how can i delete a single field in a document in couch db?

Question

how can i delete a single field in a document in couch db?

I googled and searched in stackoverflow.There I find this :

db.get('id', function (err, doc) {
   var inside_key_values = doc.key_value_pair;

   delete inside_key_values[key_to_delete];

   db.merge("document", {
         key_value_pair: inside_key_values
        }, function (err, res) {
         console.log('New key value pairs saved')
      });

 });

In this,how can i replace doc.key_value_pair with my field.My field is like tradeinfo : "Something that we enter", Under certain case I have to delete this field(Key - value pair).Is that above code works..?

Thanks in advance.....

database
node.js
couchdb

Answer 1

 First we have to get the document from database
 After that delete the required field using delete operator and then update the document like

  delete doc.tradeinfo;

Here tradeinfo is the field that I want to delete in the document(doc)