No return from my flow using Respond to a PowerApp

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Posted on by HenkVlootmN

I send a photo (bas64) to Power Automate by using this code:

Collect(PicResult;{JSONTable: StarliveFaceAPI_v1_test.Run(JSON_64)})

The Power Automate flow StarliveFaceAPI_v1_test contains three steps: PowerApp (V2), HTTP and Respons to a PowerApp or flow. The flows runs well, because Power Automate returns in Respond to a PowerApp or flow the requested JSON table. The output of the Respond to a PowerApp is set to Text and the parameter is named JSONTable, that uses the body of the HTTP request an there the JSON table.

I expect the JSON table to be placed as a table in the PicResult, column JSONTable collection. Unfortunately Power Automate only returns a blank row, no table. I tried to use SET in order te collect a variable, but that neither works.

Can anyone tell me what I am missing here? Thanks, Henk

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Building Power Apps

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BCLS776 8,994 Moderator on at

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It's cumbersome to get a table back from a flow, but it can be done. First, the documentation on this and have a look specifically at this section:

The next thing you need to do is wrap your JSON in a Table() function to separate the individual items into rows:

Collect(PicResult; { JSONTable: Table(StarliveFaceAPI_v1_test.Run(JSON_64)) })

Depending on your schema, you may be able to use the ForAll() as shown in the documentation to further parse. Parsing JSON record types is difficult with the current functionality I find and I often give up on trying to send back a valid JSON and instead send an array of expected types that is easier to parse.

Hope that helps,

Bryan

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HenkVlootmN 15 on at

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Adding the Table() function is not accepted by PowerApps since the run command is not a valid table. In my opinion this is not the problem, since this is a base64 text string that is accepted in Power Automate. I'm looking for the return value into the collect(ion). I have a JSON table returned and even change into a text value, but I don't see the return value (flow1.png). The result in PowerApps is an empty row (Flow2,png)!

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HenkVlootmN 15 on at

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I never found such a stupid solution. If you have changed a flow you need to refresh the flow in PowerApps. So change your flow, save the flow and then refresh the flow in PowerApps. Thank you for your help!

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