From bb513a23f4486e0529509ef7ac3d15bbb255daa5 Mon Sep 17 00:00:00 2001
From: Rob Austein <sra@hactrn.net>
Date: Thu, 6 Sep 2007 10:50:34 +0000
Subject: Checkpoint

svn path=/scripts/rpki/sql.py; revision=930
---
 scripts/rpki/sql.py | 38 +++++++++++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 9 deletions(-)

(limited to 'scripts/rpki/sql.py')

diff --git a/scripts/rpki/sql.py b/scripts/rpki/sql.py
index f0e2aa6d..9762f9ea 100644
--- a/scripts/rpki/sql.py
+++ b/scripts/rpki/sql.py
@@ -22,6 +22,16 @@ class sql_persistant(object):
   # objects are stored.
   sql_children = {}
 
+  ## @var sql_in_db
+  # Whether this object is already in SQL or not.  Perhaps this should
+  # instead be a None value in the object's ID field?
+  sql_in_db = False
+
+  ## @var sql_dirty
+  # Whether this object has been modified and needs to be written back
+  # to SQL.
+  sql_dirty = False
+
   @classmethod
   def sql_fetch(cls, db, **kwargs):
     """Fetch rows from SQL based on a canned query and a set of
@@ -34,26 +44,36 @@ class sql_persistant(object):
     """
 
     cur = db.cursor()
-    cur.execute(self.sql_fetch_cmd % kwargs)
+    cur.execute(self.sql_select_cmd % kwargs)
     rows = cur.fetchall()
     cur.close()
     objs = []
     for row in rows:
       obj = cls()
-      obj.sql_objectify(row)
+      obj.in_sql = True
+      obj.sql_objectify(*row)
       objs.append(obj)
       if isinstance(obj, sql_persistant):
         for kid in obj.sql_children:
           setattr(obj, obj.sql_children[kid], kid.sql_fetch(db))
     return objs
       
-  def sql_objectify(self, row):
+  def sql_objectify(self):
     """Initialize self with values returned by self.sql_fetch().
-
-    This method is also responsible for performing the
-    fetch/objectify() cycle on any of its children in the tree of
-    classes representing SQL tables in this database.  But I'm trying
-    to move that responsibility to self.sql_fetch()....    
     """
-
     raise NotImplementedError
+
+  def sql_store(self, db, cur=None):
+    """Save an object and its descendents to SQL.
+    """
+    if cur is None:
+      cur = db.cursor()
+    if not self.sql_in_db:
+      cur.execute(self.sql_insert_cmd % self.sql_makedict())
+    elif self.sql_dirty:
+      cur.execute(self.sql_update_cmd % self.sql_makedict())
+    self.sql_dirty = False
+    self.sql_in_db = True
+    for kids in self.sql_children.values():
+      for kid in getattr(self, kids):
+        kid.sql_store(db, cur)
-- 
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