[documentation] [bug] node_validate() is never called

[markus_petrux]

Issue status update for 
http://drupal.org/node/53639
Post a follow up: 
http://drupal.org/project/comments/add/53639

-Project:      Drupal
+Project:      Documentation
 Version:      <none>
-Component:    base system
+Component:    Developer Guide
 Category:     bug reports
 Priority:     normal
 Assigned to:  mercmobily
 Reported by:  mercmobily
 Updated by:   markus_petrux
 Status:       active

Since core is changing everyday, node_example is probably out dated; I
think this issue belongs to the Document project.


In the meantime, try to look at how core modules (maybe page or story)
or some other contrib modules work.




markus_petrux



Previous comments:
------------------------------------------------------------------------

Sun, 12 Mar 2006 10:55:02 +0000 : mercmobily

Hi,


I developed my own module type, article_node.
I wrote my own node_article_validate(&$node)  function:


function node_article_validate(&$node) {
  if (!user_load(array('name' => $node->editor_uid_name))) {
      form_set_error('editor_uid_name', t('The editor must be a valid
account'));
  }
}


...but it wouldn't get called.
I then added this to node.module ("the" node.module which comes with
Drupal):


/** * Perform validation checks on the given node. */


function node_validate($node) {
  // Convert the node to an object, if necessary.
  $node = (object)$node;
  this_does_not_exist();  // SEE THIS! THIS WAS ADDED!
  // Make sure the body has the minimum number of words.
  [...]


Well, believe it or not, EVERYTHING works absolutely fine! Add a node,
edit it... and no error is given for calling "this_does_not_exist".


I marked it as "critical", because no validation can be really bad...


Merc.




------------------------------------------------------------------------

Sun, 12 Mar 2006 13:32:40 +0000 : markus_petrux

To use hook_validate() you have to implement hook_node_info() too. See
the page.module for an example.


>> node_validate() not being invoked?
Well, I have made the following test.
1) Goto admin/settings/content-types/page
2) Set a minimum of 10 words for page nodes and save.
3) Goto node/add/page, enter a title 'test' and a body 'just 3 words'


I get an error message issued from node_validate().


I'm changing the status of this issue to 'support request' with
'normal' priority. But maybe I didn't got the problem right, so feel
free to correct me if I've been wrong.




------------------------------------------------------------------------

Sun, 12 Mar 2006 14:55:23 +0000 : mercmobily

Hello,


I have most definitely implemented node_info (in my case,
node_article_node_info() ).
The piece of code I provided was only a tiny fraction of my module
(which I will release when it's finished, BTW).


Plus, the issue was marked as critical because you can write *jokes* in
node_validate() in the CORE module node.module - it is never, ever
executed.


As I wrote above, change the core function node.module from:


------------------------
/** * Perform validation checks on the given node. */


function node_validate($node) {
// Convert the node to an object, if necessary.
$node = (object)$node;
// Make sure the body has the minimum number of words.
[...]
------------------------


To:


------------------------
/** * Perform validation checks on the given node. */


function node_validate($node) {
// Convert the node to an object, if necessary.
$node = (object)$node;


knock_knock_who_is_it_its_the_doctor_doctor_who_ah_you_said_it(); 


// Make sure the body has the minimum number of words.
[...]
-------------------------


Then, you can submit forms in the system - the node_validate is never,
ever called.


I don't know Drupal well enough yet (I've installed it a week ago for
the first time), but I have the feeling that the problem I am having is
related. 


I remember seeing a patch to avoid node_validate() being called
twice... maybe that went funny?


Bye,


Merc.




------------------------------------------------------------------------

Sun, 12 Mar 2006 15:28:40 +0000 : markus_petrux

Well, I edited my version (HEAD) of node.module to call a non-defined
function from node_validate() and..


1) Goto node/add/page
2) enter a title 'test' and a body 'hello world'
3) hit 'preview'


I got a blank page with the following:


Fatal error: Call to undefined function: test_a_non_defined_function()
in /path-to-drupal/modules/node.module on line 1608


I my case node_validate() is called.


If you can't see that, hmm... have you checked admin/logs ?




------------------------------------------------------------------------

Mon, 13 Mar 2006 01:52:26 +0000 : mercmobily

OK, you are completely right and I am a complete idiot.


Well... not 100% complete idiot.
I am not sure this is a problem with the "drupal core" - I am leaving
it here just in case it is.


I based my module on node_example.module. Now, I:


* Copied module.example *as is* and put it in "modules". I also created
its table
* I changed it slightly:


-------------------
function node_example_validate(&$node) { 


 this_does_not_exist(); // I ADDED THIS


  if ($node->quantity) {
    if (!is_numeric($node->quantity)) {
      form_set_error('quantity', t('The quantity must be a number.'));
    }
  }
---------------------


The node_example_validate hook is never called - I can create
"node_example" node types without any trouble.


Now, there are two possibilities:


* The node_example.module is somehow wrong
* The drupal core is doing something wrong


To be honest, I don't think it's the core - I tested blog.module, and
blog_validate() is indeed called.


However, I think it's worth investigating, because potentially a lot of
people will use module_example.module and will run into the same
issue...!


Thanks a million,


Merc.