Iterating over double nested structures

[zuriar]

Hi

I have the following structure, passed to Selmer as variable 'res':

[ { :a "A1"
    :b "B1"
     :c [{ :aa "AA1"
            :bb "BB1"
            :cc "CC1"}
          { :aa "AA2"
            :bb "BB2"
            :cc "CC2"}
          { :aa "AA3"
            :bb "BB3"
             :cc "CC3"}]}
    {:a "A2"
     :b "B2"
      :c [{ :aa "AA11"
             :bb "BB11"
             :cc "CC11"}
           { :aa "AA21"
             :bb "BB21"
             :cc "CC21"}
          { :aa "AA31"
            :bb "BB31"
             :cc "CC31"}]}]

I want to iterate over the items in the first vector and print them out, and when getting to the ':c' fields I want to then start an inner iteration to print out the contents.

At the moment it is possible to get to every element in the structure with dotted notation. However, when I introduce an iterator using {% for n in res %} I then can not repeat this for the inner vector. Is this a lacking feature or am I not seeing the bigger picture? Thanks

[yogthos]

You should just be able to do the following:

(render
  "{% for i in res %}
      {{i.a}}
      {{i.b}}
      {% for j in i.c %}
          {{j.aa}}
          {{j.bb}}
          {{j.cc}}
      {% endfor %}
  {% endfor %}"
  {:res
   [{:a "A1"
     :b "B1"
     :c [{:aa "AA1"
          :bb "BB1"
          :cc "CC1"}
         {:aa "AA2"
          :bb "BB2"
          :cc "CC2"}
         {:aa "AA3"
          :bb "BB3"
          :cc "CC3"}]}
    {:a "A2"
     :b "B2"
     :c [{:aa "AA11"
          :bb "BB11"
          :cc "CC11"}
         {:aa "AA21"
          :bb "BB21"
          :cc "CC21"}
         {:aa "AA31"
          :bb "BB31"
          :cc "CC31"}]}]})

=>
"
 A1
 B1

 AA1
 BB1
 CC1

 AA2
 BB2
 CC2

 AA3
 BB3
 CC3


 A2
 B2

 AA11
 BB11
 CC11

 AA21
 BB21
 CC21

 AA31
 BB31
 CC31

 "

[zuriar]

Thanks, as I thought. Accessing nested structures works fine for non-dotted (that is, non Datomic) keywords but doesn't work for dotted even if the 'double dot' escape I added is used. However, the double-dotted notation does work for non-nested access.

I will have a dig and see why this may be. If you have any pointers to specific files/functions much appreciated. Expect another pull request in due course.

Thanks for your help,
Hugh

[yogthos]

Yeah, I thought your last pr would've addressed that, but maybe the for tag is working around it. Might be a good place to start. Thanks for spearheading this!