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1 | =head1 NAME |
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2 | |
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3 | Catalyst::Delta - Overview of changes between versions of Catalyst |
4 | |
5 | =head1 DESCRIPTION |
6 | |
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7 | This is an overview of the user-visible changes to Catalyst between major |
8 | Catalyst releases. |
9 | |
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10 | =head2 VERSION 5.90102 - 5.90103 |
11 | |
12 | A significant change is that we now preserve the value of $c->state from action |
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13 | to following action. This gives you a new way to pass a value between actions |
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14 | in a chain, for example. However any 'auto' actions always have $c->state |
15 | forced to be set to 0, which is the way its been for a long time, this way an |
16 | auto action is required to return 1 to pass the match. It also exists to maintain |
17 | compatibility with anyone that exits an auto action with a detach (which is not a |
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18 | documented way to escape matching, but exists in the wild since it worked as a |
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19 | side effect of the code for a long time). |
20 | |
21 | Additionally, upon $c->detach we also force set state to 0. |
22 | |
23 | Version 5.90102 contains a version of this change but its considered buggy, so |
24 | that is a version to avoid. |
25 | |
5e7e6b27 |
26 | =head2 VERSION 5.90100 |
27 | |
28 | Support for type constraints in Args and CaptureArgs has been improved. You may |
29 | now inherit from a base controller that declares type constraints and use roles |
30 | that declare type constraints. See L<Catalyst::RouteMatching> for more. |
31 | |
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32 | You may now. also use a full type constraint namespace instead of importing type |
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33 | constraints into your package namespace. |
34 | |
35 | We changed the way the middleware stash works so that it no longer localizes |
36 | the PSGI env hashref. This was done to fix bugs where people set PSGI ENV hash |
79fb8f95 |
37 | keys and found them to disappear in certain cases. It also means that now if |
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38 | a sub applications sets stash variables, that stash will now bubble up to the |
39 | parent application. This may be a breaking change for you since previous |
40 | versions of this code did not allow that. A workaround is to explicitly delete |
41 | stash keys in your sub application before returning control to the parent |
42 | application. |
43 | |
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44 | =head2 VERSION 5.90097 |
45 | |
46 | =head3 Defined how $c->uri_for adds a URI fragment. |
47 | |
48 | We now have a specification for creating URIs with fragments (or HTML anchors). |
49 | Previously you could do this as a side effect of how we create URIs but this |
50 | side effect behavior was never documented or tested, and was broken when we |
51 | introduced default UTF-8 encoding. When creating URIs with fragments please |
52 | follow the new, supported specification: |
53 | |
54 | $c->uri_for($action_or_path, \@captures_or_args, @args, \$query, \$fragment); |
55 | |
56 | This will be a breaking change for some codebases, we recommend testing if |
57 | you are creating URLs with fragments. |
58 | |
02336198 |
59 | B<NOTE> If you are using the alternative: |
60 | |
61 | $c->uri_for('/foo/bar#baz') |
62 | |
63 | construction, we do not attempt to encode this and it will make a URL with a |
64 | fragment of 'baz'. |
65 | |
743f6b46 |
66 | =head2 VERSION 5.90094 |
67 | |
68 | =head3 Multipart form POST with character set headers |
69 | |
70 | When we did the UTF8 work, we punted on Form POSTs when the POST envelope was |
71 | multipart and each part had complex headers such as content-types, character |
72 | sets and so forth. In those cases instead of returning a possibly incorrect |
73 | value, we returned an object describing the part so that you could figure it |
74 | out manually. This turned out to be a bad workaround as people did not expect |
75 | to find that object. So we changed this to try much harder to get a correct |
76 | value. We still return an object if we fail but we try much harder now. If |
77 | you used to check for the object you might find that code is no longer needed |
78 | (although checking for it should not hurt or break anything either). |
79 | |
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80 | =head2 VERSION 5.90091 |
