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1 | package Catalyst::Model::DBIC::Schema; |
2 | |
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3 | use Moose; |
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4 | use mro 'c3'; |
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5 | extends 'Catalyst::Model'; |
6 | with 'MooseX::Object::Pluggable'; |
7 | |
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8 | our $VERSION = '0.24'; |
9 | |
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10 | use Carp::Clan '^Catalyst::Model::DBIC::Schema'; |
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11 | use Data::Dumper; |
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12 | use DBIx::Class (); |
13 | use Scalar::Util 'reftype'; |
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14 | use MooseX::ClassAttribute; |
15 | use Moose::Autobox; |
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16 | |
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17 | use Catalyst::Model::DBIC::Schema::Types |
18 | qw/ConnectInfo SchemaClass CursorClass/; |
19 | |
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20 | use MooseX::Types::Moose qw/ArrayRef Str ClassName/; |
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21 | |
22 | use namespace::clean -except => 'meta'; |
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23 | |
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24 | =head1 NAME |
25 | |
26 | Catalyst::Model::DBIC::Schema - DBIx::Class::Schema Model Class |
27 | |
28 | =head1 SYNOPSIS |
29 | |
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30 | Manual creation of a DBIx::Class::Schema and a Catalyst::Model::DBIC::Schema: |
31 | |
32 | =over |
33 | |
34 | =item 1. |
35 | |
36 | Create the DBIx:Class schema in MyApp/Schema/FilmDB.pm: |
37 | |
38 | package MyApp::Schema::FilmDB; |
39 | use base qw/DBIx::Class::Schema/; |
40 | |
41 | __PACKAGE__->load_classes(qw/Actor Role/); |
42 | |
43 | =item 2. |
44 | |
45 | Create some classes for the tables in the database, for example an |
46 | Actor in MyApp/Schema/FilmDB/Actor.pm: |
47 | |
48 | package MyApp::Schema::FilmDB::Actor; |
49 | use base qw/DBIx::Class/ |
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50 | |
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51 | __PACKAGE__->load_components(qw/Core/); |
52 | __PACKAGE__->table('actor'); |
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53 | |
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54 | ... |
55 | |
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56 | and a Role in MyApp/Schema/FilmDB/Role.pm: |
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57 | |
58 | package MyApp::Schema::FilmDB::Role; |
59 | use base qw/DBIx::Class/ |
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60 | |
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61 | __PACKAGE__->load_components(qw/Core/); |
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62 | __PACKAGE__->table('role'); |
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63 | |
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64 | ... |
65 | |
66 | Notice that the schema is in MyApp::Schema, not in MyApp::Model. This way it's |
67 | usable as a standalone module and you can test/run it without Catalyst. |
68 | |
69 | =item 3. |
70 | |
71 | To expose it to Catalyst as a model, you should create a DBIC Model in |
72 | MyApp/Model/FilmDB.pm: |
73 | |
74 | package MyApp::Model::FilmDB; |
75 | use base qw/Catalyst::Model::DBIC::Schema/; |
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76 | |
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77 | __PACKAGE__->config( |
78 | schema_class => 'MyApp::Schema::FilmDB', |
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79 | connect_info => { |
80 | dsn => "DBI:...", |
81 | user => "username", |
82 | password => "password", |
83 | } |
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84 | ); |
85 | |
86 | See below for a full list of the possible config parameters. |
87 | |
88 | =back |
89 | |
6dec11b7 |
90 | Now you have a working Model which accesses your separate DBIC Schema. This can |
