Currency: Use ExchangeRateHost backend by default, rather than fixer.io

- No longer support fixer.io as it requires an API key and does not support "base" currency

InvenTree/InvenTree/tasks.py

@@ -169,18 +169,12 @@ def update_exchange_rates():
     try:
         import common.models
         from django.conf import settings
-        from djmoney.contrib.exchange.backends import FixerBackend
+        from InvenTree.exchange import ExchangeRateHostBackend
     except AppRegistryNotReady:
         # Apps not yet loaded!
         return
 
-    fixer_api_key = common.models.InvenTreeSetting.get_setting('INVENTREE_FIXER_API_KEY', '').strip()
-
-    if not fixer_api_key:
-        # API key not provided
-        return
-
-    backend = FixerBackend(access_key=fixer_api_key)
+    backend = ExchangeRateHostBackend()
 
     currencies = ','.join(settings.CURRENCIES)
 

InvenTree/common/models.py

@@ -87,12 +87,6 @@ class InvenTreeSetting(models.Model):
             'choices': djmoney.settings.CURRENCY_CHOICES,
         },
 
-        'INVENTREE_FIXER_API_KEY': {
-            'name': _('fixer.io API key'),
-            'description': _('API key for fixer.io currency conversion service'),
-            'default': '',
-        },
-
         'INVENTREE_DOWNLOAD_FROM_URL': {
             'name': _('Download from URL'),
             'description': _('Allow download of remote images and files from external URL'),

InvenTree/templates/InvenTree/settings/global.html

@@ -20,7 +20,6 @@
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_BASE_URL" icon="fa-globe" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_COMPANY_NAME" icon="fa-building" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_DEFAULT_CURRENCY" icon="fa-dollar-sign" %}
-        {% include "InvenTree/settings/setting.html" with key="INVENTREE_FIXER_API_KEY" icon="fa-key" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_DOWNLOAD_FROM_URL" icon="fa-cloud-download-alt" %}
     </tbody>
 </table>