kfet -- Init KFetConfig, even without request, for easy testing

kfet/config.py

@@ -1,25 +1,39 @@
 from django.core.exceptions import ValidationError
 from django.db import models
 
-from djconfig import config
+import djconfig
 
 
 class KFetConfig(object):
     """kfet app configuration.
 
     Enhance isolation with backend used to store config.
-    Usable after DjConfig middleware was called.
 
     """
     prefix = 'kfet_'
 
+    def __init__(self):
+        # Set this to False again to reload the config, e.g for testing
+        # purposes.
+        self._conf_init = False
+
+    def _check_init(self):
+        # For initialization purposes, we call 'reload_maybe' directly
+        # (normaly done once per request in middleware).
+        # Note it should be called only once across requests, if you use
+        # kfet_config instance below.
+        if not self._conf_init:
+            djconfig.reload_maybe()
+            self._conf_init = True
+
     def __getattr__(self, key):
+        self._check_init()
         if key == 'subvention_cof':
             # Allows accessing to the reduction as a subvention
             # Other reason: backward compatibility
             reduction_mult = 1 - self.reduction_cof/100
             return (1/reduction_mult - 1) * 100
-        return getattr(config, self._get_dj_key(key))
+        return getattr(djconfig.config, self._get_dj_key(key))
 
     def list(self):
         """Get list of kfet app configuration.
@@ -30,7 +44,8 @@ class KFetConfig(object):
         """
         # prevent circular imports
         from kfet.forms import KFetConfigForm
-        return [(field.label, getattr(config, name), )
+        self._check_init()
+        return [(field.label, getattr(djconfig.config, name), )
                 for name, field in KFetConfigForm.base_fields.items()]
 
     def _get_dj_key(self, key):
@@ -47,6 +62,7 @@ class KFetConfig(object):
         # prevent circular imports
         from kfet.forms import KFetConfigForm
 
+        self._check_init()
         # get old config
         new_cfg = KFetConfigForm().initial
         # update to new config