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91 | be used/accessed in the normal Catalyst manner, via $c->model(): |
92 | |
93 | my $actor = $c->model('FilmDB::Actor')->find(1); |
94 | |
95 | You can also use it to set up DBIC authentication with |
96 | Authentication::Store::DBIC in MyApp.pm: |
97 | |
98 | package MyApp; |
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99 | |
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100 | use Catalyst qw/... Authentication::Store::DBIC/; |
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101 | |
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102 | ... |
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103 | |
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104 | __PACKAGE__->config->{authentication}{dbic} = { |
105 | user_class => 'FilmDB::Actor', |
106 | user_field => 'name', |
107 | password_field => 'password' |
108 | } |
109 | |
d52bc376 |
110 | C<< $c->model('Schema::Source') >> returns a L<DBIx::Class::ResultSet> for |
111 | the source name parameter passed. To find out more about which methods can |
112 | be called on a ResultSet, or how to add your own methods to it, please see |
113 | the ResultSet documentation in the L<DBIx::Class> distribution. |
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114 | |
115 | Some examples are given below: |
116 | |
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117 | # to access schema methods directly: |
118 | $c->model('FilmDB')->schema->source(...); |
119 | |
120 | # to access the source object, resultset, and class: |
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121 | $c->model('FilmDB')->source(...); |
122 | $c->model('FilmDB')->resultset(...); |
123 | $c->model('FilmDB')->class(...); |
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124 | |
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125 | # For resultsets, there's an even quicker shortcut: |
126 | $c->model('FilmDB::Actor') |
127 | # is the same as $c->model('FilmDB')->resultset('Actor') |
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128 | |
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129 | # To get the composed schema for making new connections: |
130 | my $newconn = $c->model('FilmDB')->composed_schema->connect(...); |
131 | |
132 | # Or the same thing via a convenience shortcut: |
133 | my $newconn = $c->model('FilmDB')->connect(...); |
134 | |
135 | # or, if your schema works on different storage drivers: |
136 | my $newconn = $c->model('FilmDB')->composed_schema->clone(); |
137 | $newconn->storage_type('::LDAP'); |
138 | $newconn->connection(...); |
139 | |
140 | # and again, a convenience shortcut |
141 | my $newconn = $c->model('FilmDB')->clone(); |
142 | $newconn->storage_type('::LDAP'); |
143 | $newconn->connection(...); |
144 | |
ad91060a |
145 | =head1 DESCRIPTION |
146 | |
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147 | This is a Catalyst Model for L<DBIx::Class::Schema>-based Models. See |
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148 | the documentation for L<Catalyst::Helper::Model::DBIC::Schema> for |
149 | information on generating these Models via Helper scripts. |
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150 | |
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151 | When your Catalyst app starts up, a thin Model layer is created as an |
152 | interface to your DBIC Schema. It should be clearly noted that the model |
153 | object returned by C<< $c->model('FilmDB') >> is NOT itself a DBIC schema or |
154 | resultset object, but merely a wrapper proving L<methods|/METHODS> to access |
155 | the underlying schema. |
156 | |
157 | In addition to this model class, a shortcut class is generated for each |
158 | source in the schema, allowing easy and direct access to a resultset of the |
159 | corresponding type. These generated classes are even thinner than the model |
160 | class, providing no public methods but simply hooking into Catalyst's |
161 | model() accessor via the |
162 | L<ACCEPT_CONTEXT|Catalyst::Component/ACCEPT_CONTEXT> mechanism. The complete |
163 | contents of each generated class is roughly equivalent to the following: |
164 | |
165 | package MyApp::Model::FilmDB::Actor |
