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Power Automate - Using Flows
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Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

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Posted on by 134

Hi All, This error keeps bugging me. Something is wrong with my expression.

When I try the expression separately using Compose action to test it, it works. (Expression shared below)

However, when I use it in SharePoint 'Update Item', it failed. Reason being:

Unable to process template language expressions in action 'Update_Status_after_approved_by_manager_or_partner' inputs at line '1' and column '3335':

'The template language expression <EXPRESSION> cannot be evaluated because property 'approverResponse' cannot be selected. Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details."

 

Basically, my expression is trying to populate the value of the first item and second item of the array (AllResponses) to my 'Approval History' column, with IF function to make it error-proof:

The expression below for pulling the first respondent result,

 

if(empty(variables('AllResponses')?[0]),'',
concat(
 If(equals(variables('AllResponses')?[0]?['approverResponse'],'Approve'),'‌‌ Approved by - ','‌‌ 
 Need more information by - '),
 variables('AllResponses')?[0]?['responder']?['displayName'],
 ', ',
 convertFromUtc(variables('AllResponses')?[0]?['responseDate'],'Singapore Standard Time','M/dd/yyyy h:mm:tt'),
 ': ',
 variables('AllResponses')?[0]?['comments']))

 

Result of my expression will be: 

bradt30h_0-1631714248675.png

 

Since the error stated: property 'approverResponse' cannot be selected.

Therefore, I tried to parse my variable('AllResponses') and notice that the item type for 'approverResponse' is string 

 

{
 "type": "array",
 "items": {
 "type": "object",
 "properties": {
 "responder": {
 "type": "object",
 "properties": {
 "id": {
 "type": "string"
 },
 "displayName": {
 "type": "string"
 },
 "email": {
 "type": "string"
 },
 "tenantId": {
 "type": "string"
 },
 "userPrincipalName": {
 "type": "string"
 }
 }
 },
 "requestDate": {
 "type": "string"
 },
 "responseDate": {
 "type": "string"
 },
 "approverResponse": {
 "type": "string"
 },
 "comments": {
 "type": "string"
 }
 },
 "required": [
 "responder",
 "requestDate",
 "responseDate",
 "approverResponse",
 "comments"
 ]
 }
}

 

Is this the reason why I wasn't able to call/select the JSON child? As the parent the has a different type

parent  = 'object'

child ie approverResponse = 'string'

 

I haven't been able to find a solution to handle this. Appreciate it so much if you can give me some clue!

Thanks for reading!

 

  • 23063375pt Profile Picture
    2 on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hi, 

    while creating HTML table for my data , i am facing the issue of running the flow for data operation , 

     

    what i need to select in 'FROM' box 

    23063375pt_0-1679749726594.png

     

     

  • Verified answer
    bradt30h Profile Picture
    134 on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    @DamoBird365 !!! I solved it!!! oh my god thanks so much for pointing me to the right direction!

    I used this formula to convert it to correct Array.

    json(replace(outputs('Compose'),'\',''))

    I can't express how helpful you are... Once again thanks so much Damien. 

    Please keep up your YT content, appreciate I could learn from you.

  • bradt30h Profile Picture
    134 on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hey Damien,

    Wao, interesting, outside it shows like array when showing raw input, It is a string...

    To me, this seems like a bug, when I stacked all the responses into one...

    bradt30h_0-1631870312802.png

    "[{\"responder\":{\"id\":\"22584fd1-0b70-481b-b5c6-59070aedf863\",\"displayName\":\"Bradley Teoh\",\"email\":\"bradleytest@gmail.com\",\"tenantId\":\"5b973f99-77df-4beb-b27d-aa0c70b8482c\",\"userPrincipalName\":\"bradleytest@gmail.com\"},\"requestDate\":\"2021-09-17T09:14:25Z\",\"responseDate\":\"2021-09-17T09:14:58Z\",\"approverResponse\":\"Approve\",\"comments\":\"soso\"}]"

     

    So I need to convert it to an array... I tried select but no help either. 😭

    bradt30h_2-1631870680867.png

     

    bradt30h_1-1631870489864.png

     

  • Verified answer
    DamoBird365 Profile Picture
    8,942 Microsoft Employee on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hi @bradt30h 

     

    The error relates to your array being recognised as a string.  You can see from the screenshot that the array is displayed and recognised as a string because it is flat and not formatted. There must be a rogue character or missing bracket in your compose output.

     

    can you screenshot the output from “show raw inputs” of the compose? Can you also copy and paste the array/string from that same window? 

    Damien

  • bradt30h Profile Picture
    134 on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hi @DamoBird365,

     

    My approval flow works depending on what is the value selected by User who submit the form. I have 3 types of option, so each option will have different content being populated in Approval for reviewer to approve. Theoritically, I have 3 approval, but I also built error-proof approval below that (as there is limit in Approval attachment). Hence, I have 6 Approval. 

