REST API: char and array parameter problem

General Development
1

Hello tangoer.

because JSON has not char data type, i want to execute DevVarCharArray command, how to set input value, [48,49,50] or ["0","1","2"] all failed

PUT hosts/localhost/devices/sys/tg_test/1/commands/DevVarCharArray


{
  "host": "localhost:10000",
  "device": "sys/tg_test/1",
  "name": "DevVarCharArray",
  "input": [48,49,50]
}

When write attribute(s), i want to pass new value in request’s body, but failed

PUT hosts/localhost/devices/sys/tg_test/1/attributes/long_spectrum/value"
# will set value to [], not [1,2,3,4]


{
  "host": "localhost:10000",
  "device": "sys/tg_test/1",
  "name": "long_spectrum",
  "value": [1,2,3,4]
}

thanks

2

Hi Jimmy,

As per version 2.1 DevVarCharArray is not supported.

Concerning long spectrum you should pass an argument as v query param:


PUT .../devices/sys/tg_test/1/attributes/long_spectrum/value?v=[1,2,3]

OR in encoded way:


PUT .../devices/sys/tg_test/1/attributes/long_spectrum/value?v=%5B1%2C2%2C3%5D

Hope this helps :sunglasses:

3

Thank you Ingvord

For write attributes, should pass an argument as v query param. As from https://tango-rest-api.readthedocs.io/en/v1.1/device/#value have: argument can be passed in request’s body. so i get can pass an argument as request body

4

That’s true, you can pass arguments in body for multiple attributes reading/writing, e.g. https://tango-rest-api.readthedocs.io/en/v1.1/hosts/#attributes

For single device attributes query parameter v is used

Cheers,