Empty String Support

[Artyom Sivkov]

Dear community,

We have made some tests trying to insert the empty string value to KairosDB via /api/v1/datapoints but seems like this is not allowed:

{  "errors": [  "metric[0](name=artyom-test).value may not be empty." ] }

In our use case empty string is a valid data point so I wonder what is the reason for not supporting empty string?

Thanks in advance

Artyom

[Brian Hawkins]

I think this is just a case of never thinking an empty string is a valid data point.  I'll have to run some tests but I think it should be ok with some caveats.  You will need to explicitly tell kairos that the type of data is string.  The api has ways of doing that.

I'm guessing the restriction came before you could call out what the data type is and kairos had to figure it out on its own.  I'll test and post back here.

Brian

[Brian Hawkins]

I  just made a change to develop branch that allows empty strings to be inserted as string data points.  You have to specify the type though.

Brian

[Artyom Sivkov]

Thanks a lot Brian!

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