old_contents: HAYSTACK_SITECONF = 'wheelcms_axle.search_sites'
  
  HAYSTACK_SEARCH_ENGINE = "solr"
  
  HAYSTACK_SOLR_URL = 'http://127.0.0.1:8983/solr'
  HAYSTACK_INCLUDE_SPELLING = True
  
  # 2.x config
  #HAYSTACK_CONNECTIONS = {
  #
  #    'default': {
  #        'ENGINE': 'haystack.backends.solr_backend.SolrEngine',
  #        'URL': 'http://127.0.0.1:8983/solr'
  #        # ...or for multicore...
  #        # 'URL': 'http://127.0.0.1:8983/solr/mysite',
  #    },
  #}
  
new_contents: from .util import get_env_variable
  
  HAYSTACK_SITECONF = 'wheelcms_axle.search_sites'
  
  HAYSTACK_SEARCH_ENGINE = "solr"
  
  HAYSTACK_SOLR_URL = get_env_variable('SOLR_URL', 'http://127.0.0.1:8983/solr')
  HAYSTACK_INCLUDE_SPELLING = True
  
  # 2.x config
  #HAYSTACK_CONNECTIONS = {
  #
  #    'default': {
  #        'ENGINE': 'haystack.backends.solr_backend.SolrEngine',
  #        'URL': 'http://127.0.0.1:8983/solr'
  #        # ...or for multicore...
  #        # 'URL': 'http://127.0.0.1:8983/solr/mysite',
  #    },
  #}
  
subject: make solr url configurable through env