all files / lib/offshore/adapter/sync/strategies/ create.js

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
 
 
 
 
2×
2×
2×
 
 
 
 
 
 
 
 
 
2×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
/**
 * Module dependencies
 */
 
var _ = require('lodash');
var async = require('async');
var hasOwnProperty = require('../../../utils/helpers').object.hasOwnProperty;
 
 
/**
 * Try and synchronize the underlying physical-layer schema
 * in safely manner by only adding new collections and new attributes
 * to work with our app's collections. (i.e. models)
 *
 * @param  {Function} cb
 */
module.exports = function(cb) {
  var self = this;
 
 
  // Check that collection exists
  self.describe(function afterDescribe(err, attrs) {
 
    if (err) return cb(err);
 
    // if it doesn't go ahead and add it and get out
    if (!attrs) return self.define(cb);
 
 
    var query = self._query || {};
    var connName = self.connection;
    // check default connection
    if (connName === 'default' && query.defaultConnection) {
      connName = query.defaultConnection;
    }
    var connection = self.query.offshore.connections[connName];
    // check connection
    if (!connection) {
      return cb(new Error('No valid connection specified'));
    }
    var adapter = connection._adapter;
 
    // Check if an addAttribute adapter method is defined
    if (!hasOwnProperty(adapter, 'addAttribute')) {
      return cb();
    }
 
    // The collection we're working with
    var collectionID = self.collection;
 
    // Remove hasMany association keys before sending down to adapter
    var schema = _.clone(self.query._schema.schema) || {};
    Object.keys(schema).forEach(function(key) {
      if (schema[key].type) return;
      delete schema[key];
    });
 
    // Iterate through each attribute in the new definition
    // Used for keeping track of previously undefined attributes
    // when updating the data stored at the physical layer.
    var newAttributes = _.reduce(schema, function checkAttribute(newAttributes, attribute, attrName) {
      if (!attrs[attrName]) {
        newAttributes[attrName] = attribute;
      }
      return newAttributes;
    }, {});
 
    // Add new attributes
    async.eachSeries(_.keys(newAttributes), function(attrName, next) {
      var attrDef = newAttributes[attrName];
      adapter.addAttribute(connName, collectionID, attrName, attrDef, next);
    }, cb);
 
  });
};