Concatenate if_attribute, if_permitted_to

[Eric Hu]

I'd like to write something like the following:

has_permission_on [:videos], to: [:read] do
if_attribute attachment: is_not {nil},
if_permitted_to :show, :attachment
end

Currently there's similar behavior for chaining multiple if_attribute
statements, with the default behavior ANDing them together. It's
unclear to me whether these could somehow be combined.

For now, I'm just copying the conditions for :show on Attachments to
Videos, but that isn't DRY.

[Steffen Bartsch]

Am Montag, 9. Januar 2012 schrieb Eric Hu:
> Currently there's similar behavior for chaining multiple if_attribute
> statements, with the default behavior ANDing them together. It's
> unclear to me whether these could somehow be combined.

The :join_by parameter of has_permission_on should do this.

http://www.tzi.org/~sbartsch/declarative_authorization/master/classes/Authorization/Reader/AuthorizationRulesReader.html

Steffen

[Eric Hu]

So just to be clear, the solution should look like this

    has_permission_on [:videos], to: [:read], join_by: :and do
     if_attribute attachment: is_not {nil}
     if_permitted_to :show, :attachment
   end

Pretty straightforward.  Thanks!

2012/1/10 Steffen Bartsch <sbar...@tzi.de>

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