Question about multiple model instances

[Robert Rackl]

Hello there!

I have a question about SpineJS Models

My "TagTextField" is an HTML input Element, that allows the user to input a list of Tags. I already implemented a fancy way for entering new tags. Each Tag is an instance of my TagMdl class. But now I must be possible to show more than one tagtextfield on one page.  How should I organize my TagMdl for that?

Possible Solution:

1)   Let TagMdl now the HTML ID of the input element:

class TagMdl extends Spine.Model

  @configure 'TagMdl', 'tagtextfield_ID', 'tagname'

Advantage: Now I can easily get the list of tags for each tagtextfield

Disadvantage: But now event handling gets impossible. If only one tag is added, I'd have to rerender all tagtextfields on the page.

2)  Create a seperate set of tags for each tagtextfield.

This does not seem to be possible with spine, since a Spine.Model class has its class methods only once.

I am kind of stuck here. Any suggestions?

Yours,

   Robert

[Robert Rackl]

My problem still exists.  This seems to be a general problem in spine.   How to handle multiple instances of one Model?     I.e. Multiple lists with elements of the same type.

[Richard Flosi]

Hi Robert,

Yes, in Spine Models are Singletons.

I believe the solution to your problem is to subclass your model and give it a new name, then you will have 2 Singletons.

So if your current model is:

class TagMdl extends Spine.Model

  @configure 'TagMdl', 'tagname'

Create a new module with:

TagMdl = require('path/to/tagmdl')

class TagMdl2 extends TagMdl

  @configure 'TagMdl2', 'tagname'