Forum Discussion

kavithams's avatar
kavithams
Guide
7 years ago

Freemarker replace string operation does not work inside a function

We need to replace certain characters in a string in freemarker. Generally we do this. <#assign message = message?replace("old","new") />   But this replace operation does not work when used with ...
  • TariqHussain's avatar
    TariqHussain
    7 years ago

    kavithams - Small edit in your code and it worked fine. Strange but you have to use a different variable inside a function.

     

    Before

     

    <#function replaceVal msg>
      <#assign msg = msg?replace('following ','FOLLOWING') />
      <#return msg />
</#function>

     

     

    After

     

    <#function replaceVal msg>
      <#assign repleacedText = msg?replace('following ','FOLLOWING') />
      <#return repleacedText />
</#function>

     

     

    Also, you if you want to ignore case-sensitive, you can pass another parameter  'i" as mentioned by PerBonomi

    E.g

     

    <#assign repleacedText = msg?replace('following ','FOLLOWING', 'i') />

     

TariqHussain's avatar
TariqHussain
Boss

kavithams - Can you please share dummy text which you trying to replace and couldn't replace with function?

 

I tried to replace a string using your code and it worked without any issue. 

 

 

<#assign message = "this is old value" />
<#assign message = message?replace("old","new") />

${replaceVal(message)}

<#function replaceVal message>
     <#assign message = message?replace("old","new") />
     <#return message />
</#function>

I got result "this is new value". 

 

 

You can try this function here 

kavithams's avatar
kavithams
Guide
7 years ago

 

TariqHussain Thank you for your reply.

I'm sharing the the code lines below. I have this code within an endpoint between; if this info helps in anyway. The null variable "surveyUrl" uninitialised is intensional so as to throw a required exception to try "replace" with.

 

<#attempt>

<script type= text/javascript>

window.location.href="${surveyUrl}";
</script>

<#recover>
<#assign errorMsg = .error/>
<#assign msg = errorMsg?replace('following ','FOLLOWING') />
<#--<#assign msg = msg?replace("'","\'") />-->
msg : ${msg}<br>

<br>calling function replaceVal...<br>

msg : ${replaceVal(errorMsg)}

</#attempt>

 

<#function replaceVal msg>

<#assign msg = msg?replace('following ','FOLLOWING') />
<#return msg />
</#function>

  • TariqHussain's avatar
    TariqHussain
    Boss
    7 years ago

    kavithams - Small edit in your code and it worked fine. Strange but you have to use a different variable inside a function.

     

    Before

     

    <#function replaceVal msg>
      <#assign msg = msg?replace('following ','FOLLOWING') />
      <#return msg />
</#function>

     

     

    After

     

    <#function replaceVal msg>
      <#assign repleacedText = msg?replace('following ','FOLLOWING') />
      <#return repleacedText />
</#function>

     

     

    Also, you if you want to ignore case-sensitive, you can pass another parameter  'i" as mentioned by PerBonomi

    E.g

     

    <#assign repleacedText = msg?replace('following ','FOLLOWING', 'i') />

     

    • kavithams's avatar
      kavithams
      Guide
      7 years ago

      Using a differently named variable inside function is really strange but your solution worked great for me. Thank you.

      • PerBonomi's avatar
        PerBonomi
        Boss
        7 years ago

        I just remembered. inside a function use <#local var = />, instead of <#assign var =.

        That shouldn't override the pre-existing variable and keep it inside the function.

        You know, in case you want to use the same variable name.