CODEWITHSUNDEEP
reactjscouchdbpouchdb
Jaffer Sathick
Jaffer Sathick

Reputation: 546

sync pouchdb with filtered replication

I am using pouchdb and couchDb as a db for my offline first mobile app with react.

https://pouchdb.com/2015/04/05/filtered-replication.html

based on the above like i configured pouchdb and sync with couchdb.I am doing user based filtering. when the user logs out and logs in again, the db values are available. what is the best design approach to do that?

Is there any example available where i can refer ? 

configurePouchdb(user) {
var db = new PouchDB('dbname', {adapter: 'websql'});

 var serverSideFilter = {
        _id: "_design/app",
        filters: {
            "by_user": function (doc, req) {
                return doc._id === '_design/app' || (doc.userId != undefined && doc.userId === req.query.userId);
            }.toString()
        }
    };
    db.put(serverSideFilter).then(function (doc) {
        // design doc created!
    }).catch(function (err) {
        // if err.name === 'conflict', then
        // design doc already exists
    });
  db.sync('http://127.0.0.1:5984/dbname', {
        live: true,
        retry: true,
        filter: 'app/by_user',
        query_params: {"userId": user}
    });
    return db;
}

Upvotes: 2

Views: 2542

Answers (1)

aleknaui
aleknaui

Reputation: 439

As far as I know, views in either CouchDB or PouchDB don't have a req argument, since views generate only one index that doesn't vary among users.

As said in https://pouchdb.com/2015/04/05/filtered-replication.html, it's not recommended to use filtered replications instead of proper authentication. There is a good recipe from one of the main committers of PouchDB in https://github.com/nolanlawson/pouchdb-authentication#couchdb-authentication-recipe

In any case, there's a very good guide to filtered replication in the PouchDB API documentation: https://pouchdb.com/api.html#filtered-replication.

Upvotes: 5

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