    No matter what, in the end, there is only one approval outcome, depending on which type of approval User submitted. Thus, I tried to consolidate everything into one variable. 

     

    Now, I tried Union, but out of the 6 approval responses, only 1 has content, the Union fail as the other responses return value are being empty. 

     

    I also tried, compose to consolidate the data instead of Append Array. Fortunately, the array remain array.

    bradt30h_0-1631853486329.png

    But later when writing into SP, an error comes again. 😢

    InvalidTemplate. Unable to process template language expressions in action 'Update_Status_after_approved_by_manager_or_partner' inputs at line '1' and column '3336': 'The template language expression

    'if(empty(outputs('Compose')?[0]),'', concat(If(equals(outputs('Compose')?[0]?['approverResponse'],'Approve'),' Approved by - ',' Need more information by - '), outputs('Compose')?[0]?['responder']?['displayName'],', ', convertFromUtc(outputs('Compose')?[0]?['responseDate'],'Singapore Standard Time','M/dd/yyyy h:mm:tt'),': ', outputs('Compose')?[0]?['comments']))'

    cannot be evaluated because property '0' cannot be selected. Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.'.

    bradt30h_1-1631853537926.png

  • DamoBird365 Profile Picture
    8,942 Microsoft Employee on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hi @bradt30h 


    An observation at my end is that if I paste your sample array into a variable array, it parses ok, the history output is neatly formatted/beautified and your if expression works fine from a compose. I’ve tried this myself.

     

    looking at your screenshots, the history of the array is not formatted correctly.  I don’t grasp what you are doing with your append array action. A select would allow you to select the keys values from the responses and if you have two approvals, potentially union would help you bring those two arrays together. I can’t help but think you’ve created an odd array. Very hard for me to diagnose.

     

     You need to walk through the history and check to see where the format goes wrong.

     

    Damien

  • bradt30h Profile Picture
    134 on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    As I use parse json, i got the error, my input content is:

    [
      "[{\"responder\":{\"id\":\"22584fd1-0b70-481b-b5c6-59070aedf863\",\"displayName\":\"Bradley Teoh\",\"email\":\"bradleytest@gmail.com\",\"tenantId\":\"5b973f99-77df-4beb-b27d-aa0c70b8482c\",\"userPrincipalName\":\"bradleytest@gmail.com\"},\"requestDate\":\"2021-09-16T07:35:48Z\",\"responseDate\":\"2021-09-16T07:35:55Z\",\"approverResponse\":\"Approve\",\"comments\":\"welldone\"}]"
    ]

    bradt30h_0-1631778067106.png

    Thus, I wrap it up with json, 

    bradt30h_2-1631778356197.png

    But the error persists,

    bradt30h_1-1631778177495.png

    Am I using the correct formula?

  • bradt30h Profile Picture
    134 on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hi Damien,

    You are absolutely right, I copied the array in my test.

    The reason I use the variable is to consolidate multiple "start and approval" actions responses (multiple approvals for error handling purposes).

     

    This is the output from the Append array variable:

    [{"responder":{"id":"22584fd1-0b70-481b-b5c6-59070aedf863","displayName":"Bradley Teoh","email":"bradleytest@gmail.com","tenantId":"5b973f99-77df-4beb-b27d-aa0c70b8482c","userPrincipalName":"bradleytest@gmail.com"},"requestDate":"2021-09-16T06:43:38Z","responseDate":"2021-09-16T06:44:33Z","approverResponse":"Approve","comments":"well done"}]

  • DamoBird365 Profile Picture
    8,942 Microsoft Employee on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hi @bradt30h 

     

    I would agree that it's your array that is at fault.  I am guessing that in your test, you copied the array?  But with your live, you are appending?  Can you copy and paste the output of the append to array variable in full?  The very fact that the parse json is escaping values, means that it too is treating the whole value supplied as input as a string.  I don't use variables myself personally, more of a compose fan but I would have thought that a variable of type array would error first. 

     

    You can wrap a string in json() to remove escaped characters but I think it would be worth seeing the output as a copy/paste of the text, rather than image, so that it can be looked at in a beautifier.  Something you see in my video 😉

     

    Damien

  • bradt30h Profile Picture
    134 on at
    Re: Update Item SP Error - Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.

    Hi Damien, 

     

    Thank you so much for putting effort into reviewing my issue! 

     

    However, the error remains. 

    bradt30h_1-1631774867319.png

     

    I also tried to parse JSON earlier, but fail as well. Notice the Json array being covered with [ ] and turn my variable into string, as below. 

     

    bradt30h_0-1631773950663.png

    Could this be the issue?

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