81 | |
82 | =head3 'case_sensitive' configuration |
83 | |
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84 | At one point in time we allowed you to set a 'case_sensitive' configuration value so |
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85 | that you could find actions by their private names using mixed case. We highly |
86 | discourage that. If you are using this 'feature' you should be on notice that we |
87 | plan to remove the code around it in the near future. |
88 | |
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89 | =head2 VERSION 5.90090+ |
90 | |
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91 | =head3 Type constraints on Args and CaptureArgs. |
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92 | |
93 | You may now use a type constraint (using L<Moose>, L<MooseX::Types> or preferably |
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94 | L<Type::Tiny> in your Args or CaptureArgs action attributes. This can be used |
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95 | to restrict the value of the Arg. For example: |
96 | |
97 | sub myaction :Local Args(Int) { ... } |
98 | |
99 | Would match '.../myaction/5' but not '.../myaction/string'. |
100 | |
101 | When an action (or action chain) has Args (or CaptureArgs) that declare type constraints |
102 | your arguments to $c->uri_for(...) must match those constraints. |
103 | |
104 | See L<Catalyst::RouteMatching> for more. |
105 | |
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106 | =head3 Move CatalystX::InjectComponent into core |
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107 | |
108 | L<Catalyst::Utils> has a new method 'inject_component' which works the same as the method of |
109 | the same name in L<CatalystX::InjectComponent>. |
110 | |
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111 | =head3 inject_components |
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112 | |
113 | New configuration key allows you to inject components directly into your application without |
114 | any subclasses. For example: |
115 | |
116 | MyApp->config({ |
117 | inject_components => { |
118 | 'Controller::Err' => { from_component => 'Local::Controller::Errors' }, |
119 | 'Model::Zoo' => { from_component => 'Local::Model::Foo' }, |
120 | 'Model::Foo' => { from_component => 'Local::Model::Foo', roles => ['TestRole'] }, |
121 | }, |
122 | 'Controller::Err' => { a => 100, b=>200, namespace=>'error' }, |
123 | 'Model::Zoo' => { a => 2 }, |
124 | 'Model::Foo' => { a => 100 }, |
125 | }); |
126 | |
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127 | Injected components are useful to reduce the amount of nearly empty boilerplate classes |
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128 | you might have, particularly when first starting an application. |
129 | |
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130 | =head3 Component setup changes. |
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131 | |
132 | Previously you could not depend on an application scoped component doing setup_components |
133 | since components were setup 'in order'. Now all components are first registered and then |
134 | setup, so you can now reliably use any component doing setup_components. |
135 | |
77b5811a |
136 | =head2 VERSION 5.90080+ |
137 | |
138 | The biggest change in this release is that UTF8 encoding is now enabled by |
139 | default. So you no longer need any plugins (such as L<Catalyst::Plugin::Unicode::Encoding>) |
140 | which you can just no go ahead and remove. You also don't need to set |
141 | the encoding configuration (__PACKAGE__->config(encoding=>'UTF-8')) anymore |
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142 | as well (although its presence hurts nothing). |
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143 | |
144 | If this change causes you trouble, you can disable it: |
145 | |
146 | __PACKAGE__->config(encoding=>undef); |
147 | |
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148 | For further information, please see L<Catalyst::UTF8> |
149 | |
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150 | But please report bugs. You will find that a number of common Views have been |
151 | updated for this release (such as L<Catalyst::View::TT>). In all cases that the |
152 | author is aware of these updates were to fix test cases only. You shouldn't |
153 | need to update unless you are installing fresh and want tests to pass. |
154 | |
155 | L<Catalyst::Plugin::Compress> was updated to be compatible with this release. |
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156 | You will need to upgrade if you are using this plugin. L<Catalyst::Upgrading> |
157 | also has details. |