166 | sub ACCEPT_CONTEXT { |
167 | my ($self, $c) = @_; |
168 | $c->model('FilmDB')->resultset('Actor'); |
169 | } |
170 | |
171 | In short, there are three techniques available for obtaining a DBIC |
172 | resultset object: |
173 | |
174 | # the long way |
175 | my $rs = $c->model('FilmDB')->schema->resultset('Actor'); |
176 | |
177 | # using the shortcut method on the model object |
178 | my $rs = $c->model('FilmDB')->resultset('Actor'); |
179 | |
180 | # using the generated class directly |
181 | my $rs = $c->model('FilmDB::Actor'); |
182 | |
c082639a |
183 | In order to add methods to a DBIC resultset, you cannot simply add them to |
184 | the source (row, table) definition class; you must define a separate custom |
185 | resultset class. See L<DBIx::Class::Manual::Cookbook/"Predefined searches"> |
186 | for more info. |
187 | |
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188 | =head1 CONFIG PARAMETERS |
189 | |
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190 | =head2 schema_class |
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191 | |
192 | This is the classname of your L<DBIx::Class::Schema> Schema. It needs |
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193 | to be findable in C<@INC>, but it does not need to be inside the |
194 | C<Catalyst::Model::> namespace. This parameter is required. |
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195 | |
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196 | =head2 connect_info |
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197 | |
198 | This is an arrayref of connection parameters, which are specific to your |
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199 | C<storage_type> (see your storage type documentation for more details). |
200 | If you only need one parameter (e.g. the DSN), you can just pass a string |
201 | instead of an arrayref. |
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202 | |
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203 | This is not required if C<schema_class> already has connection information |
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204 | defined inside itself (which isn't highly recommended, but can be done) |
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205 | |
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206 | For L<DBIx::Class::Storage::DBI>, which is the only supported |
207 | C<storage_type> in L<DBIx::Class> at the time of this writing, the |
208 | parameters are your dsn, username, password, and connect options hashref. |
209 | |
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210 | See L<DBIx::Class::Storage::DBI/connect_info> for a detailed explanation |
211 | of the arguments supported. |
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212 | |
213 | Examples: |
214 | |
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215 | connect_info => { |
216 | dsn => 'dbi:Pg:dbname=mypgdb', |
217 | user => 'postgres', |
218 | password => '' |
219 | } |
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220 | |
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221 | connect_info => { |
222 | dsn => 'dbi:SQLite:dbname=foo.db', |
223 | on_connect_do => [ |
224 | 'PRAGMA synchronous = OFF', |
225 | ] |
226 | } |
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227 | |
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228 | connect_info => { |
229 | dsn => 'dbi:Pg:dbname=mypgdb', |
230 | user => 'postgres', |
231 | password => '', |
232 | pg_enable_utf8 => 1, |
233 | on_connect_do => [ |
234 | 'some SQL statement', |
235 | 'another SQL statement', |
236 | ], |
237 | } |
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238 | |
8281c933 |
239 | Or using L<Config::General>: |
240 | |
241 | <Model::FilmDB> |
242 | schema_class MyApp::Schema::FilmDB |
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243 | roles Caching |
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244 | <connect_info> |
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245 | dsn dbi:Pg:dbname=mypgdb |
246 | user postgres |
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247 | password "" |
