How to print a table header and table data only if data is present in qweb reports

Question

How can I print a table header and table data only if the data is present in qweb reports.

If data is not present, table header and data should be empty

Answer 1

By using <t t-set="flag" t-value="0"> initialise a flag. Then check whether any data is present in the table data by using for loop.

If any data is present, set the t-value of flag inside the for loop as 1. Then print the table header and data only when the flag's value is 1