- # Fetch a new nodenetwork_id if necessary
- if 'nodenetwork_id' not in self:
- rows = self.api.db.selectall("SELECT NEXTVAL('nodenetworks_nodenetwork_id_seq') AS nodenetwork_id")
- if not rows:
- raise PLCDBError("Unable to fetch new nodenetwork_id")
- self['nodenetwork_id'] = rows[0]['nodenetwork_id']
- insert = True
- else:
- insert = False
-
- # Filter out fields that cannot be set or updated directly
- fields = dict(filter(lambda (key, value): key in self.fields,
- self.items()))
-
- # Parameterize for safety
- keys = fields.keys()
- values = [self.api.db.param(key, value) for (key, value) in fields.items()]
-
- if insert:
- # Insert new row in nodenetworks table
- sql = "INSERT INTO nodenetworks (%s) VALUES (%s)" % \
- (", ".join(keys), ", ".join(values))
- else:
- # Update existing row in sites table
- columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
- sql = "UPDATE nodenetworks SET " + \
- ", ".join(columns) + \
- " WHERE nodenetwork_id = %(nodenetwork_id)d"
-
- self.api.db.do(sql, fields)
-
- if commit:
- self.api.db.commit()
-
- def delete(self, commit = True):
- """
- Delete existing nodenetwork.
- """
-
- assert 'nodenetwork_id' in self
-
- # Delete ourself
- for table in ['node_nodenetworks', 'nodenetworks']:
- self.api.db.do("DELETE FROM %s" \
- " WHERE nodenetwork_id = %d" % \
- (table, self['nodenetwork_id']))
-
- if commit:
- self.api.db.commit()
-