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248 | auto_savepoint 1 |
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249 | quote_char """ |
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250 | on_connect_do some SQL statement |
251 | on_connect_do another SQL statement |
252 | </connect_info> |
253 | </Model::FilmDB> |
254 | |
255 | or |
256 | |
257 | <Model::FilmDB> |
258 | schema_class MyApp::Schema::FilmDB |
259 | connect_info dbi:SQLite:dbname=foo.db |
260 | </Model::FilmDB> |
261 | |
2201c2e4 |
262 | Or using L<YAML>: |
263 | |
264 | Model::MyDB: |
265 | schema_class: MyDB |
266 | connect_info: |
267 | dsn: dbi:Oracle:mydb |
268 | user: mtfnpy |
269 | password: mypass |
270 | LongReadLen: 1000000 |
271 | LongTruncOk: 1 |
272 | on_connect_do: [ "alter session set nls_date_format = 'YYYY-MM-DD HH24:MI:SS'" ] |
273 | cursor_class: 'DBIx::Class::Cursor::Cached' |
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274 | quote_char: '"' |
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275 | |
276 | The old arrayref style with hashrefs for L<DBI> then L<DBIx::Class> options is also |
277 | supported: |
278 | |
279 | connect_info => [ |
280 | 'dbi:Pg:dbname=mypgdb', |
281 | 'postgres', |
282 | '', |
283 | { |
284 | pg_enable_utf8 => 1, |
285 | }, |
286 | { |
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287 | auto_savepoint => 1, |
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288 | on_connect_do => [ |
289 | 'some SQL statement', |
290 | 'another SQL statement', |
291 | ], |
292 | } |
293 | ] |
294 | |
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295 | =head2 roles |
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296 | |
297 | Array of Roles to apply at BUILD time. Roles are relative to the |
298 | C<<MyApp::Model::DB::Role::> then C<<Catalyst::Model::DBIC::Schema::Role::>> |
299 | namespaces, unless prefixed with C<+> in which case they are taken to be a |
300 | fully qualified name. E.g.: |
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301 | |
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302 | roles Caching |
303 | roles +MyApp::DB::Role::Foo |
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304 | |
0fbbc8d5 |
305 | This is done using L<MooseX::Object::Pluggable>. |
2201c2e4 |
306 | |
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307 | A new instance is created at application time, so any consumed required |
308 | attributes, coercions and modifiers will work. |
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309 | |
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310 | Roles are applied before setup, schema and connection are set. |
0fbbc8d5 |
311 | |
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312 | C<ref $self> will be an anon class if any roles are applied. |
313 | |
314 | You cannot modify C<new> or C<BUILD>, modify C<setup> instead. |
0fbbc8d5 |
315 | |
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316 | L</ACCEPT_CONTEXT> and L</finalize> can also be modified. |
0fbbc8d5 |
317 | |
318 | Roles that come with the distribution: |
319 | |
320 | =over 4 |
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321 | |
0fbbc8d5 |
322 | =item L<Catalyst::Model::DBIC::Schema::Role::Caching> |
323 | |
c4fee9b8 |
324 | =item L<Catalyst::Model::DBIC::Schema::Role::Replicated> |
325 | |
0fbbc8d5 |
326 | =back |
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327 | |
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328 | =head2 storage_type |
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329 | |
330 | Allows the use of a different C<storage_type> than what is set in your |
331 | C<schema_class> (which in turn defaults to C<::DBI> if not set in current |
f1613faa |
332 | L<DBIx::Class>). Completely optional, and probably unnecessary for most |
333 | people until other storage backends become available for L<DBIx::Class>. |
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334 | |
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335 | =head1 METHODS |
336 | |
c4fee9b8 |
337 | =head2 new |
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338 | |
339 | Instantiates the Model based on the above-documented ->config parameters. |
