drupal7

PROBLEM: 

I needed to add a NOT IN condition with a nested query for the WHERE condition. The usual method wont work

 

$view->query->where[1]['conditions'][] = array(
            ['field'] => 'groups_group_membership.type'
            ['value'] => array
                (
                    [0] => 'SELECT_QUERY_HERE'
                  
                )

            ['operator'] => IN
        );

SOLUTION :

The way that works

Problem:

Drupal sometimes shows errors as follows 

Message	EntityMetadataWrapperException: Unknown data property field_activity_status.

Problem:

I face an uncommon situation where I needed to get the order by the user who is the customer (or the person who ordered the item) and I also had the id of the product i purchased. Usually what happens is we need to find 

• What oreders were done by the users
• What products (commerce_products) are in the order etc:-...

Solution:

I had 2 approaches 

Problem:

I need to chnage the location of an enabled/installed drupal module

Solution:

Easy change the module location Ex (sites/all/modules --->>> sites/all/modules/contrib). 

Run the following commands

• drush php-eval 'registry_rebuild();'
• drush updb -n.
• drush cc all

Thats it NO MORE ERROR MESSAGES .....!!!!

Problem : How does hook_update_n work in Drupal.

Why we use it: We want to perform a change on a website that is already live. We cannot uninstall and re-enable the module. So we add a hook_update_n

Solution

Well Idealy its all about the naming of the hook SO it goes like this

mymodulename_update_7002
what is 7002?