title: Meilisearch filter returns nothing
body: <p>I have Meilisearch implemented in Docker using Python. I have tried to add a filter to the the search but I can not get it doesn't return any hits.</p>
  <pre><code>def create_meilisearch_indexes_document():
      client = meilisearch.Client(settings.MEILISEARCH_URL, settings.MEILISEARCH_MASTER_KEY)
      index = client.index(&quot;indexes&quot;)
      index.update_filterable_attributes([&quot;kingdom&quot;, &quot;group&quot;, &quot;klass&quot;, &quot;product&quot;])
      index.update(primary_key=&quot;pk&quot;)
  
  
  
  def update_meilisearch_indexes_document():
      client = meilisearch.Client(settings.MEILISEARCH_URL, settings.MEILISEARCH_MASTER_KEY)
  
      index = client.index(&quot;indexes&quot;)
      serialized_indexes = serializers.serialize(&quot;json&quot;, Index.objects.all())
      json_indexes = orjson.loads(serialized_indexes)
  
      index.add_documents(json_indexes)
  
  
  index.search(&quot;PORC&quot;, {&quot;filter&quot;: [&quot;product = 4c70238e-7fb4-4c14-8596-7de13bdd0f15&quot;]})
  
  output - {'hits': [], 'nbHits': 0, 'exhaustiveNbHits': False, 'query': 'PORC', 'limit': 20, 'offset': 0, 'processingTimeMs': 0}
  
  index.get_filterable_attributes()
  
  output - ['group', 'kingdom', 'klass', 'product']
  </code></pre>
  <p>I can't see why I'm not getting anything back. these values should return one result. Any help would be appericated.</p>