Hi everybody,
last week some friends started to think about a viable solution to
implement a SssS infrastructure to develop our applications on and
give the final users the power to customize every aspect of the
application (objects, properties, relations, processes and workflows)
... One of the options we were thinking to develop (and opensource it)
is an idea that was based on mysql's information_schema (well kind of)
and "reverse engineering" on SalesForce.com, and it's something like
this:
CREATE TABLE `OBJECTS` (
`OBJECT_ID` int(20) NOT NULL,
`OBJECT_TABLE` varchar(200) NOT NULL,
`OBJECT_SINGULAR_NAME` varchar(200) NOT NULL,
`OBJECT_PLURAL_NAME` varchar(200) NOT NULL,
`OBJECT_DESCRIPTION` text NOT NULL,
`OBJECT_CUSTOMIZABLE` tinyint(1) NOT NULL,
`OBJECT_CREATED_BY` int(20) NOT NULL,
`OBJECT_CREATED_ON` datetime NOT NULL default '0000-00-00 00:00:00',
`OBJECT_MODIFIED_BY` int(20) NOT NULL,
`OBJECT_MODIFIED_ON` datetime NOT NULL default '0000-00-00 00:00:00',
`OBJECT_REMOVED_BY` int(20) NOT NULL,
`OBJECT_REMOVED_ON` datetime NOT NULL default '0000-00-00 00:00:00',
PRIMARY KEY (`OBJECT_ID`)
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_PROPERTIES` (
`OBJECT_ID` int(20) NOT NULL,
`OBJECT_PROPERTY_ID` int(20) NOT NULL,
`OBJECT_PROPERTY_COLUMN` varchar(200) NOT NULL,
`OBJECT_PROPERTY_SINGULAR_NAME` varchar(200) NOT NULL,
`OBJECT_PROPERTY_PLURAL_NAME` varchar(200) NOT NULL,
`OBJECT_PROPERTY_DESCRIPTION` text NOT NULL,
`OBJECT_PROPERTY_DATA_TYPE` varchar(20) NOT NULL,
`OBJECT_PROPERTY_DATA_LENGTH` varchar(20) NOT NULL,
`OBJECT_PROPERTY_DATA_PRECISION` varchar(20) NOT NULL,
`OBJECT_PROPERTY_DATA_VALUE` varchar(20) NOT NULL,
`OBJECT_PROPERTY_CUSTOMIZABLE` tinyint(1) NOT NULL,
`OBJECT_PROPERTY_NULLABLE` tinyint(1) NOT NULL,
`OBJECT_PROPERTY_POSITION` int(20) NOT NULL,
`OBJECT_PROPERTY_CREATED_BY` int(20) NOT NULL,
`OBJECT_PROPERTY_CREATED_ON` datetime NOT NULL default '0000-00-00
00:00:00',
`OBJECT_PROPERTY_MODIFIED_BY` int(20) NOT NULL,
`OBJECT_PROPERTY_MODIFIED_ON` datetime NOT NULL default '0000-00-00
00:00:00',
`OBJECT_PROPERTY_REMOVED_BY` int(20) NOT NULL,
`OBJECT_PROPERTY_REMOVED_ON` datetime NOT NULL default '0000-00-00 00:00:00'
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_RELATIONS` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_TRIGGERS` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_PROPERTIES_VALIDATIONS` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_RELATIONS_VALIDATIONS` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_PERMISSIONS` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_PROPERTIES_PERMISSIONS` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
CREATE TABLE `OBJECTS_RELATIONS_PERMISSIONS` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
And when I a user customizes, the system would record the metadata
regarding the customization, for example let's add a person object,
the system would insert a row in OBJECTS table with the following query:
INSERT INTO `OBJECTS` VALUES ('1','TB00001','Person','People','This
object represents a real person','1','1','2008-10-01
00:00:00','0','0000-00-00 00:00:00','1','0000-00-00 00:00:00');
And right after that:
CREATE TABLE `TB00001` (
) ENGINE=InnoDB DEFAULT CHARSET=Utf8;
And the next step woudl be to add some properties to the next object
INSERT INTO `OBJECTS` VALUES ('1','1','CL0000100001','ID','ID','Auto
increment
identification','INTEGER','20','0','NULL','AUTO_INCREMENT()','0','0','1','1','2008-10-01 00:00:00','0','0000-00-00 00:00:00','1','0000-00-00
00:00:00');
INSERT INTO `OBJECTS` VALUES ('1','2','CL0000100002','Nick name','Nick
names','The nick of a
person','VARCHAR','20','0','','','0','0','2','1','2008-10-01
00:00:00','0','0000-00-00 00:00:00','1','0000-00-00 00:00:00');
INSERT INTO `OBJECTS` VALUES ('1','3','CL0000100003','First
name','First names','The name of a
person','VARCHAR','200','0','','','0','0','3','1','2008-10-01
00:00:00','0','0000-00-00 00:00:00','1','0000-00-00 00:00:00');
INSERT INTO `OBJECTS` VALUES ('1','4','CL0000100004','Middle
name','Middle names','The middle name of a
person','VARCHAR','200','0','','','0','0','4','1','2008-10-01
00:00:00','0','0000-00-00 00:00:00','1','0000-00-00 00:00:00');
INSERT INTO `OBJECTS` VALUES ('1','5','CL0000100005','Last name','Last
names','The family name of a
person','VARCHAR','200','0','','','0','0','5','1','2008-10-01
00:00:00','0','0000-00-00 00:00:00','1','0000-00-00 00:00:00');
What would be followed by (a trigger perheaps or the application it
self) the queries:
ALTER TABLE `TB00001` ADD `CL0000100001` INTEGER(20) NOT NULL DEFAULT
NULL AUTO_INCREMENT;
ALTER TABLE `TB00001` ADD `CL0000100002` VARCHAR(20) NOT NULL DEFAULT
'' AFTER `CL0000100001`;
ALTER TABLE `TB00001` ADD `CL0000100003` VARCHAR(200) NOT NULL DEFAULT
'' AFTER `CL0000100003`;
ALTER TABLE `TB00001` ADD `CL0000100004` VARCHAR(200) NOT NULL DEFAULT
'' AFTER `CL0000100004`;
ALTER TABLE `TB00001` ADD `CL0000100005` VARCHAR(200) NOT NULL DEFAULT
'' AFTER `CL0000100005`;
And the same would work for relations, validations, processes and
workflows... And the business objects (for example Java, PHP or
Python) would be or generated on instantiation or static build when
needed.
Anyone even implemented some thing like that? Is there any production
experience? Seams that Microsoft Dynamics works like that (but with
the metadata description stored in XML). Me and my friends were
thingking about going futer with the development... Any one willing to
help this little project?
Best Regards,
Bruno B. B. Magalhães
Sócio-Diretor de Negócios e Tecnologia
BLACKBEAN CONSULTORIA
Rua Real Grandeza 193/210, Botafogo
Rio de Janeiro, RJ, 22281-035, Brasil
+55 (21) 9996-1093
+55 (21) 2266-0597
www.blackbean.com.br
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