Htykuut

I am a newbie to couchdb/nano and to databases in general. I have a docker container with couchdb installed. I'm using nano to be able to access the couchdb functions.

I have added an update handler function for my database:

{

  "_id": "_design/Update_Handler",

  "_rev": "11-2103c2595e4c56ddc0acc49e5d498f44",

  "$doctype": "updateHandler",

  "updates": {

    "addData": "function(doc,req) {console.log("add this data to db ");}"

  }

}

To begin with, I am trying to write a simple addData function and see how to call it from nano. I see a db.atomic function that could be used.

https://github.com/apache/nano#dbatomicdesignname-updatename-docname-body-callback

Here's an example listed on this page:

db.atomic("update", "inplace", "foobar",

{field: "foo", value: "bar"}, function (error, response) {

  assert.equal(error, undefined, "failed to update");

  assert.equal(response.foo, "bar", "update worked");

});

Based on this, I tried to do this in my code:

this.myDB.atomic("updateHandler","addData",id1,data1,function(err, body){if(err) console.log(err);console.log("Added to DB using update handlern");

However, when I try to do something similar, I get a 404 error. It looks like my nano instance is unable to find the addData handler function defined. I do see the "Added to DB using update handler" log printed , but not the log from the update handler function itself.

A few questions:

1. Am I calling the update handler correctly? To me, it loooks like we are unable to find it.


2. any code samples I could look at?


3. In addition, have I defined the update handler itself correctly? could that be a reason nano is unable to find it?

Thanks in advance..