code: def indexer_receiver(sender, json=None, record=None, index=None,
                       **dummy_kwargs):
      
      if index and index.startswith('grants-'):
          # Generate suggest field
          suggestions = [
              json.get('code'),
              json.get('acronym'),
              json.get('title')
          ]
          json['suggest'] = {
              'input': [s for s in suggestions if s],
              'output': json['title'],
              'context': {
                  'funder': [json['funder']['doi']]
              },
              'payload': {
                  'id': json['internal_id'],
                  'legacy_id': (json['code'] if json.get('program') == 'FP7'
                                else json['internal_id']),
                  'code': json['code'],
                  'title': json['title'],
                  'acronym': json.get('acronym'),
                  'program': json.get('program'),
              },
          }
      elif index and index.startswith('funders-'):
          # Generate suggest field
          suggestions = json.get('acronyms', []) + [json.get('name')]
          json['suggest'] = {
              'input': [s for s in suggestions if s],
              'output': json['name'],
              'payload': {
                  'id': json['doi']
              },
          }
docs: Connect to before_record_index signal to transform record for ES.