Variable overwrite or deletion

TagoIO Analysis and Actions
1

Hi there,

Some best practice advice it would be very useful here.

I have several variables stored on mutable device that are updated through Analysis.

I have need only of the last value, is there a chance to overwrite the variable or I have to delete the old values monthly?

Thanks in advance!

2

Hi Viorel,

You can update the already existing variables using the TagoIO SDK!

Using the editData() method you can chose which variable you want to edit.

Hope this helps!

3

Hey Freddy, that method can work with bot mutable and inmutable buckets? Or just mutable ones?

Edit: nvm I read that it’s only on mutable ones.

4

@[

Freddy Minuzzi

](https://help.tago.io/portal/en/community/user/264273000027113076) I’ll have a look at that! Thanks!

5

Team,

This isn’t as easy to use as it looks. I think FIRST, you have to put some data into the store.

The pseudo-code looks something like this:

if( data_doesn’t exist ) { senddata; return }

if( data_exists ) { getdata ; extract_id ; edit_data }

It would be SUPER COOL if you had a:

updateorcreateData( {stuff to update } );

6

I just got this code (i’m no js expert - just a hack)

//

// using nickname tag, write this dynamic data to the mutable bucket

//

const writeValue = {

variable: myNickname.value,

value: myWaterSoil,

unit: “Percent”,

};

//

// before writing, find out if the variable exists. if it does

// use editData, if it doesn’t use sendData.

//

// to find out if it exists, use getData

//

const readValue = {

variable: myNickname.value,

query: “last_item”,

};

//

// get device data using the nickname

//

const getResult = await outDevice.getData(readValue);

context.log(" from getResult ", getResult );

if( getResult.length ) {

const dataId = getResult[0].id;

context.log(" FOUND - Updating ", dataId );

writeValue[“id”]= dataId;

const Result = await outDevice.editData(writeValue);

}

else {

context.log(" NOT found - Writing ", getResult );

const Result = await outDevice.sendData(writeValue);

}

}

module.exports = new Analysis(init);