Incorrect access of data properties in templates

[kirrg001]

Ref: https://forum.ghost.org/t/422-error-with-dynamic-route-with-longform-data-property/5268

If you are making use of data property like:

routes:
  /something/:
    data:
      categories:
        resource: tags
        type: browse

You currently need to access categories like this:

{{#foreach categories.tags}}
    {{this.slug}}
{{/foreach}}

This is a bug. It should work like this:

{{#foreach categories}}
    {{this.slug}}
{{/foreach}}

We want to add a forwards compatible change and support both syntax for now. We will drop the old and incorrect usage in Ghost 3.0

Ghost: latest