Refactor with Sync 1.0 changes #60

superkhau · 2015-04-06T18:19:45Z

Connect to strongloop-internal/scrum-loopback#214

bajtos · 2015-04-21T16:12:58Z

Can you please make the commit message of 7a545e7 more explanatory? Change tracking was already enabled.

superkhau · 2015-04-22T05:02:31Z

@bajtos Running grunt alone shows this error:

Running "karma:unit" (karma) task
INFO [karma]: Karma v0.12.31 server started at http://localhost:8080/
INFO [launcher]: Starting browser PhantomJS
WARN [watcher]: Pattern ".../loopback-example-offline-sync/client/ngapp/test/mock/**/*.js" does not match any file.
INFO [PhantomJS 1.9.8 (Mac OS X)]: Connected on socket z-UTHdFtwZ2ZLg01gBEa with id 33976604
PhantomJS 1.9.8 (Mac OS X) ERROR
  TypeError: 'undefined' is not a function (evaluating 'Number.isFinite(parseInt(v, 10))')
  at .../loopback-example-offline-sync/client/lbclient/browser.bundle.js:16224


Warning: Task "karma:unit" failed. Use --force to continue.

Aborted due to warnings.

Do you know what this means?

superkhau · 2015-04-22T05:25:44Z

Also getting:

Running "mochaTest:server" (mochaTest) task

  Todo
    New todo empty data
      POST /api/Todos
        ✓ should be allowed
        ✓ should have statusCode 200
        1) should respond with a new todo # this is failing
  ...
  1 failing

  1) Todo New todo empty data POST /api/Todos should respond with a new todo:
     AssertionError: null == true
      at Context.<anonymous> (server/test/todo.test.js:23:9)

For some reason, the test is returning an actual mongo id (might be something to do with the "before save" operation hook).

superkhau · 2015-04-22T05:31:04Z

server/test/todo.test.js

@@ -19,7 +19,8 @@ describe('Todo', function() {
        assert.equal(this.res.statusCode, 200);
      });

-      it('should respond with a new todo', function() {
+      it.skip('should respond with a new todo', function() {
+        console.log(this.res.body.id);


this.res.body.id returns an actual MongoDB id instead of the t-math id. Any idea why this is happening?

bajtos · 2015-04-22T06:50:39Z

Number.isFinite

See strongloop/loopback-boot#124

Todo New todo empty data POST /api/Todos should respond with a new todo

No idea.

this.res.body.id returns an actual MongoDB id instead of the t-math id. Any idea why this is happening?

I think that's because all Todo ids are initialized with a GUID value - see "defaultFn": "guid" in model config. This is intended and required for sync to work correctly.

superkhau · 2015-04-22T06:56:39Z

client/lbclient/boot/replication.js

+      RemoteTodo,
+      since.push,
+      function pushed(err, conflicts, cps) {
+        console.log('LR', arguments);


Getting [Error: Invalid URI "/api/Todos/checkpoint", undefined, undefined] here also.

Is the URL "/api/Todos/checkpoint" available in the explorer?

Please create a new RemoteTodo model per the instructions in docs and use it instead of the base Todo model here.

- var RemoteTodo = client.models.Todo; + var RemoteTodo = client.models.RemoteTodo;

I think the problem is caused by the fact that your RemoteTodo (=base Todo ATM) has change tracking enabled, thus it's trying to rectify changes via REST API. That's why you need to create a new subclass RemoteTodo which will not track changes but still provide the replication API. See the docs for more details.

For each replicated model, create two new client-only subclasses:

A local model that will use local storage to persist the changes offline

A remote model that will be connected to the server and used as a target for replication. This model will have change tracking disabled (because the server is already handling it) and enable only the replication REST API.

Figured it out, see https://github.com/strongloop/loopback-example-offline-sync/pull/60/files#r28929070

superkhau · 2015-04-22T20:35:57Z

client/lbclient/boot/replication.js

+      RemoteTodo,
+      since.push,
+      function pushed(err, conflicts, cps) {
+        if (err) throw err;


Still getting Invalid URI "/api/Todos/checkpoint" here. Do you see any obvious changes I may have missed? FYI, I just copied/pasted all the code from the confluence docs this time.

superkhau · 2015-04-22T20:45:22Z

See strongloop/loopback-boot#124

I see, will bump loopback-boot version when that gets merged.

No idea.

Going to skip the test then.

I think that's because all Todo ids are initialized with a GUID value - see "defaultFn": "guid" in model config. This is intended and required for sync to work correctly.

I see. So it's possible this initialization is causing that one test to fail then. Anyways, I'm skipping the test, so its not blocking what we're trying to do anyways.

superkhau · 2015-04-23T00:57:48Z

client/lbclient/datasources.local.js

@@ -2,6 +2,6 @@ var GLOBAL_CONFIG = require('../../global-config');

 module.exports = {
  remote: {
-    url: GLOBAL_CONFIG.restApiUrl
+    url: 'http://localhost:3000' + GLOBAL_CONFIG.restApiUrl


I figured out the problem. This might be a bug, but you need to add the fully qualified URL and domain for things to work properly. Thoughts?

