Append to Array Variable action is not working

[martinav]

This is not complex.  But it doesnt work.  Whats the deal?

Simplified for sake of example:

The format of the ouput is perfect.  The action lies.  Why?

[martinav]

Parsing first also fails:

Output is the same, still no go.  wtH?

[RezaDorrani]

Hi @martinav 

ECN is the part number property?

Your parse json will retunr an array of objects containing doc id and part number

In order for you to add all this data to another array

you would have to loop through each array in the parse json output

Apply to each - Output from parse json

and within apply to each do append to array with value "item()?['PartNumber']

Regards,

Reza Dorrani

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[martinav]

@RezaDorrani ,

Thanks for your reply.

DocumentID and PartNumber are properties of an ECN.  

I'm not exactly sure what you are referring too, but yes, there is an apply to each involved.  That part is not a problem.  The single task of appending the current value to the existing array is what is not working.  

I cannot find anything in the flow documentation regarding the Append to Array Variable action and syntax.  I did some more messing around and found that the input is wanting the values WITHOUT square brackets.  The Problem is, none of these actions make an output without them.  Seems pretty rediculous.  It seems there are different people developing actions that dont interface well together.  So the question is... how do you get parse json or a Select action without square brackets?

Here is my example of the only way I could get Append to Array to work:

TestOutput shows the desired result.

[
  {
    "DocumentID": 10,
    "PartNumber": "342134"
  },
  {
    "DocumentID": 20,
    "PartNumber": "475478"
  },
  {
    "DocumentID": 30,
    "PartNumber": "857412"
  }
]

[RezaDorrani]

Hi @martinav 

The select action itself gives you an array of objects

If you run apply to each directly on the select output

and then use append to array within the loop 

just add "item()" as expression to append to array in the loop

This should work

Regards,

Reza Dorrani

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[martinav]

@RezaDorrani ,

Well, i do understand what you are saying, but I'm not smart enough to get it all right.  I put Item(body('Select')) in a Compose so I could see what it is doing... or not doing, in my case.

Result:

[RezaDorrani · Accepted solution]

@martinav 

You would have to do a for each on the select action output as well

After your select action

add a loop using output from select action

and within that loop use append to array

expression for append to array would just be "item()"

Regards,

Reza Dorrani

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[martinav · Accepted solution]

@RezaDorrani ,

I was just about to give this up...  It took me forever to get what you were trying to tell me.  I would love to know how you knew how to do this.  This is ENTIRELY non-intuitive.  Even with you explaining it, and having used ALL of these actions and commands before, it took a couple of hours to get it all together.  I have no idea how this was ever figured out.  Its almost as difficult as the first dude figured out calculus.

Here is what finally worked, and when I review, its exactly what you were describing.

Just to clarify item() is just that... item().  There is nothing in the parenthesis, as what was mentioned in an earlier post.

[RezaDorrani]

@martinav 

The trick is in the expressions. I have done a lot of work around expressions which has helped me get familiar with it. I almost always avoid parse json and use expressions to navigate objects which helps you to gain more insights into the way expressions work

Select always returns an array of objects 

In order to evaluate each object within the array we need a for loop

Since you needed to append each object from the array into an array variable

We used the item() property which gives the current running item in the for loop

item() property is an imp expression to know of

Im glad that your code worked 🙂

Regards,

Reza Dorrani

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[MarineFlow]

This has saved me, THANKS!

[xbommer07]

I have this working in my flow now as well. one question. How do I format this to be a table in an approval task? 

This is what is displayed on the approval task email. 

[{"Description":"Testing Update L1","Cost":5.0},{"Description":"Testing Update L1","Cost":5.0},{"Description":"Testing L2","Cost":6.0},{"Description":"Testing L2","Cost":6.0}]

[martinav]

@xbommer07 ,

This might get you a boost to where you want to go.

https://powerusers.microsoft.com/t5/General-Power-Automate/Create-HTML-Table-from-Array-of-Strings/t...

[xbommer07]

@martinav 

Thank you for providing the link. I tried this yesterday before posting and I do not believe I understand the post on that link. The more i dig into this problem I am having I think I may have chosen the wrong approach entirely. 

I am using the Power Apps Expense Approval template and am trying to get the line items to show in the approval task. If you have not seen this template before it uses two sharepoint lists, one to keep the expense report (Expenses) and another to store the itemized line items (LineItems) of the expense report. 

I am simply trying to lookup on line items where ID on Expenses is = to ReportID on Lineitems. Then show two columns on the approval email (Description, Cost)

It seams adding the 2nd list as get items has complicated the entire thing more than I feel it should be. 

Any ideas would be appreciated. 

[martinav]

@xbommer07 ,

Oh, I totally  get it now.  In SQL lingo, you are wanting to basically to an JOIN between two tables.  This is crazy easy, but counter easy in Flow.  Look at this link.  I am doing this very thing with even three different sources.  

Give some love to @DeepakS for this.

https://powerusers.microsoft.com/t5/General-Power-Automate/Looking-for-expression-to-join-arrays/m-p...

[maishm]

If your output after you do 'Select' is in the format you want, you simply have to initialize the output as an array variable.
The append to array function assumes that each item is in a string/integer format so when you pass an array to it, it throws the error.