Way to refer to parent model via expression

[asudoh]

To do so currently requires application or third-party system to implement “binding source factory” API, which let you parse {{expression}} yourself and determine what to do with the expression (you can see some implementations in liaison/alternateBindingSource.js). May be worthwhile to consider doing that right in liaison. It may involve supporting “named scope” ({{name in model}}).

[cjolif]

I would tend to say this would be nice addition, writing your own expression parsing is definitely not something everyone would like to deal with.

interested in @tkrugg & @damiengarbarino feedback

[damiengarbarino]

Not sure to completely understand the topic as I never used liaison so ignore this remark if I am out of the scope of this issue.
Angular ng-repeat directive is working like that ("item in list") and creates a child scope. It allows to use other list properties or other properties of the scope inside the loop.
My 2 cents

[asudoh]

As far as I see how Angular works on repeat, it appears to put parent scope to scope’s prototype. So scope has read-only access to parent scope’s properties. liaison (as well as Polymer) do not have “scope” notion and they work in a way of putting model to <template>. It would be intrusive to overwrite prototype of such model for the sake of access to parent <template>’s model properties.