update field value

Question

how to update a field value of one content type node when a field value of another content type is changed using hook_node_presave?

for eg: content type | field name | field value | updated value

       product      | product_stock |      10     |     24
       Add stock    | stock value   |      14     |

sorry for the example. i mean to say: content type field name field value updated value product product_stock 10 24 Add stock stock value 14 — aashi, Commented Jan 22, 2013 at 6:26

SGhosh · Accepted Answer · 2013-01-22 08:02:18Z

0

First of all you need to link the two nodes - check out this module - http://drupal.org/project/references. It provides a field (add to one content type) that stores reference (of another reference type) ie. the nid
So 2 nodes will now be connected.
Next, in your hook_node_update check when node of the first content type is updated - get the nid of the related node from its node reference field => node_load(nid) => change whatever value you want => node_save(nid).

Hope this wokrs for you. All the best!

answered Jan 22, 2013 at 8:02

SGhosh

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how to get get the nid of the related node from its node reference field. Plz reply. I think it will work
– aashi
Commented Jan 22, 2013 at 8:49
function my_module_node_presave($node){ if($node->type == 'add_stock') { $product = $node->field_stock_value['und'][0]['value']; drupal_set_message($product); $addStock = $node->field_reference['und'][0]['nid']; $p_node = node_load($addStock); drupal_set_message($p_node); } }
– aashi
Commented Jan 22, 2013 at 9:06
i had done this, written above. I had created a custom module my_module and inside that my_module_node_presave. But it gives an fatal error.
– aashi
Commented Jan 22, 2013 at 9:08
If you don't know laready then first off all install drupal.org/project/devel. Then you can check your node object(or anything in any function) using dsm($node). In there you will find the nid from node reference field. Hoe far have you got till now?
– SGhosh
Commented Jan 22, 2013 at 10:34
And I think hook_node_update might(I say might...not sure) be the place to do this.
– SGhosh
Commented Jan 22, 2013 at 10:40

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