General code tidying for this Oracle fix.

pokedex/db/__init__.py

@@ -25,7 +25,7 @@ def connect(uri=None, session_args={}, engine_args={}, engine_prefix=''):
     if uri is None:
         uri = get_default_db_uri()
 
-    ### Do some fixery for MySQL
+    ### Do some fixery for specific RDBMSes
     if uri.startswith('mysql:'):
         # MySQL uses latin1 for connections by default even if the server is
         # otherwise oozing with utf8; charset fixes this
@@ -37,9 +37,7 @@ def connect(uri=None, session_args={}, engine_args={}, engine_prefix=''):
         for table in metadata.tables.values():
             table.kwargs['mysql_engine'] = 'InnoDB'
             table.kwargs['mysql_charset'] = 'utf8'
-
-    ### Do some fixery for Oracle
-    if uri.startswith('oracle:') or uri.startswith('oracle+cx_oracle:'):
+    elif uri.startswith(('oracle:', 'oracle+cx_oracle:')):
         # Oracle requires auto_setinputsizes=False (or at least a special
         # set of exclusions from it, which I don't know)
         if 'auto_setinputsizes' not in uri:

pokedex/db/load.py

@@ -139,19 +139,16 @@ def load(session, tables=[], directory=None, drop_tables=False, verbose=False, s
     table_names = _get_table_names(metadata, tables)
     table_objs = [metadata.tables[name] for name in table_names]
 
-    # Oracle fixery, load needs short names
-    # flag for oracle stuff
-    oranames = (session.connection().dialect.name == 'oracle')
-    if oranames:
-        # Shorten table names, Oracle limits table and column names to 30 chars
-        # Make a dictionary to match old<->new names
-        oradict = rewrite_long_table_names()
-                
     if recursive:
         table_objs.extend(find_dependent_tables(table_objs))
 
     table_objs = sqlalchemy.sql.util.sort_tables(table_objs)
 
+    # Limit table names to 30 characters for Oracle
+    oracle = (session.connection().dialect.name == 'oracle')
+    if oracle:
+        rewrite_long_table_names()
+
     # SQLite speed tweaks
     if not safe and session.connection().dialect.name == 'sqlite':
         session.connection().execute("PRAGMA synchronous=OFF")
@@ -186,15 +183,17 @@ def load(session, tables=[], directory=None, drop_tables=False, verbose=False, s
 
     # Okay, run through the tables and actually load the data now
     for table_obj in table_objs:
+        if oracle:
+            table_name = table_obj._original_name
+        else:
             table_name = table_obj.name
+
         insert_stmt = table_obj.insert()
 
         print_start(table_name)
+
         try:
             csvpath = "%s/%s.csv" % (directory, table_name)
-            # In oracle mode, use the original names instead of current
-            if oranames:
-                csvpath = "%s/%s.csv" % (directory, oradict[table_name])    
             csvfile = open(csvpath, 'rb')
         except IOError:
             # File doesn't exist; don't load anything!
@@ -380,22 +379,23 @@ def dump(session, tables=[], directory=None, verbose=False, langs=['en']):
     table_names = _get_table_names(metadata, tables)
     table_names.sort()
 
-    # Oracle fixery : read from short table names, dump long names
-    oranames = (session.connection().dialect.name == 'oracle')
-    if oranames:
-        # Make a dictionary to match old<->new names
-        oradict = rewrite_long_table_names()
+    # Oracle needs to dump from tables with shortened names to csvs with the
+    # usual names
+    oracle = (session.connection().dialect.name == 'oracle')
+    if oracle:
+        rewrite_long_table_names()
 
     for table_name in table_names:
         print_start(table_name)
         table = metadata.tables[table_name]
 
-        writer = csv.writer(open("%s/%s.csv" % (directory, table_name), 'wb'),
-                            lineterminator='\n')
-        # In oracle mode, use the original names instead of current
-        if oranames:
-            writer = csv.writer(open("%s/%s.csv" % (directory, oradict[table_name]), 'wb'),
-                            lineterminator='\n')
+        if oracle:
+            filename = '%s/%s.csv' % (directory, table._original_name)
+        else:
+            filename = '%s/%s.csv' % (directory, table_name)
+
+        writer = csv.writer(open(filename, 'wb'), lineterminator='\n')
+
         columns = [col.name for col in table.columns]
 
         # For name tables, dump rows for official languages, as well as

pokedex/db/oracle.py

@@ -8,34 +8,19 @@ def rewrite_long_table_names():
     Returns a dictionary matching short names -> long names.
     """
 
-    # Load table names from metadata
-    t_names = metadata.tables.keys()
-
-    table_names = list(t_names)
-    table_objs = [metadata.tables[name] for name in table_names]
-
-    # Prepare a dictionary to match old<->new names
-    dictionary = {}
+    # Load tables from metadata
+    table_objs = metadata.tables.values()
 
     # Shorten table names, Oracle limits table and column names to 30 chars
     for table in table_objs:
-        table._orginal_name = table.name[:]
-        dictionary[table.name]=table._orginal_name
-        if len(table._orginal_name) > 30:
-            for letter in ['a', 'e', 'i', 'o', 'u', 'y']:
-                table.name=table.name.replace(letter,'')
-            dictionary[table.name]=table._orginal_name
-    return dictionary
+        table._original_name = table.name
 
+        if len(table.name) > 30:
+            for letter in 'aeiouy':
+                table.name = table.name.replace(letter, '')
 
-def restore_long_table_names(metadata,dictionary):
-    """Modifies the table names to restore the long-naming.
-
-    `metadata`
-        The metadata to restore.
-
-    `dictionary`
-        The dictionary matching short name -> long name.
-    """
+def restore_long_table_names():
+    """Modifies the table names to restore the long-naming."""
     for table in metadata.tables.values():
-        table.name = dictionary[table.name]
+        table.name = table._original_name
+        del table._original_name