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1 | package # hide from PAUSE |
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2 | SQL::Translator::Parser::DBIx::Class; |
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3 | |
4 | # AUTHOR: Jess Robinson |
5 | |
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6 | # Some mistakes the fault of Matt S Trout |
7 | |
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8 | # Others the fault of Ash Berlin |
9 | |
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10 | use strict; |
11 | use warnings; |
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12 | use vars qw($DEBUG @EXPORT_OK); |
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13 | $DEBUG = 0 unless defined $DEBUG; |
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14 | |
15 | use Exporter; |
16 | use Data::Dumper; |
17 | use SQL::Translator::Utils qw(debug normalize_name); |
18 | |
19 | use base qw(Exporter); |
20 | |
21 | @EXPORT_OK = qw(parse); |
22 | |
23 | # ------------------------------------------------------------------- |
24 | # parse($tr, $data) |
25 | # |
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26 | # setting parser_args => { add_fk_index => 0 } will prevent |
27 | # the auto-generation of an index for each FK. |
28 | # |
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29 | # Note that $data, in the case of this parser, is not useful. |
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30 | # We're working with DBIx::Class Schemas, not data streams. |
31 | # ------------------------------------------------------------------- |
32 | sub parse { |
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33 | my ($tr, $data) = @_; |
34 | my $args = $tr->parser_args; |
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35 | my $dbicschema = $args->{'DBIx::Class::Schema'} || $args->{"DBIx::Schema"} ||$data; |
36 | $dbicschema ||= $args->{'package'}; |
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37 | my $limit_sources = $args->{'sources'}; |
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38 | |
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39 | die 'No DBIx::Class::Schema' unless ($dbicschema); |
40 | if (!ref $dbicschema) { |
41 | eval "use $dbicschema;"; |
42 | die "Can't load $dbicschema ($@)" if($@); |
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43 | } |
44 | |
45 | my $schema = $tr->schema; |
46 | my $table_no = 0; |
47 | |
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48 | $schema->name( ref($dbicschema) . " v" . ($dbicschema->VERSION || '1.x')) |
49 | unless ($schema->name); |
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50 | |
51 | my %seen_tables; |
52 | |
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53 | my @monikers = sort $dbicschema->sources; |
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54 | if ($limit_sources) { |
55 | my $ref = ref $limit_sources || ''; |
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56 | die "'sources' parameter must be an array or hash ref" unless $ref eq 'ARRAY' || ref eq 'HASH'; |
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57 | |
58 | # limit monikers to those specified in |
59 | my $sources; |
60 | if ($ref eq 'ARRAY') { |
61 | $sources->{$_} = 1 for (@$limit_sources); |
62 | } else { |
63 | $sources = $limit_sources; |
64 | } |
65 | @monikers = grep { $sources->{$_} } @monikers; |
66 | } |
67 | |
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68 | my(@table_monikers, @view_monikers); |
69 | for my $moniker (@monikers){ |
70 | my $source = $dbicschema->source($moniker); |
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71 | next if $source->is_virtual; |
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72 | if ( $source->isa('DBIx::Class::ResultSource::Table') ) { |
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73 | push(@table_monikers, $moniker); |
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74 | } elsif( $source->isa('DBIx::Class::ResultSource::View') ){ |
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75 | push(@view_monikers, $moniker); |
76 | } |
77 | } |
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78 | |
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79 | foreach my $moniker (sort @table_monikers) |
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80 | { |
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81 | my $source = $dbicschema->source($moniker); |
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82 | |
83 | # Skip custom query sources |
84 | next if ref($source->name); |
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85 | |
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86 | # Its possible to have multiple DBIC source using same table |
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87 | next if $seen_tables{$source->name}++; |
88 | |
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89 | my $table = $schema->add_table( |
90 | name => $source->name, |
91 | type => 'TABLE', |
92 | ) || die $schema->error; |
93 | my $colcount = 0; |
94 | foreach my $col ($source->columns) |
95 | { |
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96 | # assuming column_info in dbic is the same as DBI (?) |
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97 | # data_type is a number, column_type is text? |
98 | my %colinfo = ( |
99 | name => $col, |
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100 | size => 0, |
101 | is_auto_increment => 0, |
102 | is_foreign_key => 0, |
103 | is_nullable => 0, |
104 | %{$source->column_info($col)} |
105 | ); |
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106 | if ($colinfo{is_nullable}) { |
107 | $colinfo{default} = '' unless exists $colinfo{default}; |
108 | } |
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109 | my $f = $table->add_field(%colinfo) || die $table->error; |
110 | } |
111 | $table->primary_key($source->primary_columns); |
112 | |
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113 | my @primary = $source->primary_columns; |
114 | my %unique_constraints = $source->unique_constraints; |
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115 | foreach my $uniq (sort keys %unique_constraints) { |
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116 | if (!$source->compare_relationship_keys($unique_constraints{$uniq}, \@primary)) { |
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117 | $table->add_constraint( |
118 | type => 'unique', |
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119 | name => $uniq, |
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120 | fields => $unique_constraints{$uniq} |
121 | ); |
122 | } |
123 | } |
124 | |
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125 | my @rels = $source->relationships(); |
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126 | |
127 | my %created_FK_rels; |
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128 | |
129 | # global add_fk_index set in parser_args |
130 | my $add_fk_index = (exists $args->{add_fk_index} && ($args->{add_fk_index} == 0)) ? 0 : 1; |
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131 | |
