#777 Properties registered using default values cannot be viewed by other clients

[Martin Mohan]

If I register a program using default jive property it is not viewable from several programs. (excluding astor).
E.g. I register 2 instances of device simulator using jive 4.3.1. Simulator has one property called DeviceNr (default value=1)
test/simulator/default 1 (default)
test/simulator/rampx2 2 (modified)

python

import PyTango
db=PyTango.Database()

deviceName="test/simulator/default"
print ("%s"%db.get_device_property_list(deviceName,"*").value_string)
[]

deviceName="test/simulator/rampx2"
print ("%s"%db.get_device_property_list(deviceName,"*").value_string)
['DeviceNr']

or
jive -> tab->device
test->simulator->default->properties []
test->simulator->rampx2->properties [DeviceNr][2]

[Emmanuel Taurel]

Hi Martin

Within Tango, the definition of default property is a property with its value hard coded in the Tango class and therefore not stored in the database. The reason of this feature is to ease Tango
device server installation. Imagine you have the same Tango class with several tens of devices. It could be tedious and error-prone to enter in database the property value for all these devices. Using a property default value, you don't have anything to do (except case where for some devices you need the property to have a vlue different than the default)
Nevertheless, because the default value is not stored in the database, it is not easy for other software than the Tango class to get this default value. When the device server is running and using the
admin device command, it is possible to get this default value and this is what the device wizard is doing.

To summarize, I do not really consider this as a bug but rather as a feature request to make property default value (when defined) more easily accesible than what it is nowadays.
You are welcome to create a feature request for this.

Regards

Emmanuel

[Martin Mohan]

Hi Emmanuel,
Ok I would like to put this as a feature request but for feature request
"Create Ticket" is greyed out in sourceforge.
Hovering over "Create Ticket" shows "To create a new ticket, you must be
authorized by project admin".

On 23/02/16 08:09, Emmanuel Taurel wrote:

Hi Martin

Within Tango, the definition of default property is a property with
its value hard coded in the Tango class and therefore not stored in
the database. The reason of this feature is to ease Tango
device server installation. Imagine you have the same Tango class with
several tens of devices. It could be tedious and error-prone to enter
in database the property value for all these devices. Using a property
default value, you don't have anything to do (except case where for
some devices you need the property to have a vlue different than the
default)
Nevertheless, because the default value is not stored in the database,
it is not easy for other software than the Tango class to get this
default value. When the device server is running and using the
admin device command, it is possible to get this default value and
this is what the device wizard is doing.

To summarize, I do not really consider this as a bug but rather as a
feature request to make property default value (when defined) more
easily accesible than what it is nowadays.
You are welcome to create a feature request for this.

Regards

Emmanuel

---

[bugs:#777] http://sourceforge.net/p/tango-cs/bugs/777/ Properties
registered using default values cannot be viewed by other clients

Status: open
Created: Mon Feb 22, 2016 01:29 PM UTC by Martin Mohan
Last Updated: Mon Feb 22, 2016 01:29 PM UTC
Owner: nobody

If I register a program using default jive property it is not viewable
from several programs. (excluding astor).
E.g. I register 2 instances of device simulator using jive 4.3.1.
Simulator has one property called DeviceNr (default value=1)
test/simulator/default 1 (default)
test/simulator/rampx2 2 (modified)

python

        import PyTango
        db=PyTango.Database()

        deviceName="test/simulator/default"
        print
        ("%s"%db.get_device_property_list(deviceName,"*").value_string)
        []

        deviceName="test/simulator/rampx2"
        print
        ("%s"%db.get_device_property_list(deviceName,"*").value_string)
        ['DeviceNr']

or
jive -> tab->device
test->simulator->default->properties []
test->simulator->rampx2->properties [DeviceNr][2]

---

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[Martin Mohan]

I managed to create a feature request #121 Make a property default value (when defined) more easily accessible.
Could you close this bug report.
Thanks.