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1 | package Catalyst::Model::DBIC::Schema; |
2 | |
3 | use strict; |
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4 | use warnings; |
5 | |
6 | our $VERSION = '0.20'; |
7 | |
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8 | use base qw/Catalyst::Model Class::Accessor::Fast Class::Data::Accessor/; |
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9 | use NEXT; |
10 | use UNIVERSAL::require; |
11 | use Carp; |
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12 | use Data::Dumper; |
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13 | require DBIx::Class; |
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14 | |
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15 | __PACKAGE__->mk_classaccessor('composed_schema'); |
16 | __PACKAGE__->mk_accessors('schema'); |
17 | |
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18 | =head1 NAME |
19 | |
20 | Catalyst::Model::DBIC::Schema - DBIx::Class::Schema Model Class |
21 | |
22 | =head1 SYNOPSIS |
23 | |
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24 | Manual creation of a DBIx::Class::Schema and a Catalyst::Model::DBIC::Schema: |
25 | |
26 | =over |
27 | |
28 | =item 1. |
29 | |
30 | Create the DBIx:Class schema in MyApp/Schema/FilmDB.pm: |
31 | |
32 | package MyApp::Schema::FilmDB; |
33 | use base qw/DBIx::Class::Schema/; |
34 | |
35 | __PACKAGE__->load_classes(qw/Actor Role/); |
36 | |
37 | =item 2. |
38 | |
39 | Create some classes for the tables in the database, for example an |
40 | Actor in MyApp/Schema/FilmDB/Actor.pm: |
41 | |
42 | package MyApp::Schema::FilmDB::Actor; |
43 | use base qw/DBIx::Class/ |
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44 | |
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45 | __PACKAGE__->load_components(qw/Core/); |
46 | __PACKAGE__->table('actor'); |
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47 | |
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48 | ... |
49 | |
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50 | and a Role in MyApp/Schema/FilmDB/Role.pm: |
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51 | |
52 | package MyApp::Schema::FilmDB::Role; |
53 | use base qw/DBIx::Class/ |
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54 | |
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55 | __PACKAGE__->load_components(qw/Core/); |
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56 | __PACKAGE__->table('role'); |
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57 | |
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58 | ... |
59 | |
60 | Notice that the schema is in MyApp::Schema, not in MyApp::Model. This way it's |
61 | usable as a standalone module and you can test/run it without Catalyst. |
62 | |
63 | =item 3. |
64 | |
65 | To expose it to Catalyst as a model, you should create a DBIC Model in |
66 | MyApp/Model/FilmDB.pm: |
67 | |
68 | package MyApp::Model::FilmDB; |
69 | use base qw/Catalyst::Model::DBIC::Schema/; |
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70 | |
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71 | __PACKAGE__->config( |
72 | schema_class => 'MyApp::Schema::FilmDB', |
73 | connect_info => [ |
74 | "DBI:...", |
75 | "username", |
76 | "password", |
77 | {AutoCommit => 1} |
78 | ] |
79 | ); |
80 | |
81 | See below for a full list of the possible config parameters. |
82 | |
83 | =back |
84 | |
85 | Now you have a working Model, accessing your separate DBIC Schema. Which can |
86 | be used/accessed in the normal Catalyst manner, via $c->model(): |
87 | |
88 | my $actor = $c->model('FilmDB::Actor')->find(1); |
89 | |
90 | You can also use it to set up DBIC authentication with |
91 | Authentication::Store::DBIC in MyApp.pm: |
92 | |
93 | package MyApp; |
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94 | |
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95 | use Catalyst qw/... Authentication::Store::DBIC/; |
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96 | |
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97 | ... |
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98 | |
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99 | __PACKAGE__->config->{authentication}{dbic} = { |
100 | user_class => 'FilmDB::Actor', |
101 | user_field => 'name', |
102 | password_field => 'password' |
103 | } |
104 | |
105 | C<< $c->model() >> returns a L<DBIx::Class::ResultSet> for the source name |
106 | parameter passed. To find out more about which methods can be called on a |
107 | ResultSet, or how to add your own methods to it, please see the ResultSet |
108 | documentation in the L<DBIx::Class> distribution. |
109 | |
110 | Some examples are given below: |
111 | |
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112 | # to access schema methods directly: |
113 | $c->model('FilmDB')->schema->source(...); |
114 | |
115 | # to access the source object, resultset, and class: |
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116 | $c->model('FilmDB')->source(...); |
117 | $c->model('FilmDB')->resultset(...); |
118 | $c->model('FilmDB')->class(...); |