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132 | foreach my $rel (sort @rels) |
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133 | { |
134 | my $rel_info = $source->relationship_info($rel); |
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135 | |
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136 | # Ignore any rel cond that isn't a straight hash |
137 | next unless ref $rel_info->{cond} eq 'HASH'; |
138 | |
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139 | my $othertable = $source->related_source($rel); |
140 | my $rel_table = $othertable->name; |
141 | |
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142 | my $reverse_rels = $source->reverse_relationship_info($rel); |
143 | my ($otherrelname, $otherrelationship) = each %{$reverse_rels}; |
144 | |
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145 | # Force the order of @cond to match the order of ->add_columns |
146 | my $idx; |
147 | my %other_columns_idx = map {'foreign.'.$_ => ++$idx } $othertable->columns; |
148 | my @cond = sort { $other_columns_idx{$a} cmp $other_columns_idx{$b} } keys(%{$rel_info->{cond}}); |
149 | |
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150 | # Get the key information, mapping off the foreign/self markers |
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151 | my @refkeys = map {/^\w+\.(\w+)$/} @cond; |
152 | my @keys = map {$rel_info->{cond}->{$_} =~ /^\w+\.(\w+)$/} @cond; |
153 | |
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154 | # determine if this relationship is a self.fk => foreign.pk (i.e. belongs_to) |
155 | my $fk_constraint; |
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156 | |
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157 | #first it can be specified explicitly |
158 | if ( exists $rel_info->{attrs}{is_foreign_key_constraint} ) { |
159 | $fk_constraint = $rel_info->{attrs}{is_foreign_key_constraint}; |
160 | } |
161 | # it can not be multi |
162 | elsif ( $rel_info->{attrs}{accessor} eq 'multi' ) { |
163 | $fk_constraint = 0; |
164 | } |
165 | # if indeed single, check if all self.columns are our primary keys. |
166 | # this is supposed to indicate a has_one/might_have... |
167 | # where's the introspection!!?? :) |
168 | else { |
169 | $fk_constraint = not $source->compare_relationship_keys(\@keys, \@primary); |
170 | } |
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171 | |
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172 | my $cascade; |
173 | for my $c (qw/delete update/) { |
174 | if (exists $rel_info->{attrs}{"on_$c"}) { |
175 | if ($fk_constraint) { |
176 | $cascade->{$c} = $rel_info->{attrs}{"on_$c"}; |
177 | } |
178 | else { |
179 | warn "SQLT attribute 'on_$c' was supplied for relationship '$moniker/$rel', which does not appear to be a foreign constraint. " |
180 | . "If you are sure that SQLT must generate a constraint for this relationship, add 'is_foreign_key_constraint => 1' to the attributes.\n"; |
181 | } |
182 | } |
183 | elsif (defined $otherrelationship and $otherrelationship->{attrs}{$c eq 'update' ? 'cascade_copy' : 'cascade_delete'}) { |
184 | $cascade->{$c} = 'CASCADE'; |
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185 | } |
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186 | } |
187 | |
188 | if($rel_table) |
189 | { |
190 | # Constraints are added only if applicable |
191 | next unless $fk_constraint; |
192 | |
193 | # Make sure we dont create the same foreign key constraint twice |
194 | my $key_test = join("\x00", @keys); |
195 | next if $created_FK_rels{$rel_table}->{$key_test}; |
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196 | |
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197 | my $is_deferrable = $rel_info->{attrs}{is_deferrable}; |
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198 | |
199 | # global parser_args add_fk_index param can be overridden on the rel def |
200 | my $add_fk_index_rel = (exists $rel_info->{attrs}{add_fk_index}) ? $rel_info->{attrs}{add_fk_index} : $add_fk_index; |
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201 | |
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202 | |
203 | $created_FK_rels{$rel_table}->{$key_test} = 1; |
204 | if (scalar(@keys)) { |
205 | $table->add_constraint( |
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206 | type => 'foreign_key', |
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207 | name => join('_', $table->name, 'fk', @keys), |
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208 | fields => \@keys, |
209 | reference_fields => \@refkeys, |
210 | reference_table => $rel_table, |
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211 | on_delete => $cascade->{delete}, |
212 | on_update => $cascade->{update}, |
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213 | (defined $is_deferrable ? ( deferrable => $is_deferrable ) : ()), |
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214 | ); |
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215 | |
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216 | if ($add_fk_index_rel) { |
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217 | my $index = $table->add_index( |
218 | name => join('_', $table->name, 'idx', @keys), |
219 | fields => \@keys, |
220 | type => 'NORMAL', |
221 | ); |
222 | } |
223 | } |
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224 | } |
225 | } |
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226 | |
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227 | if ($source->result_class->can('sqlt_deploy_hook')) { |
228 | $source->result_class->sqlt_deploy_hook($table); |
229 | } |
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230 | } |
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231 | |
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232 | foreach my $moniker (sort @view_monikers) |
233 | { |
234 | my $source = $dbicschema->source($moniker); |
235 | # Skip custom query sources |
236 | next if ref($source->name); |
237 | |
238 | # Its possible to have multiple DBIC source using same table |
239 | next if $seen_tables{$source->name}++; |
240 | |
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241 | my $view = $schema->add_view( |
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242 | name => $source->name, |
243 | fields => [ $source->columns ], |
244 | ($source->view_definition ? $source->view_definition : ()) |
245 | ); |
246 | if ($source->result_class->can('sqlt_deploy_hook')) { |
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247 | $source->result_class->sqlt_deploy_hook($view); |
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248 | } |
249 | } |
250 | |
251 | |
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252 | if ($dbicschema->can('sqlt_deploy_hook')) { |
253 | $dbicschema->sqlt_deploy_hook($schema); |
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254 | } |
255 | |
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256 | return 1; |
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257 | } |
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258 | |
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259 | 1; |