AddProperty odata.etag

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Posted on by lukas.schauffele

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Hi All,

I am building up a JSON object and need to add the odata.etag property like so:

addProperty(variables('payload'), '@odata.etag', body('Get_Item')?['odata.etag'])

but I get the following error message:

Unable to process template language expressions in action 'Compose_4' inputs at line '1' and column '2957': 'The provided property name '@odata.etag' has these invalid characters '.'. The name cannot contain any of the following symbols: '[, ], .'.'.

I've tried stringifying it, puting it in a compose, setting the property rather than adding it, but it's all the same.

Anyone know of a workaround?

Thanks

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v-litu-msft on at

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Hi @LKS,

Since the "." is an invalid character to be added as a property name, so it is impossible to approach that directly.

As a workaround, you could add the "@odataetag" into it firstly, then use string() function convert the object to string, then use replace() function replace "@odataetag" to "@odata.etag", then use json() function convert it back to object:

addProperty(variables('payload'), '@odataetag', body('Get_Item')?['odata.etag'])
json(replace(string(outputs('Compose')),'@odataetag','@odata.etag'))

Best Regards,
Community Support Team _ Lin Tu
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WhiteHat 25 on at

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Another method would be to create a stand-alone object with the etag property (including the period) using the Compose action.

Then use the Union function to combine the stand-alone object with the target object (payload).

The union will result in a new object with all properties from both objects.

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