RRNEntityRelationalTable Entity

Scoped name

WSYBASE/RRNEntityRelationalTable

Overview

The fetch view of the entity scopes a function RRNEntityRelationalTable.Fetch.WsyStatelessBlockFetchRRN, that can be used in the grid components used by the WebsydianExpress Ext JS framework.

This function inherits from the standard StatelessBlockFetch function. The function adds the necessary handling of a relative record number position functionality, which makes it possible to use an existing BlockFetch function for retrieving grid data for the Ext JS for WebsydianExpress framework.

Implementing

You can implement this in three different ways.

1. If you want to have a WsyStatelessBlockFetchRRN function for your Fetch view, you can let the entity inherit directly from the RRNEntityRelationalTable entity:

2. If you want another view to have the BlockFetchWrapperRRN function (when you want another sort of the grid).

In this case you can let the view inherit from the DataAccessRRN.Fetch view:

3. If you want to have the BlockFetchRRN wrapper under a view, but can't create the "is a VW" triple because you already has got such a triple, you can create a new function for the view, let the function inherit directly from the view, and replace the abstract view on the function.

Inheritance for functions to generate and build

Just as for a standard StatelessBlockFetch function, you must add inheritance from ServerExternal as well as setting an implement Yes triple for the function before you are able to generate and build the function:

Alternatives

This function is the recommended way to provide the functionality for retrieving grid data for the Ext JS WebsydianExpress framework.

However, in some cases you might want to reuse a normal BlockFetch function for retrieving these data. This is possible using the DataAccessRRN.Fetch.BlockFetchRRNWrapper function.