Delete Attachment in PouchDB

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.
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.
Attachment Successfully Deleted.

Verification:

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

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