Extracting nested json object from json in freemarker

Question

<#assign test='{ "apple": 5, "banana": {"kiwi": 15 }}'?eval>

I need to extract banana object , tried like below but it's getting error out.

${test.banana}

Error For "${...}" content: Expected a string or something automatically convertible to string (number, date or boolean), or "template output" , but this has evaluated to an

extended_hash (wrapper: f.c.HashLiteral$SequenceHash):
==> test.banana  [in nameless template at line 2, column 3]

FTL stack trace ("~" means nesting-related):
    - Failed at: ${test.banana}  [in nameless template at line 2, colum

Sudarsanam V N · Accepted Answer · 2019-04-29 12:18:09Z

3

These are the ways you can access. Input

    <#assign test = { "apple": "5", "banana": {"kiwi": 15 }} >

Directly access your key and display the value. (if you know the key)

    ${test.banana.kiwi}

Dynamically list the keys

    <#list test.banana?keys as k>
    ${k}
    </#list>

Dynamically list the values

    <#list test.banana?values as v>
    ${v}
    </#list>

Dynamically list the keys and values

    <#list test.banana as k,v >
    ${k}: ${v}
    </#list>

I hope you can access the banana json in any of the 3 ways said above and achieve your objective.

Reference: https://freemarker.apache.org/docs/ref_builtins_hash.html and https://freemarker.apache.org/docs/ref_directive_list.html#ref.directive.list

Tested in https://try.freemarker.apache.org/

answered Apr 29, 2019 at 12:18

Sudarsanam V N

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