How to create JSON object dynamically?

Hugo Morillo 1 Reputation point


I have a workflow in Azure Logic App that execute an API call to get custom fields values from Trello card. Then, I put a 'for each' step to get the definition (field name) of every custom field. This is made by calling another method of Trello API. I want to create a JSON object based in the values I've got from these API calls. The format of JSON is as simple as:
"name1": "value1",
"name2": "value2",

Is there a way to achieve that in Azure Logic Apps?

Thanks in advance!

Azure Logic Apps
Azure Logic Apps
An Azure service that automates the access and use of data across clouds without writing code.
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  1. Hugo Morillo 1 Reputation point

    I've tried using setProperty inside Compose and later assign the output to a object variable, but doesn't work fine

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  2. Hugo Morillo 1 Reputation point


    This is the initial object with the json schema.

    I want to set the object properties inside a for each loop. I got the values of the fields from Trello API (returns an array like):

    [{"id":"5fbdb5da1626b7499d690ebf","value":{"date":"2020-11-09T15:00:00.000Z"},"idCustomField":"5fbdb5cee93a775e4a9405e5","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"},{"id":"5fa946e31680220774095ed9","idValue":"5fa9464bd260145aacba03ed","idCustomField":"5fa9462327f2c331a184a483","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"},{"id":"5fa946e0dafc5b7ead25411a","value":{"text":"Lilia Noemi Cabral"},"idCustomField":"5fa9454303ee497b7b99772a","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"},{"id":"5fa946bf8697d18d58b73ac1","value":{"text":"Tania"},"idCustomField":"5fa94518f410418c57662fd0","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"},{"id":"5fa946c3a2ee2771d26ba30e","value":{"text":""},"idCustomField":"5fa945088fc819708d157c5b","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"},{"id":"5fa946bc38b469081857ea9a","value":{"text":"Asuncion"},"idCustomField":"5fa944fe9d7af62b3806c8b6","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"},{"id":"5fa946b82bbaf938c4c3c341","value":{"number":"098234567"},"idCustomField":"5fa944e59527342399f460e2","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"},{"id":"5fa946b32aad4d323ba0648e","value":{"text":"Tania Cardozo Olivera"},"idCustomField":"5fa944d779089c6ca5cf534b","idModel":"5fa53d647b35d5744fd8b856","modelType":"card"}]  

    I put a for each step to iterate and parse the field value. I got the field name with another call to Trello API, which return this response:


    So, I matched the idCustomField to get the field name and field value. Now I want to set the property in the initial declared object.

    I've tried using a compose step with:


    And later set the variable object to the compose outputs, but doesn't work fine. The result object doesn't have all the properties set.

    What could I be doing wrong?

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  3. ChaitanyaNaykodi-MSFT 23,426 Reputation points Microsoft Employee

    Hello @Hugo Morillo , apologies for the delay. setProperty function updates the value of the existing property. Can you try using addProperty instead? the expression can be of the form addProperty(variables('TrelloMessage'),body('Parse_JSON')?['name'],body('Parse_JSON2')?['text']). Please let me know if the solution does not work, also it will be helpful if you could add some additional screenshots of the steps from your Logic-App designer. Thank you!

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