I have a type node called flat, a field called latitude. I want to update the value of this field in a module each time the node is updated.

I try to use the hook_node_update() but nothing happens :

function flat_node_update($node){
    return $node;

Do you have the answer?

  • hook_node_update() should not return any value; changing the values of the fields in $node, and then returning the modified object doesn't work. – kiamlaluno Apr 5 '11 at 16:19

hook_node_update() is called after the node has been updated.

You want hook_node_presave() instead. If the nid is not empty, it is an update.

| improve this answer | |
  • But just for a test, I try to print 'hello', and nothing happen with these functions. It's like my hook are not called. – Bulba Apr 6 '11 at 9:24
  • 1
    Use drupal_set_message() or dpm() for debugging, not print. Did you clear the cache after you added your hook implementation? – Berdir Apr 6 '11 at 12:36
  • Is the function in a module called "flat"? In the case above the module file would be called flat.module and would be in a directory called module which is enabled. If nothing is being echoed to the screen at all this may be the reason. – Gold Jan 7 '14 at 7:15

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