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119 | |
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120 | # For resultsets, there's an even quicker shortcut: |
121 | $c->model('FilmDB::Actor') |
122 | # is the same as $c->model('FilmDB')->resultset('Actor') |
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123 | |
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124 | # To get the composed schema for making new connections: |
125 | my $newconn = $c->model('FilmDB')->composed_schema->connect(...); |
126 | |
127 | # Or the same thing via a convenience shortcut: |
128 | my $newconn = $c->model('FilmDB')->connect(...); |
129 | |
130 | # or, if your schema works on different storage drivers: |
131 | my $newconn = $c->model('FilmDB')->composed_schema->clone(); |
132 | $newconn->storage_type('::LDAP'); |
133 | $newconn->connection(...); |
134 | |
135 | # and again, a convenience shortcut |
136 | my $newconn = $c->model('FilmDB')->clone(); |
137 | $newconn->storage_type('::LDAP'); |
138 | $newconn->connection(...); |
139 | |
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140 | =head1 DESCRIPTION |
141 | |
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142 | This is a Catalyst Model for L<DBIx::Class::Schema>-based Models. See |
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143 | the documentation for L<Catalyst::Helper::Model::DBIC::Schema> for |
144 | information on generating these Models via Helper scripts. |
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145 | |
146 | =head1 CONFIG PARAMETERS |
147 | |
148 | =over 4 |
149 | |
150 | =item schema_class |
151 | |
152 | This is the classname of your L<DBIx::Class::Schema> Schema. It needs |
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153 | to be findable in C<@INC>, but it does not need to be inside the |
154 | C<Catalyst::Model::> namespace. This parameter is required. |
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155 | |
156 | =item connect_info |
157 | |
158 | This is an arrayref of connection parameters, which are specific to your |
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159 | C<storage_type> (see your storage type documentation for more details). |
160 | If you only need one parameter (e.g. the DSN), you can just pass a string |
161 | instead of an arrayref. |
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162 | |
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163 | This is not required if C<schema_class> already has connection information |
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164 | defined inside itself (which isn't highly recommended, but can be done) |
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165 | |
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166 | For L<DBIx::Class::Storage::DBI>, which is the only supported |
167 | C<storage_type> in L<DBIx::Class> at the time of this writing, the |
168 | parameters are your dsn, username, password, and connect options hashref. |
169 | |
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170 | See L<DBIx::Class::Storage::DBI/connect_info> for a detailed explanation |
171 | of the arguments supported. |
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172 | |
173 | Examples: |
174 | |
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175 | connect_info => [ 'dbi:Pg:dbname=mypgdb', 'postgres', '' ], |
176 | |
177 | connect_info => [ |
178 | 'dbi:SQLite:dbname=foo.db', |
179 | { |
180 | on_connect_do => [ |
181 | 'PRAGMA synchronous = OFF', |
182 | ], |
183 | } |
184 | ], |
185 | |
186 | connect_info => [ |
187 | 'dbi:Pg:dbname=mypgdb', |
188 | 'postgres', |
189 | '', |
190 | { AutoCommit => 0 }, |
191 | { |
192 | on_connect_do => [ |
193 | 'some SQL statement', |
194 | 'another SQL statement', |
195 | ], |
196 | } |
197 | ], |
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198 | |
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199 | =item storage_type |
200 | |
201 | Allows the use of a different C<storage_type> than what is set in your |
202 | C<schema_class> (which in turn defaults to C<::DBI> if not set in current |
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203 | L<DBIx::Class>). Completely optional, and probably unnecessary for most |
204 | people until other storage backends become available for L<DBIx::Class>. |
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205 | |
206 | =back |
207 | |
208 | =head1 METHODS |
209 | |
210 | =over 4 |
211 | |
212 | =item new |
213 | |
214 | Instantiates the Model based on the above-documented ->config parameters. |
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215 | The only required parameter is C<schema_class>. C<connect_info> is |
216 | required in the case that C<schema_class> does not already have connection |
217 | information defined for it. |
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218 | |
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219 | =item schema |
220 | |
221 | Accessor which returns the connected schema being used by the this model. |
222 | There are direct shortcuts on the model class itself for |
