title: filter on django-import-export
body: <p>I want to create csv file form my model send a dictionary of Queries (  filter exclude ) to <a href="https://github.com/bmihelac/django-import-export">django-import-export</a> and return data from my model.</p>
  
  <p>using flowing code i have all of model fields but i need to filter them with a query.</p>
  
  <pre><code>from import_export import resources
  from finance.models import Price
  
  class ExportData(resources.ModelResource):
  
      class Meta:
          model = Price
  </code></pre>