My use case is i need to create editable grid for 100 columns from one table.While building interface type of data is fixed it could be TextIntegerDrodpownDateI need to use foreach to loop component to store data but all columns are not mandatory to store data.How do i save data? because after .(dot) i need to pass column name.
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This explains all ways to fetch values from fields.
https://docs.appian.com/suite/help/21.2/Expressions.html#variables
Be aware that the dot-notation and square-bracket notation return a reference to the value while index() returns a copy and you cannot store data into the copy of a value. To dynamically store data into a CDT you would use square brackets.
You are aware that a grid with 100 columns will have very bad performance? Why no master-details pattern?