Merge pull request #4411 from artragis/fix_migrate

fix manage.py

manage.py

@@ -1,15 +1,35 @@
 import os
 import sys
 
+
+def patch_create_suffix(original):
+    """
+    Patch mysql creation policy to handle the "utf8mb4" facility. This appears tricky but it's necessary
+    due to the conception of "extended utf-8" in mysql. If we do not patch, the mysql backend cannot index
+    ``VARCHAR(255)`` fields !
+    see <http://bd808.com/blog/2017/04/17/making-django-migrations-that-work-with-mysql-55-and-utf8mb4/>
+    for explanations
+
+    :param original: the original function we are patching
+    :return: the patched function
+    """
+    def patch(self):
+        return original(self) + ' ROW_FORMAT=DYNAMIC'
+    return patch
+
+
 if __name__ == '__main__':
     os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'zds.settings')
 
-    from zds.settings import DATABASES
+    if len(sys.argv) > 1 and sys.argv[1] in ['migrate', 'test']:
 
-    if DATABASES['default']['ENGINE'] == 'django.db.backends.mysql':
+        from django.db.backends.mysql.creation import BaseDatabaseCreation
+
+        BaseDatabaseCreation.sql_table_creation_suffix = \
+            patch_create_suffix(BaseDatabaseCreation.sql_table_creation_suffix)
         from django.db.backends.mysql.schema import DatabaseSchemaEditor
-        DatabaseSchemaEditor.sql_create_table += ' ROW_FORMAT=DYNAMIC'
 
+        DatabaseSchemaEditor.sql_create_table += ' ROW_FORMAT=DYNAMIC'
     from django.core.management import execute_from_command_line
 
     execute_from_command_line(sys.argv)