. |
16 | # |
17 | # You should have received a copy of the GNU General Public License |
18 | # along with this program; if not, write to the Free Software |
19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
20 | # 02111-1307 USA |
21 | # ------------------------------------------------------------------- |
22 | |
23 | =head1 NAME |
24 | |
25 | SQL::Translator::Filter::Globals - Add global fields and indices to all tables. |
26 | |
27 | =head1 SYNOPSIS |
28 | |
29 | # e.g. Add timestamp field to all tables. |
30 | use SQL::Translator; |
31 | |
32 | my $sqlt = SQL::Translator->new( |
33 | from => 'MySQL', |
34 | to => 'MySQL', |
35 | filters => [ |
36 | Globals => { |
37 | fields => [ |
38 | { |
39 | name => 'modified' |
40 | data_type => 'TIMESTAMP' |
41 | } |
42 | ], |
43 | indices => [ |
44 | { |
45 | fields => 'modifed', |
46 | }, |
47 | ] |
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48 | constraints => [ |
49 | { |
50 | } |
51 | ] |
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52 | }, |
53 | ], |
54 | ) || die "SQLFairy error : ".SQL::Translator->error; |
55 | my $sql = $sqlt->translate || die "SQLFairy error : ".$sqlt->error; |
56 | |
57 | =cut |
58 | |
59 | use strict; |
60 | use vars qw/$VERSION/; |
61 | $VERSION=0.1; |
62 | |
63 | sub filter { |
64 | my $schema = shift; |
65 | my %args = @_; |
66 | my $global_table = $args{global_table} ||= '_GLOBAL_'; |
67 | |
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68 | my (@global_fields, @global_indices, @global_constraints); |
69 | push @global_fields, @{ $args{fields} } if $args{fields}; |
70 | push @global_indices, @{ $args{indices} } if $args{indices}; |
71 | push @global_constraints, @{ $args{constraints} } if $args{constraints}; |
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72 | |
73 | # Pull fields and indices off global table and then remove it. |
74 | if ( my $gtbl = $schema->get_table( $global_table ) ) { |
75 | |
76 | foreach ( $gtbl->get_fields ) { |
77 | # We don't copy the order attrib so the added fields should get |
78 | # pushed on the end of each table. |
79 | push @global_fields, { |
80 | name => $_->name, |
81 | comments => "".$_->comments, |
82 | data_type => $_->data_type, |
83 | default_value => $_->default_value, |
84 | size => [$_->size], |
85 | extra => scalar($_->extra), |
86 | foreign_key_reference => $_->foreign_key_reference, |
87 | is_auto_increment => $_->is_auto_increment, |
88 | is_foreign_key => $_->is_foreign_key, |
89 | is_nullable => $_->is_nullable, |
90 | is_primary_key => $_->is_primary_key, |
91 | is_unique => $_->is_unique, |
92 | is_valid => $_->is_valid, |
93 | }; |
94 | } |
95 | |
96 | foreach ( $gtbl->get_indices ) { |
97 | push @global_indices, { |
98 | name => $_->name, |
99 | type => $_->type, |
100 | fields => [$_->fields], |
101 | options => [$_->options], |
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102 | extra => scalar($_->extra), |
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103 | }; |
104 | } |
105 | |
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106 | foreach ( $gtbl->get_constraints ) { |
107 | push @global_constraints, { |
108 | name => $_->name, |
109 | fields => [$_->fields], |
110 | deferrable => $_->deferrable, |
111 | expression => $_->expression, |
112 | match_type => $_->match_type, |
113 | options => [$_->options], |
114 | on_delete => $_->on_delete, |
115 | on_update => $_->on_update, |
116 | reference_fields => [$_->reference_fields], |
117 | reference_table => $_->reference_table, |
118 | table => $_->table, |
119 | type => $_->type, |
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120 | extra => scalar($_->extra), |
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121 | }; |
122 | } |
123 | |
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124 | $schema->drop_table($gtbl); |
125 | } |
126 | |
127 | # Add globalis to tables |
128 | foreach my $tbl ( $schema->get_tables ) { |
129 | |
130 | foreach my $new_fld ( @global_fields ) { |
131 | # Don't add if field already there |
132 | next if $tbl->get_field( $new_fld->{name} ); |
133 | $tbl->add_field( %$new_fld ); |
134 | } |
135 | |
136 | foreach my $new_index ( @global_indices ) { |
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137 | $tbl->add_index( %$new_index ); |
138 | } |
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139 | |
140 | foreach my $new_constraint ( @global_constraints ) { |
141 | $tbl->add_constraint( %$new_constraint ); |
142 | } |
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143 | } |
144 | } |
145 | |
146 | 1; |
147 | |
148 | __END__ |
149 | |
150 | =head1 DESCRIPTION |
151 | |
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152 | Adds global fields, indices and constraints to all tables in the schema. |
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153 | The globals to add can either be defined in the filter args or using a _GLOBAL_ |
154 | table (see below). |
155 | |
156 | If a table already contains a field with the same name as a global then it is |
157 | skipped for that table. |
158 | |
159 | =head2 The _GLOBAL_ Table |
160 | |
161 | An alternative to using the args is to add a table called C<_GLOBAL_> to the |
162 | schema and then just use the filter. Any fields and indices defined on this table |
163 | will be added to all the tables in the schema and the _GLOBAL_ table removed. |
164 | |
165 | The name of the global can be changed using a C<global_table> arg to the |
166 | filter. |
167 | |
168 | =head1 SEE ALSO |
169 | |
170 | L<perl(1)>, L<SQL::Translator> |
171 | |
172 | =head1 BUGS |
173 | |
174 | Will generate duplicate indices if an index already exists on a table the same |
175 | as one added globally. |
176 | |
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177 | Will generate duplicate constraints if a constraint already exists on a table |
178 | the same as one added globally. |
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179 | |
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180 | =head1 TODO |
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181 | |
182 | Some extra data values that can be used to control the global addition. e.g. |
183 | 'skip_global'. |
184 | |
185 | =head1 AUTHOR |
186 | |
187 | Mark Addison <grommit@users.sourceforge.net> |
188 | |
189 | =cut |