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Anonymous
Not applicable

For Each loop cannot read JSON array

I can't figure out what's going wrong here. I have a flow set up to get the items from a SharePoint list, then parse the JSON of that output. Then, a for each loop is supposed to get the "value" array from that parsed JSON. Power Automate complains that the array is null, but when I look at the output of the parse JSON action, it is most decidedly not null.

Screenshot 2021-01-08 at 13.24.25.png

This is the error that Power Automate is throwing.

Screenshot 2021-01-08 at 13.24.54.png

This is the beginning of the output from the parse JSON action.

There is clearly something in the array, but Power Automate insists it's null. For the schema of the parse JSON action, I simply copied the output from the "get SharePoint list items" action into the "generate schema from sample" box of the parse JSON action. What's going on?

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Pstork1
Most Valuable Professional
Most Valuable Professional

Unfortunately, that's not the actual JSON representation for that .  That's why the error says its null.  If you want to use the output of the Parse JSON you can see the JSON for the value in the screenshot.

image.png

And if you want to do it directly from the Get Items then its.

image.png



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Pstork1
Most Valuable Professional
Most Valuable Professional

I suspect you are loading 'body' from the Parse JSON into the Apply to Each rather than the 'value' dynamic content.  Body will load root metadata in addition to the array of items.  For the Apply to Each you need just the items.



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Anonymous
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Hi, @Pstork1.

I'm confused. By referencing body([stuff])?['body']?['value'] aren't I explicitly telling it to ignore all that metadata, and pay attention specifically to the value array within the body object?

Pstork1
Most Valuable Professional
Most Valuable Professional

Unfortunately, that's not the actual JSON representation for that .  That's why the error says its null.  If you want to use the output of the Parse JSON you can see the JSON for the value in the screenshot.

image.png

And if you want to do it directly from the Get Items then its.

image.png



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Anonymous
Not applicable

That's not what my parse JSON schema looks like... When I copy the output from the get items action into the "generate from sample" box of the parse JSON action, I get a schema that looks like this...

Screenshot 2021-01-08 at 14.03.01.png

 

Anonymous
Not applicable

Just had a similar issue and was able to correct it by adding null value as part of the scheme 

ss.PNG
Anonymous
Not applicable

Hi, @Anonymous.

I don't think that is the issue with my flow. The problem is that the value array is not null, but Power Automate thinks it is. That array is never null, and shouldn't be, so adding the null value to the type wouldn't affect it.

@Pstork1 thinks it's because I'm having the for each action pull the metadata outputted by the parse JSON action. However, I don't know how to reference the ['body']?['value'] array otherwise. Everything is contained in an object called "body," itself within the body of the JSON.

Pstork1
Most Valuable Professional
Most Valuable Professional

Take a look at my second screenshot.  If you look at the tooltip you will see the correct JSON to pull the value property directly from the Get_Items Action.  The JSON you are using is incorrect and that is why Power Automate is saying its null.



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Anonymous
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@Pstork1 

Yup. I referenced the get items action directly, and now it seems to flow through that for each action. Now I have to go through the rest of my flow to rewrite everything that refers back to that parse JSON action, so I can remove it. Thanks for the help. I'll mark your first response as the solution.

I don't understand why the parse JSON action is ruining the JSON coming out of the get items action. It makes no sense to me, and makes it much more difficult further on in my flow, since the get items action is dynamically sourced—Power Automate doesn't know the schema of the data it's pulling until it's actually pulled at runtime. I'll need to rewrite all the formulas manually, instead of using the dynamic content dropdown. *sigh* I'll stop before I go off on another anti-Microsoft rant...

Pstork1
Most Valuable Professional
Most Valuable Professional

I would create your Parse JSON schema again.  Its not what it should be.  You've got an extra layer of object that got in there from somewhere.  I loaded the body directly from the Get Items and you can see how mine is different from yours.  Somehow your schema got misconfigured.



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Anonymous
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No, I think something is happening on the SharePoint side of things. When I look at the output of the get items step, that output has the extra layer of object in it. I'm rebuilding anyway, because I have an idea to make the flow more efficient.

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