add a organization table (addresses #40)

* development.ini:
  - change testing database to PostgreSQL
  - set required database version to 4
 * data/dbrepo/versions/004_Add_organization_table.py:
  - create/drop organization table
  - add organizationid foreign key reference to client table
 * gnuviechadmin/backend/tables.py:
  - add reflected organization_table

data/dbrepo/versions/004_Add_organization_table.py

@@ -0,0 +1,29 @@
+from sqlalchemy import MetaData, Table, Column, Integer, Unicode, ForeignKey
+from migrate import migrate_engine
+from migrate.changeset.schema import create_column
+from gnuviechadmin.config import config
+
+dbschema = None
+if 'database.schema' in config:
+    dbschema = config['database.schema']
+
+meta = MetaData(migrate_engine)
+client = Table('client', meta, schema = dbschema, autoload = True)
+organization = Table(
+    'organization', meta,
+    Column('organizationid', Integer, primary_key = True),
+    Column('name', Unicode(200), nullable = False, unique = True),
+    schema = dbschema,
+    useexisting = True)
+
+def upgrade():
+    organization.create()
+    col = Column('organizationid', Integer,
+                 ForeignKey(organization.c.organizationid),
+                 nullable = True)
+    create_column(col, client)
+
+
+def downgrade():
+    client.c.organizationid.drop()
+    organization.drop()

development.ini

@@ -12,11 +12,11 @@ use = egg:gnuviechadmin#cli
 # sqlalchemy. The default is an sqlite in memory database which is not
 # very usable for a real installation.
 #
-sqlalchemy.uri = sqlite:///%(here)s/gva.db
+sqlalchemy.uri = postgres://localhost/gvatest
 sqlalchemy.echo = false
 
 database.repository = %(here)s/data/dbrepo
-migrate.required_version = 3
+migrate.required_version = 4
 templatedir = %(here)s/data/templates
 mailtemplates = %(templatedir)s/mails
 

gnuviechadmin/backend/tables.py

@@ -19,7 +19,7 @@
 #
 # Version: $Id$
 
-from sqlalchemy import MetaData, Table
+from sqlalchemy import MetaData, Table, Column, Unicode
 from sqlalchemy.orm import mapper, relation
 from sqlalchemy.exceptions import NoSuchTableError
 import sys
@@ -69,6 +69,11 @@ Trying automatic versioning.""")
     if 'database.schema' in config:
         dbschema = config['database.schema']
 
+    organization_table = Table(
+        'organization', meta,
+        Column('name', Unicode(200)),
+        schema = dbschema, autoload = True)
+    
     (client_table, sysuser_table, domain_table, \
          record_table, supermaster_table, mailaccount_table, \
          mailaddress_table, mailtarget_table) = \