Ability to add columns after the intial creation of the view

[ryanchuleff]

I came across an issue when I tried to add an additional column to my child table and realized that the associated view also needed to be updated. As a stop gap, I modified your CreateTheViewForCITIEs method to do a "CREATE OR REPLACE VIEW ...." instead of just a CREATE which allows me to just add the method call in each subsequent migration where I add or remove a column. For the sake of readability by other coders who may not have known what I did, it would be good if you could override the add_column and remove_column methods so that it happens auto-magically. Would be good for ensuring that this key step doesnt get missed

[altrabio]

You are completely right, this point is neither mentionned in the documentation nor "automagically" taken into account. Consequently, I will try as soon as possible to :

1. mention this point in the documentation,
2. update the code and either override "add_column" and "remove_column" methods or propose a modification of the CreateTheViewForCITIEs methods just like you have done.

Thanks a lot for your feedback