It's not a recalculation. It's instantiation. Instance data diverges from the factory data and needs to be independently editable.
Best, Casey Le jeu. 21 mars 2019 2:52 a.m., Derek <[email protected]> a écrit : > Permanently storing data that can be recalculated from existing data is a > practice specific to the needs of particular applications. > > Have you perhaps considered making use of the "view" table functionality > available in most databases? > > For example, in PostgreSQL you can create a materialized view which > "caches the result of a complex expensive query and then allow you to > refresh this result periodically." - see > http://www.postgresqltutorial.com/postgresql-materialized-views/ > > > On Tuesday, 19 March 2019 17:34:11 UTC+2, Dylan Young wrote: >> >> Hey all: >> >> I often find myself fetching data from models in the database only to run >> a few trivial calculations and store the info in a different model. >> >> Is there an established ORM pattern for directly creating objects in the >> DB based on the fields of other models? >> >> Sorry if this is obvious, but I couldn't find much on this in my web >> searching. >> >> >> Best, >> >> Casey >> > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/a1c55adc-c5fa-465c-8740-3a741bc22686%40googlegroups.com > <https://groups.google.com/d/msgid/django-users/a1c55adc-c5fa-465c-8740-3a741bc22686%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAPGJNu7ASaV803%2B%3DLZdK4K_xw_XfyP4bATrGqhgArmH5-T%2Bg%2BA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