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158 | |
159 | A small change is that the configuration setting C<using_frontend_proxy> |
160 | was not doing the right thing if you started your application with C<psgi_app> |
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161 | and did not apply the default middleware. This setting is now honored in |
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162 | all the ways an application may be started. This could cause trouble if you |
163 | are using the configuration value and also adding the proxy middleware |
164 | manually with a custom application startup. The solution is that you only |
165 | need the configuration value set, or the middleware manually added (not both). |
166 | |
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167 | =head2 VERSION 5.90060+ |
168 | |
8f3c0676 |
169 | =head3 Catalyst::Log object autoflush on by default |
170 | |
171 | Starting in 5.90065, the Catalyst::Log object has 'autoflush' which is on |
172 | by default. This causes all messages to be written to the log immediately |
173 | instead of at the end of startup and then at the end of each request. In |
174 | order to access the old behavior, you must now call: |
175 | |
176 | $c->log->autoflush(0); |
177 | |
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178 | =head3 Deprecate Catalyst::Utils::ensure_class_loaded |
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179 | |
180 | Going forward we recommend you use L<Module::Runtime>. In fact we will |
181 | be converting all uses of L<Class::Load> to L<Module::Runtime>. We will |
182 | also convert L<Catalyst::Utils\ensure_class_loaded> to be based on |
183 | L<Module::Runtime> to allow some time for you to update code, however at |
184 | some future point this method will be removed so you should stop |
185 | using it now. |
186 | |
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187 | =head3 Support passing Body filehandles directly to your Plack server. |
0fb94688 |
188 | |
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189 | We changed the way we return body content (from response) to whatever |
190 | Plack handler you are using (Starman, FastCGI, etc.) We no longer |
191 | always use the streaming interface for the cases when the body is a |
192 | simple scalar, object or filehandle like. In those cases we now just |
193 | pass the simple response on to the plack handler. This might lead to |
194 | some minor differences in how streaming is handled. For example, you |
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195 | might notice that streaming starts properly supporting chunked encoding when |
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196 | on a server that supports that, or that previously missing headers |
197 | (possible content-length) might appear suddenly correct. Also, if you |
198 | are using middleware like L<Plack::Middleware::XSendfile> and are using |
199 | a filehandle that sets a readable path, your server might now correctly |
200 | handle the file (rather than as before where Catalyst would stream it |
201 | very likely very slowly). |
202 | |
203 | In other words, some things might be meaninglessly different and some |
204 | things that were broken codewise but worked because of Catalyst being |
205 | incorrect might suddenly be really broken. The behavior is now more |
206 | correct in that Catalyst plays better with features that Plack offers |
207 | but if you are making heavy use of the streaming interface there could |
208 | be some differences so you should test carefully (this is probably not |
209 | the vast majority of people). In particular if you are developing |
210 | using one server but deploying using a different one, differences in |
211 | what those server do with streaming should be noted. |
212 | |
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213 | Please see note below about changes to filehandle support and existing |
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214 | Plack middleware to aid in backwards compatibility. |
0fb94688 |
215 | |
216 | =head3 Distinguish between body null versus undef. |
217 | |
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218 | We also now more carefully distinguish the different between a body set |
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219 | to '' and a body that is undef. This might lead to situations where |
220 | again you'll get a content-length were you didn't get one before or |
221 | where a supporting server will start chunking output. If this is an |
222 | issue you can apply the middleware L<Plack::Middleware::BufferedStreaming> |
223 | or report specific problems to the dev team. |
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224 | |
