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Pass JSON array variable to a string variable in a child flow

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Posted on by sa105

I am building a workflow and I have an array of JSON objects stored in a array type variable.

I have created a child flow that accepts the same JSON array as a parameter but I can't pass an array due to limitation on child flow, I have to pass that array as a string.

Is there any way to pass array to a child function as as string or nay other way? Something like JSON.stringify(ArrayVariable) in flow.

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Building flows

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efialttes 14,756 on at

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Hi!

Assuming you have your array stored in a varaible called 'myOutputArray', I would try with the following WDL expression:

string(variables('myOutputArray'))

Not in my laptop, unable to test

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michaelshparber 111 on at

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@efialttes
How do I convert this string back to an array inside the child flow?

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sa105 36 on at

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in the child workflow, create a Parse JSON action and specify the schema of you JSON array and pass string as input parameter.

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ericwhitley 137 on at

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This method works for me, even on large datasets.

I set this for a connection to a Shared Calendar and I can pass 143 events to a Child flow. (I can't get the connector to grab more than 143 events at a time but I bet it would handle more. Eventually you may run into size limitations for the string.)

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aallen5658 18 on at

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What if my Parse JSON is giving the error below? I used the output from the trigger of the child flow to generate a schema.
[
{
"message": "Invalid type. Expected Object but got Array.",
"lineNumber": 0,
"linePosition": 0,
"path": "",
"schemaId": "#",
"errorType": "type",
"childErrors": []
}
]

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