topic Re: Change a name model or prefix produces internal inconsistences in Alfresco Archive

Change a name model or prefix produces internal inconsistences

dmralfing — Wed, 11 Sep 2013 13:14:33 GMT

I don´t understand why, but sometimes when I change the prefix or name of any content model, it´s like my alfresco get crazy. When I restart, it appears errors like "a namespace prefix is not registered for uri …" referenced a URI that I´m not already using. I have been looking for this error around

Re: Change a name model or prefix produces internal inconsistences

mrogers — Wed, 11 Sep 2013 22:44:09 GMT

In general updating models is not allowed and needs to be handled carefully.

The model definitions are parsed and stored in the database. A missing model (or changed namesapace) will not delete the old. But will probably cause a warning that there is a model missing.

There are some update operations that you can do safely such as adding new optional properties. But if a namespace/type/aspect/property is in use then you need to be careful and migrate your data. Alfresco, at the moment, perhaps over simplifies things by not allowing many types of model updates. And its this way to prevent "inconsistencies".

There's a need for a dictionary/data management API to assist with model maintenance but its not there at the moment.

Re: Change a name model or prefix produces internal inconsistences

dmralfing — Thu, 12 Sep 2013 07:06:00 GMT

Thank you very much mrogers. It makes sense what you tell me that if I change a model while there is instances of this model created in the repository, it would produces inconsistences, I already knew this fact and I accept it.
My question is considering that it doesn´t exist any instance created with this model, being a new model. So when I changed the namespace/prefix my Alfresco gets crazy and doesn´t start - not warnings, I promiss you that it didn´t start -. Alfresco should have at least any way that let you tell him "update models information in the database". Or at least, I would appreciate if you tell me where can I find the table where I have to do it manually?. I want to insist in the fact that my Alfresco didn´t start while I had not created instances of the model.
It was no problem because there was a local test environment - standard installation of Alfresco Enterprise 4.1.2 using the PostgreSQL -, but I am afraid I might have this kind of problems in any other more sofistified environment with Oracle 11g in production, in the future.
Thank you so much again