- Development - lists.drupal.org

5/6: cache_clear_all(), custom items, and no cache_lifetime > failure
by Morbus Iff 23 Jun '08

23 Jun '08

Michelle ran into it long ago in her Advanced Forum module, and I ran into it a while back in regards to blocks. I just ran into it again today in a non-block scenario. In short: http://www.lullabot.com/articles/a_beginners_guide_to_caching_data will only work if you have a "Minimum cache lifetime" set. Cache expiration, for items with a custom expiration, will never automatically occur, as cache_clear_all('', 'cache') is never called. This happens in Drupal 5 and 6. There are three ways that cache can be expired: 1) you manually expire your own entry. 2) cache_clear_all() is called with the right parameters. 3) cache_get() is called, with a minimum cache_lifetime set. For now, let's safely ignore 1) since the explanation of cache_set() suggests that setting your own expiration timestamp treats the item as CACHE_TEMPORARY, and that it'll be flushed in the next general clear. Also ignore #3 - let's assume no minimum cache lifetime was set. If we take a look at cache_clear_all(): http://api.drupal.org/api/function/cache_clear_all/5 http://api.drupal.org/api/function/cache_clear_all/6 we can see the helpful comment of "No minimum cache lifetime, flush all temporary cache entries now." To get this code to run, however, the $cid must be empty *and $table must be set to 'cache'*. If both cid and table are empty, then the function defaults to clearing cache_block and cache_page. But, if you grep for "cache_clear_all()" in core, you'll never find an instance of "cache_clear_all(NULL, 'cache')". You'll see lots of "cache_clear_all()"s with no parameters, and lots of specific clearing, but nothing that specifically clears out temporary items in 'cache'. You won't even see a "destroy everything" cache_clear_all(*, 'cache', TRUE). I consider this a bug: * garbage collection should happen automatically - else, why would a calling module tell cache_set() about the expiry date if it's the module's responsibility to clean it up? * "Minimum cache lifetime" is a performance tweak, and should not be required to properly clear CACHE_TEMPORARY items. How to fix the bug? Honestly, I don't know - one would, presumably, add a cache_clear_all(NULL, 'cache') to a hook_cron implementation, but I'm not the one to know the best location for that. Suggestions? And, naturally, if my reasoning is all wrong, lemme know too. -- Morbus Iff ( if god is my witness, god must be blind ) Technical: http://www.oreillynet.com/pub/au/779 Enjoy: http://www.disobey.com/ and http://www.videounderbelly.com/ aim: akaMorbus / skype: morbusiff / icq: 2927491 / jabber.org: morbus

2 1

Re: [development] module_exists vs. functions_exists?
by Aaron Winborn 23 Jun '08

23 Jun '08

Ah, thanks. Keeping it simple... ----- Original Message ----- From: "Daniel F. Kudwien" <news(a)unleashedmind.com> To: development(a)drupal.org Sent: Monday, June 23, 2008 8:53:52 AM GMT -05:00 US/Canada Eastern Subject: Re: [development] module_exists vs. functions_exists? > $foo = module_invoke('module_name', 'api_function', $bar); ...without module_exists() is sufficient. module_invoke() invokes module_hook(), which in turn checks for function_exists(). Also, module_invoke() is not limited to Drupal hooks / API callbacks. If the returned results of call_user_func_array() work for your particular implementation, this is the best approach for each module that wants to integrate with another, optionally installed module in contrib. @see http://api.drupal.org/api/function/module_invoke/5 @see http://api.drupal.org/api/function/module_hook/5 Daniel

1 0

DrupalCon Szeged registration
by Dries Buytaert 22 Jun '08

22 Jun '08

I had to share this: I just completed my DrupalCon Szeged registration. The conference organization and the registration system on the website are truly remarkable. Keep up the great work! (If you haven't registered yet for DrupalCon Szeged, now is the time as the conference will become more expensive at the end of the week.) -- Dries Buytaert :: http://buytaert.net

1 0

custom module with five star module colabration
by bharani kumar 22 Jun '08

22 Jun '08

hi I am installed the five start module, I developed the custome module , name of module is event I am displaying event title,name,and star voting , How to display this star voting into the custom event, Expecting best solution

2 1

Error when install two Drupal 6.2 with PGSQL and table prefix (and patch)
by Saint-Genest Gwenael 19 Jun '08

