Hi Mohit,
The only situations where I have used strings are forward declarations or
potential reference loops.
Intuitively I'd say that referencing models by their name adds a slight
overhead for class lookup. But since this is supposed to happen only when the
model definition is loaded (fields are class level attributes), there are
chances that there is no impact on performances during the application normal
operation. The impact should be on the application start phase, but it's
probably neglectable compared to the overall start time.
Since I've never done any real timing about this point, nor studied Django
source code to identify the real mechanism, I'm strongly interested in other
opinions... especially if my analysis is wrong 😉
Best
Eric
________________________________
From: django-users@googlegroups.com <django-users@googlegroups.com> on behalf
of Mohit Solanki <mohitsolanki...@gmail.com>
Sent: Sunday, April 7, 2019 05:43
To: Django users
Subject: Specifying model relationship as string vs concrete model?
Since Django provides two ways of specifying model relationship,
models.ForeignKey('User') vs models.ForeignKey(User)
Which one is more preferred and recommended? Is there any upside or downside of
choosing one over the other? In Django documentation, all the example are of
the second form but I have seen many people specifying the relationship as a
string. Can Someone please elaborate more on this?
Regards,
Mohit
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