RxDocument - number field is set to null

[topperblues]

Case

Bug

Issue

I try to use an RxDocument as described in the examples but the schema have a number field. When i create the form all works well but when an user write a number in the number field and then delete it the field is set to null.
This generate an error (see Code section) that block all changes to the RxDocument while the page is refreshed.
If i try to save the document after delete and rewrite the number field without page refresh, i get a validation error on the number field because it is still set to null.
For the code refer to https://github.com/pubkey/rxdb/tree/master/examples/angular2/app/src/components/hero-insert

Info

• Environment: Angular 2, Browser or Electron
• Adapter: IndexedDB

Code

For the code refer to https://github.com/pubkey/rxdb/tree/master/examples/angular2/app/src/components/hero-insert

ERROR TypeError: Cannot read property 'defineGetter' of null
at RxDocument.js:239
at Array.forEach ()
at RxDocument._defineGetterSetter (RxDocument.js:235)
at RxDocument.get (RxDocument.js:223)
at RxDocument.foglio (RxDocument.js:240)
at Object.eval [as updateDirectives] (RegistroAddComponent.html:38)
at Object.debugUpdateDirectives [as updateDirectives] (core.es5.js:13108)
at checkAndUpdateView (core.es5.js:12288)
at callViewAction (core.es5.js:12653)
at execEmbeddedViewsAction (core.es5.js:12611)

[pubkey]

I can reproduce the error because of setting null as value.
But I can not reproduce the error with defineGetter. Can you enlist the steps to reproduce?
Which browser do you use?

[topperblues]

Browser

I'm using Chrome browser.

Steps

Changes i made:
In the collection schema:

"age": {
            "type": "number"
        },

In the component:

const collection = await this.databaseService.getCollection('person');
this.person = collection.newDocument({
        ...
        "age": 0,
        ...
      });

Where getCollection('person') return Person collection from _createCollections.

In the template:
<input type="number" class="form-control" id="age" name="age" [(ngModel)]="person.age">

Error

When i delete the 0 in the age filed of the form i get this error in console:

ERROR TypeError: Cannot read property '__defineGetter__' of null
    at RxDocument.js:239
    at Array.forEach (<anonymous>)
    at RxDocument._defineGetterSetter (RxDocument.js:235)
    at RxDocument.get (RxDocument.js:223)
    at RxDocument.age (RxDocument.js:240)
    at Object.eval [as updateDirectives] (PersonAddComponent.html:38)
    at Object.debugUpdateDirectives [as updateDirectives] (core.es5.js:13108)
    at checkAndUpdateView (core.es5.js:12288)
    at callViewAction (core.es5.js:12653)
    at execEmbeddedViewsAction (core.es5.js:12611)

From now every time i type a digit in the field i get the same error in console.

If never empty age field i never get error.

[pubkey]

This helps a bit. But it's not complete. There is not person-collection in the ng2-example. Can you fork this repo and implement the changes in the fork?

EDIT: I could reproduce this now. I will investigate..

[pubkey]

Fixed with this commit. (Accidentially set the wrong commit-number)

[topperblues]

Issue fixed, thanks