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225 | =head3 More Catalyst Middleware |
226 | |
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227 | We have started migrating code in Catalyst to equivalent Plack |
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228 | Middleware when such exists and is correct to do so. For example we now use |
229 | L<Plack::Middleware::ContentLength> to determine content length of a response |
230 | when none is provided. This replaces similar code inlined with L<Catalyst> |
231 | The main advantages to doing this is 1) more similar Catalyst core that is |
232 | focused on the Catalyst special sauce, 2) Middleware is more broadly shared |
233 | so we benefit from better collaboration with developers outside Catalyst, 3) |
234 | In the future you'll be able to change or trim the middleware stack to get |
235 | additional performance when you don't need all the checks and constraints. |
236 | |
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237 | =head3 Deprecate Filehandle like objects that do read but not getline |
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238 | |
239 | We also deprecated setting the response body to an object that does 'read' |
240 | but not 'getline'. If you are using a custom IO-Handle like object for |
241 | response you should verify that 'getline' is supported in your interface. |
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242 | Unless we here this case is a major issue for people, we will be removing support |
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243 | in a near future release of Catalyst. When the code encounters this it |
244 | will issue a warning. You also may run into this issue with L<MogileFS::Client> |
245 | which does read but not getline. For now we will just warn when encountering |
246 | such an object and fallback to the previous behavior (where L<Catalyst::Engine> |
247 | itself unrolls the filehandle and performs blocking streams). However |
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248 | this backwards compatibility will be removed in an upcoming release so you should either |
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249 | rewrite your custom filehandle objects to support getline or start using the |
250 | middleware that adapts read for getline L<Plack::Middleware::AdaptFilehandleRead>. |
251 | |
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252 | =head3 Response->headers become read-only after finalizing |
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253 | |
254 | Once the response headers are finalized, trying to change them is not allowed |
255 | (in the past you could change them and this would lead to unexpected results). |
256 | |
efa8265f |
257 | =head3 Officially deprecate L<Catalyst::Engine::PSGI> |
8e098614 |
258 | |
259 | L<Catalyst::Engine::PSGI> is also officially no longer supported. We will |
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260 | no long run test cases against this and can remove backwards compatibility code for it |
261 | as deemed necessary for the evolution of the platform. You should simply |
262 | discontinue use of this engine, as L<Catalyst> has been PSGI at the core for |
263 | several years. |
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264 | |
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265 | =head3 Officially deprecate finding the PSGI $env anyplace other than Request |
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266 | |
267 | A few early releases of Cataplack had the PSGI $env in L<Catalyst::Engine>. |
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268 | Code has been maintained here for backwards compatibility reasons. This is no |
269 | longer supported and will be removed in upcoming release, so you should update |
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270 | your code and / or upgrade to a newer version of L<Catalyst> |
271 | |
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272 | =head3 Deprecate setting Response->body after using write/write_fh |
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273 | |
274 | Setting $c->res->body to a filehandle after using $c->res->write or |
275 | $c->res->write_fh is no longer considered allowed, since we can't send |
276 | the filehandle to the underlying Plack handler. For now we will continue |
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277 | to support setting body to a simple value since this is possible, but at |
278 | some future release a choice to use streaming indicates that you will do |
279 | so for the rest of the request. |
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280 | |
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281 | |
5bb2a5b3 |