223 | schema->resultset, schema->source, and schema->class. |
224 | |
225 | =item composed_schema |
226 | |
227 | Accessor which returns the composed schema, which has no connection info, |
228 | which was used in constructing the C<schema> above. Useful for creating |
229 | new connections based on the same schema/model. There are direct shortcuts |
230 | from the model object for composed_schema->clone and composed_schema->connect |
231 | |
232 | =item clone |
233 | |
234 | Shortcut for ->composed_schema->clone |
235 | |
236 | =item connect |
237 | |
238 | Shortcut for ->composed_schema->connect |
239 | |
240 | =item source |
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241 | |
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242 | Shortcut for ->schema->source |
243 | |
244 | =item class |
245 | |
246 | Shortcut for ->schema->class |
247 | |
248 | =item resultset |
249 | |
250 | Shortcut for ->schema->resultset |
251 | |
252 | =item storage |
253 | |
254 | Provides an accessor for the connected schema's storage object. |
255 | Used often for debugging and controlling transactions. |
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256 | |
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257 | =back |
258 | |
259 | =cut |
260 | |
261 | sub new { |
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262 | my $self = shift->NEXT::new(@_); |
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263 | |
264 | my $class = ref($self); |
265 | my $model_name = $class; |
266 | $model_name =~ s/^[\w:]+::(?:Model|M):://; |
267 | |
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268 | croak "->config->{schema_class} must be defined for this model" |
269 | unless $self->{schema_class}; |
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270 | |
271 | my $schema_class = $self->{schema_class}; |
272 | |
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273 | $schema_class->require |
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274 | or croak "Cannot load schema class '$schema_class': $@"; |
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275 | |
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276 | if( !$self->{connect_info} ) { |
277 | if($schema_class->storage && $schema_class->storage->connect_info) { |
278 | $self->{connect_info} = $schema_class->storage->connect_info; |
279 | } |
280 | else { |
281 | croak "Either ->config->{connect_info} must be defined for $class" |
282 | . " or $schema_class must have connect info defined on it" |
283 | . "Here's what we got:\n" |
284 | . Dumper($self); |
285 | } |
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286 | } |
287 | |
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288 | $self->composed_schema($schema_class->compose_namespace($class)); |
289 | $self->schema($self->composed_schema->clone); |
290 | |
291 | $self->schema->storage_type($self->{storage_type}) |
292 | if $self->{storage_type}; |
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293 | |
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294 | $self->schema->connection( |
295 | ref $self->{connect_info} eq 'ARRAY' ? |
296 | @{$self->{connect_info}} : |
297 | $self->{connect_info} |
298 | ); |
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299 | |
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300 | no strict 'refs'; |
301 | foreach my $moniker ($self->schema->sources) { |
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302 | my $classname = "${class}::$moniker"; |
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303 | *{"${classname}::ACCEPT_CONTEXT"} = sub { |
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304 | shift; |
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305 | shift->model($model_name)->resultset($moniker); |
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306 | } |
307 | } |
308 | |
309 | return $self; |
310 | } |
311 | |
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312 | sub clone { shift->composed_schema->clone(@_); } |
313 | |
314 | sub connect { shift->composed_schema->connect(@_); } |
315 | |
316 | sub storage { shift->schema->storage(@_); } |
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317 | |
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318 | =head1 SEE ALSO |
319 | |
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320 | General Catalyst Stuff: |
321 | |
322 | L<Catalyst::Manual>, L<Catalyst::Test>, L<Catalyst::Request>, |
323 | L<Catalyst::Response>, L<Catalyst::Helper>, L<Catalyst>, |
324 | |
325 | Stuff related to DBIC and this Model style: |
326 | |
327 | L<DBIx::Class>, L<DBIx::Class::Schema>, |
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328 | L<DBIx::Class::Schema::Loader>, L<Catalyst::Helper::Model::DBIC::Schema> |
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329 | |
330 | =head1 AUTHOR |
331 | |
332 | Brandon L Black, C<blblack@gmail.com> |
333 | |
334 | =head1 COPYRIGHT |
335 | |
336 | This program is free software, you can redistribute it and/or modify it |
337 | under the same terms as Perl itself. |
338 | |
339 | =cut |
340 | |
341 | 1; |