I like to have core Country of Manufacture attribute displayed in the layered navigation but it seems simply selecting one of the "Filterable" options in Use In Layered Navigation field is not outputting anything. Is that possible with this core attribute or best to just create a new attribute and manage the country of manufacture data from there?
Magento – How to display core Country of Manufacture attribute in layered navigation
attributesdropdown-attributelayered-navigationmanufacturer
Related Solutions
Reference Mage_Catalog_Model_Resource_Eav_Attribute::isIndexable(), which is used by the EAV indexer to check if a given attribute may be included in the layered navigation index.
public function isIndexable()
{
// exclude price attribute
if ($this->getAttributeCode() == 'price') {
return false;
}
if (!$this->getIsFilterableInSearch() && !$this->getIsVisibleInAdvancedSearch() && !$this->getIsFilterable()) {
return false;
}
$backendType = $this->getBackendType();
$frontendInput = $this->getFrontendInput();
if ($backendType == 'int' && $frontendInput == 'select') {
return true;
} else if ($backendType == 'varchar' && $frontendInput == 'multiselect') {
return true;
} else if ($backendType == 'decimal') {
return true;
}
return false;
}
To make other input types indexable, you need to rewrite this attribute resource model (or specify a custom model that refers to a custom resource model in the eav_attribute.attribute_model property for your attribute.
The reason why the EAV indexer has this limitation, is because it only knows how to process integer values. The same is true for the layered navigation attribute filter model.
If your values are castable to integers, you will be able to get away with using a varchar or text value.
Otherwise you will have to rewrite the attribute filter model to correctly process your values, or implement your own custom filter model.
The answer is: It's the fault of the Lesti Full Page Cache - Lesti FPC Module.
In System -> Configuration -> Advanced -> System the new URI Parameters for the filters must be added!
I hadn't thought of that and actually thought it would add these or any new filters automatically - but it does not.
As for the '38-FR40' Problem .... I may ask that in a seperate question to avoid confusion with the title.
Best Answer
It currently can't be done without rewriting Magento code.
That attribute on the backend has a specific model it uses
The model is located here: Mage_Catalog_Model_Product_Attribute_Source_Countryofmanufacture
Looking at the logic in the model, it doesn't even call or mention what products are in that specific category. Going further into the Abstract, the Abstract contains no logic for layered navigation.
You can change it to be "filterable (with no results)" but that will only list the all the countries available.
I'm going to tinker with the logic to see if I can get it working, but it wouldnt be a quick fix.
[EDIT]:
Here is a link to a pull request from the Magento bugathon that implemented the required changes in the country of manufacturer and also the boolean source model.
Unfortunately it didn't get merged into the core because the original issue was related to a different source model (the table type).
The fix however will resolve your issues. https://github.com/magento/bugathon_march_2013/pull/256
Here is the link to a patch containing only source model changes (not the tests): https://gist.github.com/Vinai/bb1928021811f247c331