On 25/03/11 10:25 PM, Israel Ben Guilherme Fonseca wrote:
I'm using it for a stand alone APP, no rails. I didn't know about this repository function. Does it MUST be used for every database conversation in an standalone app?
only if you want the identity map, otherwise no.
2011/3/24 Xavier (DBIYF) <[email protected] <mailto:[email protected]>> On 24/03/11 11:13 PM, Israel Ben Guilherme Fonseca wrote: Hello, Maybe what I'm asking don't make sense to the Datamapper context, but here it goes: In SQLAlchemy and Hibernate there's the concept of session context, where an IdentityMap have references to the entities that are attached in the the current session context. In these frameworks you have to eventually make a session.clear() or session.close(). You normally use a clear() in Hibernate to make batch inserts. Anyway, my question is: is there any similar concepts in datamapper? I didnt find anything in the docs. If i had a DAO like this: class PessoaDAO def insert(pessoa) pessoa.save end end I could call this 1 million times without the fear of filling my system memory?(Without a clear this would happen in hibernate, and without autocommit i think that too would happen in SQLAlchemy. The identity map is only used when you are explicitly inside a repository block: DataMapper.repository(:default) do # Identity map used here end # Cleared by here, and not used anymore If you called 1 million inserts inside the block, then yes your memory would fill up. If you are using datamapper with rails and insert the identity map middleware, you get an identity map for the scope of one request. Hope that helps, Xavier -- You received this message because you are subscribed to the Google Groups "DataMapper" group. To post to this group, send email to [email protected] <mailto:[email protected]>. To unsubscribe from this group, send email to [email protected] <mailto:datamapper%[email protected]>. For more options, visit this group at http://groups.google.com/group/datamapper?hl=en. -- You received this message because you are subscribed to the Google Groups "DataMapper" 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/datamapper?hl=en.
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