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At wits end with Logic App Substring - PLEASE HELP

Hi 

We have some addresses that are greater than 30 chars and I have to truncate those to 30 chars max.....what I am trying to do is

 

"Condition_2": {
                                "actions": {
                                    "Set_variable": {
                                        "inputs": {
                                            "name""Address",
                                            "value""@{substring(body('Parse_JSON_2')?['address1'],0,29)}"
                                        },
                                        "runAfter": {},
                                        "type""SetVariable"
                                    }
 
The error I am getting is: PLEASE HELP! Thanks Mike Kiser
Unable to process template language expressions in action 'Set_variable' inputs at line '1' and column '2956': 'The template language function 'substring' parameters are out of range: 'start index' and 'length' must be non-negative integers and their sum must be no larger than the length of the string
9 REPLIES 9
Jcook
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Most Valuable Professional

Hello @mikekiser 

 

Have you tried to use the substring action? For complex subscribe expressions, it can be very useful.


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Jcook
Most Valuable Professional
Most Valuable Professional

@mikekiser  Here is a blog on the substring action:

https://flowaltdelete.ca/2020/07/14/power-automate-substring-and-text-positions-made-easy/


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Thanks. I did try the SubString but must have been doing something wrong. I'll read the blog; thanks for your post!
Mike

Hi,

I am trying to use this after reading the blog but I am getting a syntax error

 

substring(variables(Address),0,9)
 
 
It looks good to me; any ideas?
Thanks
Mike
Jcook
Most Valuable Professional
Most Valuable Professional

@mikekiser 

 

Try changing to:

substring(variables(Address),1,9)

 

I dont think substring() uses array indexes.


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Thanks for your response but it still failed

 

error:

InvalidTemplate. Unable to process template language expressions in action 'Set_variable' inputs at line '1' and column '2956': 'The template language function 'substring' parameters are out of range: 'start index' and 'length' must be non-negative integers and their sum must be no larger than the length of the string. Please see https://aka.ms/logicexpressions#substring for usage details.'.

 

code:

"Condition_2": {
                                "actions": {
                                    "Set_variable": {
                                        "inputs": {
                                            "name""Address",
                                            "value""@{substring(body('Parse_JSON_2')?['address1'],1,29)}"
                                        },
                                        "runAfter": {},
                                        "type""SetVariable"
                                    }
                                },
Jcook
Most Valuable Professional
Most Valuable Professional

@mikekiser  In the run of that error. Could you share the parse json2 address1 property value.

 

I want to confirm what is in the address1 property.


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Jcook
Most Valuable Professional
Most Valuable Professional

Hello @mikekiser 

You are getting this error if the string you're trying to substring is too short.

Try adding a condition to check for this before doing the conversion

Please take a look at my POC:

 

Keep in mind I am using lots of Compose actions to show what is happening. You can use less for your solution

 

First I get the length of address1

Than I use a IF condition to check if address1 is greater than 30 chars

Jcook_0-1596247991095.png

 

If True:

Use the substring() expression on address1 

my expression is:

substring(outputs('Compose_-_address1'),0,30)

Jcook_1-1596248207107.png

 

If False:

Do nothing

 

Run:

with address1= This Address is too short

Jcook_2-1596248386121.png

 

Run:

With address1 = This Address is too long and will be trunked

Jcook_3-1596248480598.png

 


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Jcook
Most Valuable Professional
Most Valuable Professional

Hello @mikekiser 

 

Did you have a chance to try my solution?


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