在selmer中迭代一张地图

时间:2016-01-08 04:38:49

标签: clojure selmer

我想在selmer中迭代一个地图,这样我就可以打印键和值。据我所知,开箱即用不支持,所以我尝试了以下内容:

(defn mapper-tag [args context-map content]
  (when-let [map-data (get context-map (keyword (first args))
                           (get context-map (first args)))]
    (apply str (for [[k v] map-data]
                 (selmer.parser/render (get-in content [:mapper :content]) {:key k :val v})))))

(selmer.parser/add-tag! :mapper mapper-tag :endmapper)
(selmer.parser/render  "{% mapper m %}KEY {{key}} \n{% endmapper %}"  {:m  {:a 1 :b 1}})

我希望这能输出类似的东西 KEY a KEY b

但它输出

KEY KEY

任何指针?

2 个答案:

答案 0 :(得分:2)

Clojure中的地图是seqs,所以你可以使用selmer for

 (selmer.filters/add-filter! :key key)
 (selmer.filters/add-filter! :val val)
 (selmer.parser/render  "{% for item in m %} KEY is {{item|key}} VALUES is {{item|val}}\n{% endfor %}"  {:m  {:a 1 :b 1}})

答案 1 :(得分:1)

Selmer的内置{% for %}循环allows for destructuring,因此您可以在模板中直接提取键/值:

(selmer.parser/render
  "{% for key,val in m %}KEY: {{key}}, VALUE: {{val}}\n{% endfor %}"
  {:m {:a 1 :b 1}})

输出:

KEY: a, VALUE: 1
KEY: b, VALUE: 1