[richfaces-issues] [JBoss JIRA] Created: (RF-1870) Need to allow for single set of headers with datatable and embedded datatable

[David M. Karr (JIRA)]

Need to allow for single set of headers with datatable and embedded datatable
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                 Key: RF-1870
                 URL: http://jira.jboss.com/jira/browse/RF-1870
             Project: RichFaces
          Issue Type: Feature Request
    Affects Versions: 3.1.3
            Reporter: David M. Karr
            Priority: Minor


I have a need to present a datatable that models the information in a spreadsheet.  As such, some of the columns are "scalars", which represent a single value per entity, and some of the columns are multi-valued, such that multiple row values correspond to a single entity.

For instance, consider the notion of a "Project" entity with "name" and "department" fields, along with a "servers" list property.  Each server has "hostname", "cpuCount", and "platform" fields. I want to display a table with a single list of column headers, being "name", "department", "host name", "cpu count", and "platform" (and some others).

One row in the "projects" table will have an embedded table for servers.

In current functionality in v3.1.2, I can have a single header in the main datatable that corresponds to the embedded datatable (like "Servers"), and I can have headers in the embedded datatable (which would repeat for every project row), but there appears to be no way to just have a single set of headers representing all the existing columns unioned from the main datatable and the embedded datatable.

I've looked at the "subTable" component, but this doesn't appear to do what I need.

I will attach some artifacts that demonstrate what I'm trying to achieve.

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