move ddlevents dispatch to SchemaItem; "before_parent_attach", "after_parent_attach" to all SchemaItem classes; replace column._on_table_attach with event

[Mike Bayer]

No description provided.

[Mike Bayer]

then update the recipe at http://www.sqlalchemy.org/trac/wiki/UsageRecipes/NamingConventions to use the events. Remove the usage of Column subclasses:

def pk_col(**kw):
    kw['primary_key']('primary_key') = True
    col = Column(Integer, **kw)

    def parent_attach(schema_item, parent):
        schema_item.name = '%s_id' % parent.name
        schema_item.doc = "Primary key column for %r" % parent.name

    event.listen(col, 'before_parent_attach', parent_attach)
    return col

[Mike Bayer]

--- a/lib/sqlalchemy/schema.py  Sun Jan 30 15:08:41 2011 -0500
+++ b/lib/sqlalchemy/schema.py  Sun Jan 30 18:24:35 2011 -0500
@@ -66,6 +66,11 @@

         raise NotImplementedError()

+    def _set_parent_with_dispatch(self, parent):
+        self.dispatch.before_parent_attach(self.parent)
+        self._set_parent(parent)
+        self.dispatch.after_parent_attach(self.parent)
+
     def get_children(self, **kwargs):
         """used to allow SchemaVisitor access"""
         return []

[Mike Bayer]

those should be commas, i.e. "self, parent"

[Mike Bayer]

this is in 12073e281eebdece0fe4e24c6704d57eafdc9247. Still need to update the wiki page.

[Mike Bayer]

ok the wiki's done, don't care about the 'init' event for now.

[Mike Bayer]

Removing milestone: 0.7.0 (automated comment)