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adding a JSON URL parameter


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The JSS v7.1.0 User Guide->Data Adapters->Configuring a Parameter Using the Data Adapter Tab in the Dataset and Query Dialog isn't clear about how to add a parameter that uses JSON.

I have a working Data Adapter with all of the needed URL parameters hard coded. I want to override the json_data={"operation":"list_operations"} URL parameter in the report design view with a new JSON Value as needed. The json_data Parameter Name would remain unchanged.

Attempting to use the JSON as the Default Value Expression throws a compile-time error like "Expression expected instead value = {"operation":"list_operations"}; //$JR_EXPR_ID=0$"

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