I'm saving a JSON object to file context similar to; { "192-168-1-10": [ { "last_on": 1622751269764 }, { "last_off": 1622751272068 } ], "192-16-1-13": [ { "last_on": 1622751772269 }, { "last_off": 1622751774284 } ] } The data is const…

{ "192.168.1.10": { "last_on": 1622751269764, "last_off": 1622751272068 }, "192.16.1.13": { "last_on": 1622751772269, "last_off": 1622751774284 } } Working demo updating the values of the objects properties... [{"id":"4d40b13c.c8309","type":"function","z":"1bd…

Must your data be in that format (in particular the array with objects)? If you use object properties you can simply update the value.

Using my data above, can you give an example of what structure you recommend pls.

[image] Paul-Reed: global.set(mystore.192-16-1-13, newarray); global.set("mystore.192-16-1-13[0].last_on", 16227512720888); should work, But as Steve said would be best with objects. something like this, will allow you to add mre properties as and when. { "192-168-1-10": { "las…

[image] E1cid: global.set("mystore.192-16-1-13[0].last_on", 16227512720888); should work Thanks, but I tried that earlier, but it just crashes node-RED. [image] Steve-Mcl: Working demo updating the values of the objects properties... That's a really helpful example, thanks Steve. Th…

[image] Paul-Reed: Thanks, but I tried that earlier, but it just crashes node-RED. Works for me on node-red 1.2.9 [image] Paul-Reed: The size of the arrays are likely to increase as new features are added, How would you add to the last_on if it is not an object or an array? Never mi…

[image] E1cid: Works for me on node-red 1.2.9 I'm using v1.3.5 It was intuitive to format it that way, but I tried it twice and it failed for me. Regardless, I think I need to change the structure, and get rid of the arrays. Thanks.

I blame Julian ( @TotallyInformation ) it's all his fault :wink::wink::wink: [image] Calculate the time of operation between ON and OFF given Boolean General Bit late to the conversation but I store last_on and last_off as part of any IoT switch, this is also sent to MQTT. …

I am that virus! :mage: Actually, I think we had a discussion previously on the forum about retrieving/saving context variables and the decision then is that you might was well get/set the whole object. Because JavaScript passes by reference it may actually be more efficient (at least for memory an…

How does this work??? Even with the flow.set command commented out (as per the comment), the device.last_on & device.last_off context values still get updated... despite there not being a command to do so!! A wild guess is that it's due to javascript pass-by-reference, but I'm probably wrong …

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Saving a single value to context

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Paul-Reed 3 June 2021 22:47 10

I blame Julian (@TotallyInformation ) it's all his fault

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Saving a single value to context

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