282 | =head2 VERSION 5.90053 |
283 | |
284 | We are now clarifying the behavior of log, plugins and configuration during |
285 | the setup phase. Since Plugins might require a log during setup, setup_log |
286 | must run BEFORE setup_plugins. This has the unfortunate side effect that |
287 | anyone using the popular ConfigLoader plugin will not be able to supply |
288 | configuration to custom logs since the configuration is not yet finalized |
289 | when setup_log is run (when using ConfigLoader, which is a plugin and is |
290 | not loaded until later.) |
291 | |
292 | As a workaround, you can supply custom log configuration directly into |
293 | the configuration: |
294 | |
295 | package MyApp; |
296 | use Catalyst; |
297 | |
298 | __PACKAGE__->config( |
299 | my_custom_log_info => { %custom_args }, |
300 | ); |
301 | |
302 | __PACKAGE__->setup; |
303 | |
304 | If you wish to configure the custom logger differently based on ENV, you can |
305 | try: |
306 | |
307 | package MyApp; |
308 | |
309 | use Catalyst; |
310 | use Catalyst::Utils; |
311 | |
312 | __PACKAGE__->config( |
313 | Catalyst::Utils::merge_hashes( |
314 | +{ my_custom_log_info => { %base_custom_args } }, |
315 | +{ do __PACKAGE__->path_to( $ENV{WHICH_CONF}."_conf.pl") }, |
316 | ), |
317 | ); |
318 | |
319 | __PACKAGE__->setup; |
320 | |
321 | Or create a standalone Configuration class that does the right thing. |
322 | |
323 | Basically if you want to configure a logger via Catalyst global configuration |
324 | you can't use ConfigLoader because it will always be loaded too late to be of |
325 | any use. Patches and workaround options welcomed! |
326 | |
9b3b1b9c |
327 | =head2 VERSION 5.9XXXX 'cataplack' |
c20710a1 |
328 | |
329 | The Catalyst::Engine sub-classes have all been removed and deprecated, |
330 | to be replaced with Plack handlers. |
331 | |
332 | Plack is an implementation of the L<PSGI> specification, which is |
333 | a standard interface between web servers and application frameworks. |
334 | |
335 | This should be no different for developers, and you should not have to |
336 | migrate your applications unless you are using a custom engine already. |
337 | |
338 | This change benefits Catalyst significantly by reducing the amount of |
339 | code inside the framework, and means that the framework gets upstream |
340 | bug fixes in L<Plack>, and automatically gains support for any web server |
341 | which a L<PSGI> compliant handler is written for. |
342 | |
343 | It also allows you more flexibility with your application, and allows |
344 | the use of cross web framework 'middleware'. |
345 | |
346 | Developers are recommended to read L<Catalyst::Upgrading> for notes about |
347 | upgrading, especially if you are using an unusual deployment method. |
348 | |
349 | Documentation for how to take advantage of L<PSGI> can be found in |
350 | L<Catalyst::PSGI>, and information about deploying your application |
351 | has been moved to L<Catalyst::Manual::Deployment>. |
352 | |
353 | =head3 Updated modules: |
354 | |
355 | A number of modules have been updated to pass their tests or not |
356 | produce deprecation warnings with the latest version of Catalyst. |
357 | It is recommended that you upgrade any of these that you are using |
358 | after installing this version of Catalyst. |
359 | |
360 | These extensions are: |
361 | |
362 | =over |
363 | |
364 | =item L<Catalyst::Engine::HTTP::Prefork> |
365 | |
366 | This is now deprecated, see L<Catalyst::Upgrading>. |
367 | |
368 | =item L<Test::WWW::Mechanize::Catalyst> |
369 | |
370 | Has been updated to not produce deprecation warnings, upgrade recommended. |
371 | |
372 | =item Catalyst::ActionRole::ACL |
373 | |
374 | Has been updated to fix failing tests (although older versions still |
375 | function perfectly with this version of Catalyst). |
376 | |
377 | =item Catalyst::Plugin::Session::Store::DBIC |
378 | |
379 | Has been updated to fix failing tests (although older versions still |
380 | function perfectly with this version of Catalyst). |
381 | |
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382 | =item Catalyst::Plugin::Authentication |
383 | |
384 | Has been updated to fix failing tests (although older versions still |
385 | function perfectly with this version of Catalyst). |
386 | |
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387 | =back |
1fae8c61 |
388 | |
389 | =head1 PREVIOUS VERSIONS |
390 | |
9b3b1b9c |
391 | =head2 VERSION 5.8XXXX 'catamoose' |
1fae8c61 |
392 | |
393 | =head3 Deprecations |
b31499bc |
394 | |
e88235ff |
395 | Please see L<Catalyst::Upgrading> for a full description of how changes in the |
396 | framework may affect your application. |
397 | |
398 | Below is a brief list of features which have been deprecated in this release: |
