2
Answers
Programatically create an entity reference field for products
There is a great example of how to create a entity reference field here. http://drupal.org/node/1264160
This works if you are focusing on one bundle.
However Commerce Products usually have more than on bundle.
I'm wondering if anyone knows the best way to handle this.
A huge thank you to anyone who could point me in the right direction. (Maybe an example somewhere else ?)
Here the code from the link above
$field = array(
'field_name' => 'your_field_name',
'type' => 'entityreference',
'cardinality' => FIELD_CARDINALITY_UNLIMITED,
'settings' => array(
'target_type' => 'your_entity_type',
'handler_settings' => array('target_bundles' => array('your_entity_bundle')), // I'm not sure how to handle multiple bundles here
),
);
field_create_field($field);
$instance = array(
'field_name' => 'your_field_name',
'entity_type' => 'your_instance_entity_type',
'bundle' => 'your_instance_entity_bundle', // Also is it possible to use multiple bundles here ?
'label' => 'Your Label',
'widget' => array(
'type' => 'options_select',
),
'settings' => array(
'target_type' => 'your_entity_type',
'handler_settings' => array('target_bundles' => array('your_entity_bundle')),
),
);
field_create_instance($instance); 
Comments
Did u get that working?
1.How to create fields if the node has more than 1 entity reference fields
2. get more than 1 field from the referenced entity in to the form like eg: SKU and price