0f2fd2c0 |
340 | The only required parameter is C<schema_class>. C<connect_info> is |
341 | required in the case that C<schema_class> does not already have connection |
342 | information defined for it. |
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343 | |
c4fee9b8 |
344 | =head2 schema |
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345 | |
346 | Accessor which returns the connected schema being used by the this model. |
347 | There are direct shortcuts on the model class itself for |
348 | schema->resultset, schema->source, and schema->class. |
349 | |
c4fee9b8 |
350 | =head2 composed_schema |
f1613faa |
351 | |
352 | Accessor which returns the composed schema, which has no connection info, |
353 | which was used in constructing the C<schema> above. Useful for creating |
354 | new connections based on the same schema/model. There are direct shortcuts |
355 | from the model object for composed_schema->clone and composed_schema->connect |
356 | |
c4fee9b8 |
357 | =head2 clone |
f1613faa |
358 | |
359 | Shortcut for ->composed_schema->clone |
360 | |
c4fee9b8 |
361 | =head2 connect |
f1613faa |
362 | |
363 | Shortcut for ->composed_schema->connect |
364 | |
c4fee9b8 |
365 | =head2 source |
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366 | |
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367 | Shortcut for ->schema->source |
368 | |
c4fee9b8 |
369 | =head2 class |
f1613faa |
370 | |
371 | Shortcut for ->schema->class |
372 | |
c4fee9b8 |
373 | =head2 resultset |
f1613faa |
374 | |
375 | Shortcut for ->schema->resultset |
376 | |
c4fee9b8 |
377 | =head2 storage |
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378 | |
379 | Provides an accessor for the connected schema's storage object. |
380 | Used often for debugging and controlling transactions. |
b8427e0b |
381 | |
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382 | =cut |
383 | |
2ff00e2b |
384 | has 'schema' => (is => 'rw', isa => 'DBIx::Class::Schema'); |
0fbbc8d5 |
385 | |
386 | has 'schema_class' => ( |
387 | is => 'ro', |
388 | isa => SchemaClass, |
389 | coerce => 1, |
390 | required => 1 |
391 | ); |
392 | |
3f139b02 |
393 | has 'storage_type' => (is => 'rw', isa => Str); |
0fbbc8d5 |
394 | |
395 | has 'connect_info' => (is => 'ro', isa => ConnectInfo, coerce => 1); |
396 | |
3f139b02 |
397 | has 'model_name' => (is => 'ro', isa => Str, default => sub { |
0fbbc8d5 |
398 | my $self = shift; |
399 | |
2201c2e4 |
400 | my $class = ref $self; |
0fbbc8d5 |
401 | (my $model_name = $class) =~ s/^[\w:]+::(?:Model|M):://; |
2201c2e4 |
402 | |
0fbbc8d5 |
403 | $model_name |
404 | }); |
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405 | |
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406 | has 'roles' => (is => 'ro', isa => ArrayRef|Str); |
ad91060a |
407 | |
61ed82a5 |
408 | has '_default_cursor_class' => ( |
409 | is => 'ro', |
410 | isa => CursorClass, |
411 | default => 'DBIx::Class::Storage::DBI::Cursor', |
412 | coerce => 1 |
413 | ); |
414 | |
0fbbc8d5 |
415 | sub BUILD { |
416 | my $self = shift; |
417 | my $class = ref $self; |
2201c2e4 |
418 | my $schema_class = $self->schema_class; |
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419 | |
2201c2e4 |
420 | if( !$self->connect_info ) { |
f1613faa |
421 | if($schema_class->storage && $schema_class->storage->connect_info) { |
2201c2e4 |
422 | $self->connect_info($schema_class->storage->connect_info); |
f1613faa |
423 | } |
424 | else { |
39f5f008 |
425 | die "Either ->config->{connect_info} must be defined for $class" |
460e3ac8 |
426 | . " or $schema_class must have connect info defined on it." |
427 | . " Here's what we got:\n" |
f1613faa |
428 | . Dumper($self); |
429 | } |
7db6da78 |
430 | } |
431 | |
0fbbc8d5 |
432 | if (exists $self->connect_info->{cursor_class}) { |
433 | eval { Class::MOP::load_class($self->connect_info->{cursor_class}) } |
434 | or croak "invalid connect_info: Cannot load your cursor_class" |
435 | . " ".$self->connect_info->{cursor_class}.": $@"; |
436 | } |
437 | |
438 | $self->_plugin_ns('Role'); |
439 | |
440 | $self->load_plugins($self->roles->flatten) if $self->roles; |
441 | |
442 | $self->setup; |
443 | |
f1613faa |
