more tests

Author: sinisaos

piccolo/query/methods/alter.py

@@ -84,13 +84,13 @@ class RenameColumnMysql(AlterColumnStatement):
 
     @property
     def ddl(self) -> str:
-        if not isinstance(self.column, Column):
+        if isinstance(self.column, str):
             raise ValueError("MySQL requires a column instance for renaming.")
-        col_type = self.column.column_type
+        column_type = self.column.column_type
         null_sql = "NULL" if self.column._meta.null else "NOT NULL"
         return (
             f"CHANGE `{self.column_name}` `{self.new_name}` "
-            f"{col_type} {null_sql}"
+            f"{column_type} {null_sql}"
         )
 
 

piccolo/query/methods/create_index.py

@@ -82,9 +82,7 @@ def mysql_ddl(self) -> Sequence[str]:
         tablename = self.table._meta.get_formatted_tablename()
 
         column_names_str = ", ".join([f"`{i}`" for i in self.column_names])
+        prefix = "CREATE INDEX"
         return [
-            (
-                f"{self.prefix} {index_name} ON {tablename} "
-                f"({column_names_str})"
-            )
+            f"{prefix} {index_name} ON {tablename} " f"({column_names_str})"
         ]