Using "../" for parent context in {{if}} helper changes context of entire block

[jas]

Given the following template and model:

{{#with foo}}
  {{#if ../bar}}
    {{baz}}
  {{/if}}
{{/with}}

{
  foo: {
    baz: 'OK!'
  },
  bar: true,
  baz: 'Not OK!'
}

I expect the output to be OK!, but instead it is Not OK!. It appears Ember Handlebars is changing the context within the {{#if}} helper block when ../ is used to reference the parent context.

JSBins:

• Ember Handlebar's output: http://emberjs.jsbin.com/guroxatoyali/1/edit?html,js,output
• Normal Handlebars output: http://jsbin.com/susabuxozabo/1/edit?html,js,output

[stefanpenner]

Not supported in ember

[fivetanley]

is this something we could support? it's really nice.

[stefanpenner]

@mmun r?

[mmun]

@fivetanley We're moving away from context changing helpers so it will have no purpose in the future. Excusing keywords, the paths foo, ../foo, ../../foo, etc. will always return the same value. (Just like when you're using {{with x as y}} and {{each x in xs}})

In theory we could support this with context changing helpers after @twokul's work on view helper context is complete, but I recommend against it. It is a code smell and block params is the Febreze.

[jas]

@mmun Is {{with x as y}} already supported? I'm not having any luck with that currently. (JSBin: http://emberjs.jsbin.com/guroxatoyali/2/edit)

Never mind. I had x and y swapped. Updated JSBin: http://emberjs.jsbin.com/guroxatoyali/4/edit

I didn't know about this syntax. Thanks, @mmun!