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ChristianTremblay / pyhaystack

Pyhaystack is a module that allow python programs to connect to a haystack server project-haystack.org. Connection can be established with Niagara Platform running the nhaystack, Skyspark and Widesky. For this to work with Anaconda IPython Notebook in Windows, be sure to use "python setup.py install" using the Anaconda Command Prompt in Windows. If not, module will be installed for System path python but won't work in the environment of Anaconda IPython Notebook. You will need hszinc 1.3+ for this to work.
Apache License 2.0
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Skyspark with pyhaystack to create and modify points / tags #74

Closed Ckoshnick closed 4 years ago

Ckoshnick commented 5 years ago

Hello,

I'm a new user of skyspark and we're interested in integrating our campus' sites and historical data through the REST API or by using the pyhaystack library if that supports what we're trying to accomplish.

So far I've been successful in connecting to my server with the pyhaystack client and been able to read tags with operations like op = session.find_entity(filter_expr='temp')

an example sensor looks like this:

t1.tags
Out[20]: {air, disMacro='$equipRef $navName', equipRef=Ref('p:ucdavis:r:246332ce-cd5328e0', 'GBSF VAV6512', True), his, kind='Number', locationRef=Ref('p:ucdavis:r:24638759-cc1a3b2a', 'Floor 5', True), mod=datetime.datetime(2019, 5, 7, 17, 4, 17, 282000, tzinfo=datetime.timezone.utc), navName='Zone Air Temp', point, sensor, siteRef=Ref('p:ucdavis:r:24632687-0e4bd94c', 'GBSF', True), temp, tz='Los_Angeles', unit='°F'}

All is fine and well, except when I want to modify the tag list:

t1.tags['faketag1'] = None

Traceback (most recent call last):
File "<ipython-input-27-4eb0de79124a>", line 1, in <module>
t1.tags['faketag1'] = None

TypeError: 'ReadOnlyEntityTags' object does not support item assignment

Is there a setting in my skyspark server or the pyhaystack client that is ensuring that all of my tags are of type "ReadOnlyEntityTags" and not "MutableEntityTags"

This is the section of the pyhaystack documentation I was following along with. https://pyhaystack.readthedocs.io/en/latest/tags.html#adding-changing-and-deleting-tags

Thanks!

sjlongland commented 5 years ago

To the best of my knowledge, the only server that implements CRUD ops (and thus can use MutableEntityTags) is WideSky.

If you know of a way to perform CRUD ops for SkySpark and are willing to provide a patch, we can consider reviewing it, but right now I do not know of a way to modify the asset model in a SkySpark instance which is why the SkySpark code returns a ReadOnlyEntityTags instance.

ChristianTremblay commented 4 years ago

CLosing. If you still need this, please reopen