In answer to your first question, yes but with a difference. When you update the schema in a RDBS it affects all the rows in the underlying table. Not so with datastore. The datastore entity instance is more like a dynamic object that will accept any valid property type and associated value without requiring all other instances of that entity type to have the same properties. When querying the datastore entities that do not have properties referenced by the filters are ignored and excluded from the query.
On Wed, May 19, 2010 at 2:37 AM, Marcus <[email protected]> wrote: > Hi all, > > As I have recently been given a whole new project to work on, with > free hands to use whatever "tech" i like, I'm pondering to move all > the code to GAE. I do have a couple of questions, hoping that somebody > can clear them up for me. (Note: I know that I'm still thinking > traditional RDBMS below, but I need to think in those terms for now) > > > 1. Let's say I have an entity, Account, that I have been using for > some time, and there is a lot of data in datastore that is mapped to > Account, then one day the I want to add a new attribute to account, > let's say "age". Usually, I would add the attribute to my class, and > then add the column in my RDBMS, redeploy, and all is well. How would > this be solved using datastore ? > > 2. Is it possible to tell GAE never to restrict access to my > application (that is, I don't want any limits att all on number of > request, no matter the cost). > > 3. Yesterday when trying to access the admin panel for appspot.com it > asked me for SMS verification again, how often does this happen ? > > I'm sure I have a million more questions, but let's start with these. > > Thanks in advance for your answers. > > Kind Regards > Marcus > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > -- -- Jeff -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