See strongloop/strong-remoting#200

The host + port must not be hard-coded here. Check the way how GLOBAL_CONFIG is constructed and modify the code to produce a full URL, so that datasources.local.js can stay unchanged.

Note that host + port value must be synchronized with settings in server/config.json. When you change port in server/config.json, the client app should automatically pick it up after rebuild via grunt.

bajtos · 2015-04-23T06:59:57Z

Going to skip the test then.

No no, don't skip the test, fix it instead. As you can see, it's checking the format of the id property:

assert(this.res.body.id.match(/t-\d+/));

Since you are no longer generating ids as t-XYZA, you should rework the test to check something else that makes sense. For example that id has a GUID format.

Or simply remove it('should respond with a new todo') completely, since the other tests are already testing that a new Todo instance can be created.

superkhau · 2015-04-23T20:15:14Z

No no, don't skip the test...

Updated the test to check for proper GUID format.

superkhau · 2015-04-24T06:02:22Z

@bajtos Please code review. If you see anything obvious that needs fixing, please add it to this PR yourself as I will be away for 2 weeks. If there is no hurry to merge this, then I can finish it up when I'm back. As for the easy-to-read GUID feature, I created a separate issue at #62 and will work on it after I'm back.

bajtos · 2015-04-24T07:16:18Z

client/lbclient/datasources.json

@@ -1,6 +1,7 @@
 {
  "remote": {
-    "connector": "remote"
+    "connector": "remote",
+    "url": "/api"


AFAIK, this value is overriden by datasources.local.js and thus not used.

Removed url k/v.

chandadharap · 2015-04-27T20:05:46Z

Assigning back to @bajtos , Simon on PTO

bajtos · 2015-05-05T11:45:13Z

Reassigning back to Simon, offline sync is not urgent now.

ritch · 2015-05-12T15:53:13Z

@superkhau @bajtos is this good to go?

superkhau · 2015-05-12T16:49:02Z

@ritch Almost. I need to refactor the configs based on @bajtos's comments and then it should be good to go.

superkhau · 2015-05-13T07:19:14Z

@bajtos Code review again please.

bajtos · 2015-05-13T16:03:53Z

client/lbclient/boot/replication.js

@@ -23,17 +23,32 @@ module.exports = function(client) {
  };

  // setup model replication
+  var since = {push: -1, pull: -1};


Nitpick: AFAIK, we use Node coding style where curly braces are surrounded by spaces: { push: -1, pull: -1 }.

Is there a style guide for the style you describe? I've just been following the Google one at https://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml

Is there a style guide for the style you describe?

https://strongloop.atlassian.net/wiki/display/SL/Code+Style+Guide

We have had some discussions about spacing in array/object initialisation - see https://strongloop.atlassian.net/wiki/display/SL/Code+Style+Guide?focusedCommentId=21430339#comment-21430339

TY, I will take a look. ;)

bajtos · 2015-05-13T16:05:55Z

Nice! I left one more comment, feel free to ignore it. The rest LGTM.

- Enable "strict" and "persistUndefinedAsNull" flags for the Todo model - Correctly store & send since checkpoints - Remove deprecated events with operation hooks - Implement error handler for change-tracking errors - Rework conflict resolution in `client/ngapp/scripts/controllers/todo.js` to use the new API

…-changes Refactor with Sync 1.0 changes

superkhau self-assigned this Apr 6, 2015

superkhau changed the title ~~Enable change tracking~~ Refactor with Sync 1.0 changes Apr 16, 2015

superkhau force-pushed the feature/refactor-with-sync-1.0-changes branch 2 times, most recently from 7a0a761 to 87f43a9 Compare April 21, 2015 21:40

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superkhau force-pushed the feature/refactor-with-sync-1.0-changes branch 3 times, most recently from 9e71a07 to 00e1980 Compare April 22, 2015 05:30

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superkhau force-pushed the feature/refactor-with-sync-1.0-changes branch from 57eeea2 to f540e99 Compare April 23, 2015 20:12

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superkhau mentioned this pull request Apr 24, 2015

Easy-to-read GUIDs #62

Closed

bajtos mentioned this pull request Apr 24, 2015

Docs for conflict resolution strongloop/loopback#1333

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bajtos added this to the #Epic: Offline Sync V1 milestone Apr 24, 2015

chandadharap assigned bajtos and unassigned superkhau Apr 27, 2015

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superkhau force-pushed the feature/refactor-with-sync-1.0-changes branch from 5729f88 to d1345fa Compare May 13, 2015 07:15

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superkhau force-pushed the feature/refactor-with-sync-1.0-changes branch from d1345fa to a5dd541 Compare May 13, 2015 16:08

superkhau added a commit that referenced this pull request May 14, 2015

Merge pull request #60 from strongloop/feature/refactor-with-sync-1.0…

476bb23

…-changes Refactor with Sync 1.0 changes

superkhau merged commit 476bb23 into master May 14, 2015

superkhau deleted the feature/refactor-with-sync-1.0-changes branch May 14, 2015 03:04

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Refactor with Sync 1.0 changes #60

Refactor with Sync 1.0 changes #60

superkhau commented Apr 6, 2015

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Refactor with Sync 1.0 changes #60

Refactor with Sync 1.0 changes #60

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superkhau commented Apr 6, 2015

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