444 | $self->composed_schema($schema_class->compose_namespace($class)); |
2201c2e4 |
445 | |
f1613faa |
446 | $self->schema($self->composed_schema->clone); |
447 | |
2201c2e4 |
448 | $self->schema->storage_type($self->storage_type) |
449 | if $self->storage_type; |
7db6da78 |
450 | |
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451 | $self->schema->connection($self->connect_info); |
452 | |
453 | $self->_install_rs_models; |
c4fee9b8 |
454 | |
455 | $self->finalize; |
2201c2e4 |
456 | } |
457 | |
458 | sub clone { shift->composed_schema->clone(@_); } |
459 | |
460 | sub connect { shift->composed_schema->connect(@_); } |
461 | |
462 | sub storage { shift->schema->storage(@_); } |
463 | |
5ec3e6cb |
464 | sub resultset { shift->schema->resultset(@_); } |
465 | |
c4fee9b8 |
466 | =head2 setup |
2201c2e4 |
467 | |
c4fee9b8 |
468 | Called at C<<BUILD>> time before configuration. |
2201c2e4 |
469 | |
470 | =cut |
471 | |
0fbbc8d5 |
472 | sub setup { 1 } |
2201c2e4 |
473 | |
c4fee9b8 |
474 | =head2 finalize |
475 | |
476 | Called at the end of C<BUILD> after everything has been configured. |
477 | |
478 | =cut |
479 | |
480 | sub finalize { 1 } |
481 | |
482 | =head2 ACCEPT_CONTEXT |
2201c2e4 |
483 | |
0fbbc8d5 |
484 | Point of extension for doing things at C<<$c->model>> time, returns the model |
485 | instance, see L<Catalyst::Manual::Intro> for more information. |
2201c2e4 |
486 | |
0fbbc8d5 |
487 | =cut |
2201c2e4 |
488 | |
0fbbc8d5 |
489 | sub ACCEPT_CONTEXT { shift } |
2201c2e4 |
490 | |
491 | sub _install_rs_models { |
492 | my $self = shift; |
7b1fe8c2 |
493 | my $class = $self->_original_class_name; |
2201c2e4 |
494 | |
ad91060a |
495 | no strict 'refs'; |
39f5f008 |
496 | |
497 | my @sources = $self->schema->sources; |
498 | |
499 | die "No sources found (did you forget to define your tables?)" |
500 | unless @sources; |
501 | |
502 | foreach my $moniker (@sources) { |
0b2a7108 |
503 | my $classname = "${class}::$moniker"; |
7db6da78 |
504 | *{"${classname}::ACCEPT_CONTEXT"} = sub { |
ad91060a |
505 | shift; |
2201c2e4 |
506 | shift->model($self->model_name)->resultset($moniker); |
ad91060a |
507 | } |
508 | } |
2201c2e4 |
509 | } |
ad91060a |
510 | |
61ed82a5 |
511 | sub _reset_cursor_class { |
512 | my $self = shift; |
513 | |
514 | if ($self->storage->can('cursor_class')) { |
515 | $self->storage->cursor_class($self->_default_cursor_class) |
516 | if $self->storage->cursor_class ne $self->_default_cursor_class; |
517 | } |
518 | } |
519 | |
50f488ec |
520 | { |
521 | my %COMPOSED_CACHE; |
522 | |
523 | sub composed_schema { |
524 | my $self = shift; |
525 | my $class = $self->_original_class_name; |
526 | my $store = \$COMPOSED_CACHE{$class}{$self->schema_class}; |
527 | |
528 | $$store = shift if @_; |
529 | |
530 | return $$store |
531 | } |
532 | } |
533 | |
0fbbc8d5 |
534 | __PACKAGE__->meta->make_immutable; |
2201c2e4 |
535 | |
ad91060a |
536 | =head1 SEE ALSO |
537 | |
7b39f3f0 |
538 | General Catalyst Stuff: |
539 | |
540 | L<Catalyst::Manual>, L<Catalyst::Test>, L<Catalyst::Request>, |
541 | L<Catalyst::Response>, L<Catalyst::Helper>, L<Catalyst>, |
542 | |
543 | Stuff related to DBIC and this Model style: |
544 | |
545 | L<DBIx::Class>, L<DBIx::Class::Schema>, |
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546 | L<DBIx::Class::Schema::Loader>, L<Catalyst::Helper::Model::DBIC::Schema>, |
547 | L<MooseX::Object::Pluggable> |
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548 | |
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549 | Roles: |
550 | |
551 | L<Catalyst::Model::DBIC::Schema::Role::Caching>, |
552 | L<Catalyst::Model::DBIC::Schema::Role::Replicated> |
553 | |
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554 | =head1 AUTHOR |
555 | |
556 | Brandon L Black, C<blblack@gmail.com> |
557 | |
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558 | Contributors: |
559 | |
560 | Rafael Kitover, C<<rkitover at cpan.org>> |
561 | |
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562 | =head1 COPYRIGHT |
563 | |
564 | This program is free software, you can redistribute it and/or modify it |
565 | under the same terms as Perl itself. |
566 | |
567 | =cut |
568 | |
569 | 1; |