Primefaces static and dynamic columns in datatable

Question

I am using Primefaces 5.0 to create a dynamic datatable.

My DataObject has some required fields and a List of optional \"tupel\" (key-value pair). The optional list

Answer 1

It isn't possible to define columns based on row data. Imagine that row 1 has 2 columns, row 2 has 6 columns, row 3 has 1 column, etc how would you ever produce a technically valid table in HTML? Each row must have the same amount of columns.

You've 2 options, depending on whether can change the model or not:

1. If you can't change the model, then you need to replace that by a single and loop over the #{data.optionalValues} using a nested loop with e.g. or perhaps even another :

   
       
           
               #{opt.value}
           
       
   
   

2. If you can change the model, then you need to let point to a bean property instead of to a row property, so that it's exactly the same for every row. This works if you replace List optionalValues by Map optionalValues where the key is Tupel#id and add a List property to the bean containing all available Tupel#id values.

   
       #{data.optionalValues[id].value}