Multiple dropdown filters interfering with each other

Question

I have a multiple dropdown filters that lets users pick the category that they want to display results for below. See my previous question Search entries by location or name for screenshot.

So I have one working, but I need some guidance on how to do the code for the other filters as well, as currently my code for linking up to the second filter is stopping the first filter from working correctly. So clearly I'm doing it wrong.

So I have four dropdown filters, but I'll simplify it to two filters for this example. The filters are named name="county1" and name="development1" in their respective tags.

And then I'm using the following to access them:

{% set query = craft.request.getParam('county1') %}
{% set query = craft.request.getParam('development1') %}
{% set queryFilter = craft.categories.group('developments').search(query).order('title asc') %}

{% for category in queryFilter %}

....markup...

{% endfor %}

Can someone tell me what i need to do to fix this so that the filters don't interfere with each other?

Answer 1

If your goal is to filter by one drop-down value at a time then you could use an if statement to check if the passed value is set for each drop-down. This will only work if each drop-down has an option that is blank or it submits on select so that the other drop-down is not set.

{% set query = "" %}
{% if craft.request.getParam('country1') and 
      craft.request.getParam('country1') is not empty %}
    {% set query = craft.request.getParam('country1') %}
{% elseif craft.request.getParam('development1') and 
          craft.request.getParam('development1') is not empty %}
    {% set query = craft.request.getParam('development1') %}
{% endif %}

{% for category in queryFilter %}

....markup...

{% endfor %}