Read Batch in PouchDB

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PouchDB Read Batch

To retrieve a PouchDB batch, the allDocs() method is used.

Syntax:

db.allDocs()

Example:

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

    ReadBatch.js:

    var PouchDB = require('PouchDB');
var db = new PouchDB('Example_Database');
db.allDocs(function(err, docs) {
if (err) {
return console.log(err);
} else {
console.log (docs.rows);
}
});
  • Open the command prompt.
  • Execute the .js file. 
    node ReadBatch.js

    Output:

    [ { id: '101',
key: '101',
value: { rev: '1-f56789f432154adb782da98358921a14' } },
{ id: '102',
key: '102',
value: { rev: '1-3cacb3a45e5678d90870f4e92dc9876d' } },
{ id: '103',
key: '103',
value: { rev: '1-afec1229a76543db973ace8fcbacd45' } } ]

     

    To see the whole document in the result:

    • Make the optional parameter include_docs true.
    • Create a file named “ReadWholeBatch.js” within a folder named “Examples”.
    • Add the below code to the file.
      ReadWholeBatch.js:

      var PouchDB = require('PouchDB');
var db = new PouchDB('Example_Database');
db.allDocs({include_docs: true}, function(err, docs) {
if (err) {
return console.log(err);
} else {
console.log (docs.rows);
}
});
    • Open the command prompt.
    • Execute the .js file. 
      node ReadWholeBatch.js

      Output:

      [ {  id: '101',
key: '101',
value: { rev: '1-f56789f432154adb782da98358921a14' },
doc:
{ name: 'Tom',
salary: 25000,
experience: 3,
_id: '101',
_rev: '1-f56789f432154adb782da98358921a14' } },
{ id: '102',
key: '102',
value: { rev: '1-3cacb3a45e5678d90870f4e92dc9876d' },
doc:
{name: 'Jerry',
salary: 20000,
experience: 2,
_id: '102',
_rev: '1-3cacb3a45e5678d90870f4e92dc9876d' } },
{ id: '103',
key: '103',
value: { rev: '1-afec1229a76543db973ace8fcbacd45' },
doc:
{ name: 'Bruno',
salary: 30000,
experience: 4,
_id: '103',
_rev: '1-afec1229a76543db973ace8fcbacd45' } } ]

    To read a Batch from Remote Database:

    Instead of the database name, pass the path of the database to read a batch in CouchDB or remote server.

    Example:

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

      var PouchDB = require('PouchDB');
var db = new PouchDB('http://localhost:5984/students');
db.allDocs({include_docs: true}, function(err, docs) {
if (err) {
return console.log(err);
} else {
console.log(docs.rows);
}
});
    • Open the command prompt.
    • Execute the .js file. 
      node ReadRemoteBatch.js

      Output:

      [ {  id: '101',
key: '101',
value: { rev: '1-acb312f4321546901aada9835889ccca1' },
doc:
{ name: 'Tom',
salary: 25000,
experience: 3,
_id: '101',
_rev: '1-acb312f4321546901aada9835889ccca1' } },
{ id: '102',
key: '102',
value: { rev: '1-1a2c3b3a45ae5111d90870f4e92dc55543' },
doc:
{name: 'Jerry',
salary: 20000,
experience: 2,
_id: '102',
_rev: '1-1a2c3b3a45ae5111d90870f4e92dc55543' } },
{ id: '103',
key: '103',
value: { rev: '1-345ac229a76543db6ab5648fc987bbb5' },
doc:
{ name: 'Bruno',
salary: 30000,
experience: 4,
_id: '103',
_rev: '1-345ac229a76543db6ab5648fc987bbb5' } } ]