Problem updating existing documents

[nielsenk]

Hello,

I have a question with regard to the node-red-node-cf-cloudant to Node-RED.
I’m trying to update existing documents in my Cloudant database. On the site you describe it as:
“For update and delete, you must pass the _id and the _rev as part of the input msg object.”

I have tried to utilize this, however, I just can’t get it to work.

`msg.payload = {
"_id": node.customID,
"_rev": node.guid,
"tankID": node.tankID,
"volume": node.volume,
"capacity": node.capacity
};

console.log(msg);
node.send(msg);`

The above code is what I sent as input to the Cloudant node.
The _id I’m setting is the same everytime the code is called. The _rev are changed each time.
In the configuration of the Cloudant node I have specified to only store the msg.payload object.
As far as I understand the _rev has to change to get the update to work?

I hope you can help me, cheers!

[lgfa29]

Hi @nielsenk,

your _rev field shouldn't change at each call, in fact it should always be the same value you currently have in your database to avoid conflict errors. You can read more about it here: http://guide.couchdb.org/draft/conflicts.html.