19 Jun '08

Hi, Today, i've tried to install two sets of datas into a drupal 6.2 database (with pgsql). With a table prefix i've take an error like : Warning: pg_query() [function.pg-query]: Query failed: ERROR: type "int_unsigned" already exists in /var/www/xxxxxx/drupal-6.2/includes/database.pgsql.inc on line 138 Warning: ERROR: type "int_unsigned" already exists query: CREATE DOMAIN int_unsigned integer CHECK (VALUE >= 0) in /var/www/xxxxxx/drupal-6.2/includes/database.pgsql.inc on line 159 Warning: pg_query() [function.pg-query]: Query failed: ERROR: type "smallint_unsigned" already exists in /var/www/xxxxxx/drupal-6.2/includes/database.pgsql.inc on line 138 Warning: ERROR: type "smallint_unsigned" already exists query: CREATE DOMAIN smallint_unsigned smallint CHECK (VALUE >= 0) in /var/www/xxxxxx/drupal-6.2/includes/database.pgsql.inc on line 159 Warning: pg_query() [function.pg-query]: Query failed: ERROR: type "bigint_unsigned" already exists in /var/www/xxxxxx/drupal-6.2/includes/database.pgsql.inc on line 138 Warning: ERROR: type "bigint_unsigned" already exists query: CREATE DOMAIN bigint_unsigned bigint CHECK (VALUE >= 0) in /var/www/xxxxxx/drupal-6.2/includes/database.pgsql.inc on line 159 Ok ... Drupal try to create data types two times ... and crash :( If anyone else has the same error, this patch can solve this problem : --=={ snip }==-- --- drupal-6.2-ref/modules/system/system.install 2008-06-19 10:19:36.000000000 +0200 +++ drupal-6.2/modules/system/system.install 2008-06-19 15:53:28.000000000 +0200 @@ -302,9 +302,15 @@ function system_install() { if ($GLOBALS['db_type'] == 'pgsql') { // Create unsigned types. - db_query("CREATE DOMAIN int_unsigned integer CHECK (VALUE >= 0)"); - db_query("CREATE DOMAIN smallint_unsigned smallint CHECK (VALUE >= 0)"); - db_query("CREATE DOMAIN bigint_unsigned bigint CHECK (VALUE >= 0)"); + if (!db_result(db_query("SELECT COUNT(*) FROM pg_type WHERE typname = 'int_unsigned'"))) { + db_query("CREATE DOMAIN int_unsigned integer CHECK (VALUE >= 0)"); + } + if (!db_result(db_query("SELECT COUNT(*) FROM pg_type WHERE typname = 'smallint_unsigned'"))) { + db_query("CREATE DOMAIN smallint_unsigned smallint CHECK (VALUE >= 0)"); + } + if (!db_result(db_query("SELECT COUNT(*) FROM pg_type WHERE typname = 'bigint_unsigned'"))) { + db_query("CREATE DOMAIN bigint_unsigned bigint CHECK (VALUE >= 0)"); + } // Create functions. db_query('CREATE OR REPLACE FUNCTION "greatest"(numeric, numeric) RETURNS numeric AS --=={ snip }==-- Gwen -- Gwenael Saint-Genest MAKINA CORPUS - www.makina-corpus.com 44 boulevard des Pas Enchantés FR-44230 Saint Sébastien sur Loire Tel : +33 (0) 2 40 94 96 08

2 1

Security Assurance in FOSS: Request for contribution
by Andre Harale 18 Jun '08

18 Jun '08

Dear members of the Drupal project, we kindly ask for your participation in our survey on security assurance in free/open source software. Security assurances are confidence building activities through structured design processes, documentation, and testing. By participating in our survey you contribute to ongoing research with the aim to make free/open source software more secure. It will not take more than 10 minutes of your valuable time for our 21 questions. Our survey is online for the next two weeks until July 1 at: http://survey.mi.fu-berlin.de/public/survey.php?name=fosssecurity Please find the results of the survey on the project page during July: https://www.inf.fu-berlin.de/w/SE/FOSSSecuritySurvey For further information about Open Source research at the Research Group Software Engineering at Freie Universitaet Berlin, please visit: https://www.inf.fu-berlin.de/w/SE/FOSSHome Thank you in anticipation, Sascha Rasmussen, Alexander Kunze, and Andre Haralevich In case you participate in more than one FOSS project, please fill out the questionnaire for the one where security is most important, or fill out one questionnaire per project. Thank you!

1 0

Is it possible to serialize the output of a custom block and unserialize the value in a page.tpl.php ?
by Juan Rodriguez 18 Jun '08

18 Jun '08

Hello, I am trying to serialize the output of a block, which is received in a page.tpl with the $content variable. It seems it does not work, but I don't know why, because I can output the serialized string (using $content) in a page.tpl.php file but if I try to unserialize it and afterwards try to print_r the result, it shows nothing. Does anybody have any clue? It seems quite weird to me...

2 1

Help with hook_search
by Ron Parker 17 Jun '08

17 Jun '08

I just submitted an issue here: http://drupal.org/node/271604. The Drupal 5.x and 6.x hook_search documentation is incorrect. I just want to add another tab to the search form that, for right now, just does another regular search. Not specialized in any way (at least right now). Just a normal search, but the api documentation is incorrect and I can't find any examples anywhere of how to do this. Can someone point me in the right direction, or show me the hook_search api code that *does* work? Thanks! -ron -- Ron Parker Software Creations http://www.scbbs.com Self-Administration Web Site http://saw.scbbs.com SDSS Subscription Mgmt Service http://sdss.scbbs.com Central Ave Dance Ensemble http://www.centralavedance.com R & B Salsa http://www.randbsalsa.com

2 2

RFC: Drupal pluggable systems
by Larry Garfield 17 Jun '08

17 Jun '08

Recently I've been talking up various ideas for pluggable subsystems in Drupal in IRC and the other usual haunts. Ideas have been percolating in my head, but so far I have been remiss in actually writing them down. Yesterday, however, I had an epiphany to solve the primary issue I was trying to work out, so I present a hopefully workable RFC (for real, not IETF version) for pluggable subsystems in Drupal. For the full write-up, please see: http://www.garfieldtech.com/blog/drupal-handler-rfc In the interests of simplicity, *please* don't reply on the list. Reply on the post above. Thanks. -- Larry Garfield AIM: LOLG42 larry(a)garfieldtech.com ICQ: 6817012 "If nature has made any one thing less susceptible than all others of exclusive property, it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one, and the receiver cannot dispossess himself of it." -- Thomas Jefferson

2 2

Drupal 6.2 theme system standalone
by Bob Pepin 14 Jun '08

14 Jun '08

Hello, I've extracted a couple of functions from drupal 6.2 so I can use drupal themes in my own CMS without using the rest of drupal. It's only been a couple of hours since I started work on this, so this is still all very rough. So far it runs the themes included with drupal (bluemarine, chameleon, garland and pushbutton) and the internet_services theme from the drupal themes site. To play with it, you need to extract the attached file into a directory and copy the include/theme.inc file and the themes/ folder from the drupal distribution into that directory. Bob

15 34