Delete Attachment in PouchDB

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PouchDB Delete Attachment
To delete an attachment from PouchDB, the removeAttachment() method is used.

Syntax:

db.removeAttachment ( doc_Id, attachment_Id, rev, [callback] );

Example:

  • Create a file named “DeleteAttach.js” within a folder named “Examples”.
  • Add the below code to the file.
    DeleteAttach.js:

    var PouchDB = require('PouchDB');
var db = new PouchDB('Example_Database');
db.removeAttachment('101', 'attach_1.txt', '1-f56789f432154adb782da98358921a14',
function(err, res) {
if (err) {
return console.log(err);
} else {
console.log("Attachment Successfully Deleted.")
}
});
  • Open the command prompt.
  • Execute the .js file. 
    node DeleteAttach.js

    Console Output:

    Attachment Successfully Deleted.

Verification:

Use read command to verify that the attachment is deleted from the document.

To delete an Attachment from a Remote Database:

Instead of the database name, pass the path of the database to delete an attachment from CouchDB or remote server.
Example:

  • Create a file named “DeleteRemoteAttach.js” within a folder named “Examples”.
  • Add the below code to the file.
    DeleteRemoteAttach.js:

    var PouchDB = require('PouchDB');
var db = new PouchDB('http://localhost:5984/students');
db.removeAttachment('101', 'attach_2.txt', '2-fec1229a76543db973ace8fcbacd453',
function(err, res) {
if (err) {
return console.log(err);
} else {
console.log("Attachment Successfully Deleted.")
}
});
  • Open the command prompt.
  • Execute the .js file. 
    node DeleteRemoteAttach.js

    Console Output:

    Attachment Successfully Deleted.

Verification:

Check the document in the CouchDB server for the deleted attachment. There will be no attachment as such.