I've made a Pull Request in processing plugin with a new GeoAlgorithm. https://github.com/qgis/QGIS/pull/1753
Can someone take a look at this (volaya or alexbruy), we would like it to be pulled before feature freeze.
Objective of this new QGIS GeoAlgorithm is to provide a user friendly tool to refactor layer fields.
It takes a standard ParameterVector as input. From there, the user can : * Change some field's names or type. * Add or delete some fields. * Reorder fields. * Calculate new fields based on expressions. The result is write through a standard OutputVector parameter. This GeoAlgorithm can be used in modeler. Arnaud
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