399 | |
796a8358 |
400 | =over |
b31499bc |
401 | |
796a8358 |
402 | =item ::[MVC]:: style naming scheme has been deprecated and will warn |
b31499bc |
403 | |
e88235ff |
404 | =item NEXT is deprecated for all applications and components, use MRO::Compat |
b31499bc |
405 | |
e88235ff |
406 | =item Dispatcher methods which are an implementation detail made private, public versions now warn. |
b31499bc |
407 | |
e88235ff |
408 | =item MyApp->plugin method is deprecated, use L<Catalyst::Model::Adaptor> instead. |
796a8358 |
409 | |
efa8265f |
410 | =item __PACKAGE__->mk_accessors() is supported for backwards compatibility only, use Moose attributes instead in new code. |
0a3b8de0 |
411 | |
7df44a71 |
412 | =item Use of Catalyst::Base now warns |
413 | |
796a8358 |
414 | =back |
415 | |
1fae8c61 |
416 | =head3 New features |
0a3b8de0 |
417 | |
418 | =head3 Dispatcher |
b31499bc |
419 | |
7df44a71 |
420 | =over |
421 | |
422 | =item Fix forwarding to Catalyst::Action objects. |
423 | |
424 | =item Add the dispatch_type method |
425 | |
426 | =back |
b31499bc |
427 | |
0a3b8de0 |
428 | =head3 Restarter |
b31499bc |
429 | |
6171ddd5 |
430 | The development server restarter has been improved to be compatible with |
431 | immutable Moose classes, and also to optionally use |
432 | L<B::Hooks::OP::Check::StashChange> to handle more complex application layouts |
433 | correctly. |
b31499bc |
434 | |
7df44a71 |
435 | =head3 $c->uri_for_action method. |
b31499bc |
436 | |
7df44a71 |
437 | Give a private path to the Catalyst action you want to create a URI for. |
6c18e892 |
438 | |
0a3b8de0 |
439 | =head3 Logging |
b31499bc |
440 | |
7df44a71 |
441 | Log levels have been made additive. |
b31499bc |
442 | |
0a3b8de0 |
443 | =head3 L<Catalyst::Test> |
444 | |
445 | =over |
446 | |
447 | =item Change to use L<Sub::Exporter>. |
448 | |
0a3b8de0 |
449 | =item Support mocking multiple virtual hosts |
450 | |
451 | =item New methods like action_ok and action_redirect to write more compact tests |
452 | |
453 | =back |
454 | |
7df44a71 |
455 | =head3 Catalyst::Response |
0a3b8de0 |
456 | |
7df44a71 |
457 | =over |
458 | |
459 | =item * |
460 | |
461 | New print method which prints @data to the output stream, separated by $,. |
462 | This lets you pass the response object to functions that want to write to an |
463 | L<IO::Handle>. |
464 | |
465 | =item * |
466 | |
467 | Added code method as an alias for C<< $res->status >> |
0a3b8de0 |
468 | |
d5a6de01 |
469 | =back |
470 | |
1fae8c61 |
471 | =head3 Consequences of the Moose back end |
b31499bc |
472 | |
796a8358 |
473 | =over |
474 | |
475 | =item * |
476 | |
7df44a71 |
477 | Components are fully compatible with Moose, and all Moose features, such as |
478 | method modifiers, attributes, roles, BUILD and BUILDARGS methods are fully |
479 | supported and may be used in components and applications. |
480 | |
481 | =item * |
482 | |
483 | Many reusable extensions which would previously have been plugins or base |
484 | classes are better implemented as Moose roles. |
485 | |
486 | =item * |
487 | |
a0c37f08 |
488 | L<MooseX::MethodAttributes::Role::AttrContainer::Inheritable> is used to contain action |
7df44a71 |
489 | attributes. This means that attributes are represented in the MOP, and |
490 | decouples action creation from attributes. |
796a8358 |
491 | |
492 | =item * |
493 | |
0a3b8de0 |
494 | There is a reasonable API in Catalyst::Controller for working with |
796a8358 |
495 | and registering actions, allowing a controller sub-class to replace |
25f61108 |
496 | subroutine attributes for action declarations with an alternate |
0a3b8de0 |
497 | syntax. |
796a8358 |
498 | |
499 | =item * |
500 | |
0a3b8de0 |
501 | Refactored capturing of $app from L<Catalyst::Controller> into |
502 | L<Catalyst::Component::ApplicationAttribute> for easier reuse in other |
7df44a71 |
503 | components. |
504 | |
505 | =item * |
506 | |
507 | Your application class is forced to become immutable at the end of compilation. |
508 | |
509 | =back |
510 | |
1fae8c61 |
511 | =head3 Bug fixes |
7df44a71 |
512 | |
513 | =over |
514 | |
515 | =item * |
516 | |
25f61108 |
517 | Don't ignore SIGCHLD while handling requests with the development server, so that |
7df44a71 |
518 | system() and other ways of creating child processes work as expected. |
519 | |
520 | =item * |
521 | |
522 | Fixes for FastCGI when used with IIS 6.0 |
523 | |
524 | =item * |
525 | |
526 | Fix a bug in uri_for which could cause it to generate paths with multiple |
527 | slashes in them. |
796a8358 |
528 | |
529 | =item * |
530 | |
7df44a71 |
531 | Fix a bug in Catalyst::Stats, stopping garbage being inserted into |
532 | the stats if a user calls begin => but no end |
796a8358 |
533 | |
534 | =back |
535 | |