pouchdb-find/lib/adapters/local/delete-index/index.js

Easy-to-use query language for PouchDB

'use strict';

var abstractMapper = require('../abstract-mapper');
var upsert = require('../../../abstract-mapreduce/upsert');

function deleteIndex(db, index) {

  if (!index.ddoc) {
    throw new Error('you must supply an index.ddoc when deleting');
  }

  if (!index.name) {
    throw new Error('you must supply an index.name when deleting');
  }

  var docId = index.ddoc;
  var viewName = index.name;

  function deltaFun (doc) {
    if (Object.keys(doc.views).length === 1 && doc.views[viewName]) {
      // only one view in this ddoc, delete the whole ddoc
      return {_id: docId, _deleted: true};
    }
    // more than one view here, just remove the view
    delete doc.views[viewName];
    return doc;
  }

  return upsert(db, docId, deltaFun).then(function () {
    return abstractMapper.viewCleanup.apply(db);
  }).then(function () {
    return {ok: true};
  });
}

module.exports = deleteIndex;