Allow mixin to reads from global variables

[vini-brito]

Is your feature request related to a problem? Please describe.
Currently mixins cannot read from variables, they only work if the url is statically written.
For example this does not works:

{
"@": "{{$global.myurl}}"
}

Describe the solution you'd like

Would be great to load from not-previously specified URLs.
For example in one view I make a network request to an API endpoint, then from that endpoint I get an URL as a response.
Then I'd write that URL to a global variable and href / move to another view and in that view the only code would be

{
"@": "{{$global.myurl}}"
}

That way we'd have a fully dynamic app, completely controlled by an endpoint, instead of having to build apps every time a link changes.

Describe alternatives you've considered
I'm using third party tooling to solve this, but it only increases costs and makes the whole flow more clumsy.

Identify which component would benefit from this feature

• Jasonette iOS
• Jasonette Android

Additional context
None for now.

[clsource]

Thanks for requesting this.
How is your current solution to this?. I'm curious about it 👍

[clsource]

I made some tests with this idea, but it was not feasible due to the mixins evaluated before templates. This means that the values in $global are not set when the mixin is being evaluated.

For now I will close this, but the idea will be considered in future engine implementations 👍

An alternative (althought a little cumbsersome) is using an external template engine in server rendering jsons. That could help but requires a dynamic server language like php, python or js and a server.

Thanks for sharing your idea it was helpful to understand better how mixins works 🥇

[vini-brito]

Sure, thank you for the attention anyway! I currently use integromat to do the adaptation of flows for me, but it won't be feasible at scale.
Indeed I imagined mixins were evaluated before any variables.

Just out of curiosity and for future consideration too, is it possible to estimate what would it take in development effort to have a kind of variable that can be read by the mixins?
I'm not a Java dev so I cannot assess that by myself.