Changes have been made in Git (master):

commit a93f51abc4f6b9d99027b1b9ef57cf5dea6b418e
Author: Ralf Lang <lang@b1-systems.de>
Date:   Wed Nov 28 14:54:54 2012 +0200

     Patch by PUNkER fixes [#11574] postgres compatibility for 
sesha/lib/Driver/Rdo.php when adding properties.

  sesha/lib/Driver/Rdo.php            |    3 +++
  sesha/lib/Entity/PropertyMapper.php |    3 +++
  2 files changed, 6 insertions(+), 0 deletions(-)

http://git.horde.org/horde-git/-/commit/a93f51abc4f6b9d99027b1b9ef57cf5dea6b418e

(10:19:30) PUNkER: guys, seems i found bug in sesha: when it running 
with Postres, it don't create properties and categories throwing sql 
error
(10:20:46) PUNkER: because it's trying to insert NULL in property_id 
which is NOT NULL
(10:20:56) PUNkER: constraint
(10:33:24) blackcat73 [~Blackcat@adonis.iportalmais.pt] hat den Raum betreten.
(10:35:52) lang-b1s: PUNkER: which version of sesha are you testing?
(10:37:35) PUNkER: lang-b1s: latest from pear
(10:37:42) PUNkER: 1.0.0beta1
(10:38:38) lang-b1s: PUNkER: this version won't run against the latest 
horde - against which version are you testing this?
(10:39:08) PUNkER: yeah, it's not beta1 =)
(10:39:30) PUNkER: actually i just cloned git repository and made a 
package and then installed by pera
(10:39:38) PUNkER: pera=  pear
(10:40:28) lang-b1s: great. can you please show me the structure of 
the sesha tables in postgres? do they have an autoincrement?
(10:40:39) PUNkER: yes
(10:41:04) PUNkER:  property_id | integer                | NOT NULL 
DEFAULT nextval('sesha_properties_property_id_seq'::regclass)
(10:41:04) PUNkER:  property    | character varying(256) |
(10:41:04) PUNkER:  datatype    | character varying(128) | NOT NULL DEFAULT 0
(10:41:04) PUNkER:  parameters  | text                   |
(10:41:04) PUNkER:  unit        | character varying(32)  |
(10:41:06) PUNkER:  description | text                   |
(10:41:08) PUNkER:  priority    | integer                | NOT NULL DEFAULT 0
(10:42:12) PUNkER: but it's not possible to explicitly insert NULL in 
property_id
(10:42:22) PUNkER: as backend does
(10:43:04) PUNkER: i little modified php classes but i'm not sure it's 
right by design
(10:43:39) lang-b1s: PUNkER: I'm very interested in your 
modifications. where did you make changes? Db? Rdo? The Driver_Rdo ?
(10:46:29) PUNkER: lib/Driver/Rdo.php - addCategory($info)
(10:46:53) PUNkER: lib/Entity/PropertyMapper.php - create(array $property)
(10:47:09) PUNkER: if(array_key_exists('property_id', $property)
(10:47:09) PUNkER:                 && $property['property_id'] == null)
(10:47:09) PUNkER:                 unset($property['property_id']);
(10:47:39) PUNkER: same thing in Rdo.php
(10:51:01) lang-b1s: can you create a ticket and apply a patch? I'd 
review the changes.
(10:51:18) lang-b1s: thank you so far...
(10:56:40) PUNkER: ok, i'll do in near time
(10:57:58) PUNkER: can i also create tickets with enhancement suggestions ?
(11:06:58) PUNkER: <lang-b1s>, can you please tell me what 'Unit' 
field of property stand for ?
(11:15:32) lang-b1s: enhancements probably won't go into the version 
released now but implemented later
(11:16:18) lang-b1s: unit is the field where you can say how the item 
is measured. hardware is in pieces, liquids in volume (liters etc), 
sand is in kilogramms etc
(11:35:43) PUNkER: ah, thnx
(11:43:49) lang-b1s: in other words, yes, create enhancement tickets, 
but the focus of the current beta is "first release as is, bugfixed"
(12:22:29) PUNkER: ok, i understood

Punker has provided a preliminary patch