Replaced many smart_bytes by force_bytes

In all those occurrences, we didn't care about preserving the
lazy status of the strings, but we really wanted to obtain a
real bytestring.

django/core/cache/backends/db.py

@@ -12,7 +12,7 @@ from django.conf import settings
 from django.core.cache.backends.base import BaseCache
 from django.db import connections, router, transaction, DatabaseError
 from django.utils import timezone
-from django.utils.encoding import smart_bytes
+from django.utils.encoding import force_bytes
 
 
 class Options(object):
@@ -73,7 +73,7 @@ class DatabaseCache(BaseDatabaseCache):
             transaction.commit_unless_managed(using=db)
             return default
         value = connections[db].ops.process_clob(row[1])
-        return pickle.loads(base64.b64decode(smart_bytes(value)))
+        return pickle.loads(base64.b64decode(force_bytes(value)))
 
     def set(self, key, value, timeout=None, version=None):
         key = self.make_key(key, version=version)

django/core/cache/backends/filebased.py

@@ -10,7 +10,7 @@ except ImportError:
     import pickle
 
 from django.core.cache.backends.base import BaseCache
-from django.utils.encoding import smart_bytes
+from django.utils.encoding import force_bytes
 
 class FileBasedCache(BaseCache):
     def __init__(self, dir, params):
@@ -137,7 +137,7 @@ class FileBasedCache(BaseCache):
         Thus, a cache key of "foo" gets turnned into a file named
         ``{cache-dir}ac/bd/18db4cc2f85cedef654fccc4a4d8``.
         """
-        path = hashlib.md5(smart_bytes(key)).hexdigest()
+        path = hashlib.md5(force_bytes(key)).hexdigest()
         path = os.path.join(path[:2], path[2:4], path[4:])
         return os.path.join(self._dir, path)
 

django/core/files/base.py

@@ -3,7 +3,7 @@ from __future__ import unicode_literals
 import os
 from io import BytesIO, UnsupportedOperation
 
-from django.utils.encoding import smart_bytes, smart_text
+from django.utils.encoding import smart_text
 from django.core.files.utils import FileProxyMixin
 from django.utils.encoding import python_2_unicode_compatible
 

django/core/serializers/json.py

@@ -12,7 +12,6 @@ import json
 from django.core.serializers.base import DeserializationError
 from django.core.serializers.python import Serializer as PythonSerializer
 from django.core.serializers.python import Deserializer as PythonDeserializer
-from django.utils.encoding import smart_bytes
 from django.utils import six
 from django.utils.timezone import is_aware
 

django/core/serializers/pyyaml.py

@@ -12,7 +12,6 @@ from django.db import models
 from django.core.serializers.base import DeserializationError
 from django.core.serializers.python import Serializer as PythonSerializer
 from django.core.serializers.python import Deserializer as PythonDeserializer
-from django.utils.encoding import smart_bytes
 from django.utils import six