CODEWITHSUNDEEP
pythondjango
Milo Persic
Milo Persic

Reputation: 1118

Can I pass a variable in for a related model in getattr()?

So this works:

field_name = 'msrp'

price = getattr(mymodel.related_model, field_name)

But I'd like to pass in a variable for the 'related_model', something like:

field_name = 'msrp'
x = related_model_name

price = getattr(mymodel.x, field_name)

Clearly that does not work, but it shows what I'd like to accomplish. Is there a way to pass in a variable as the placeholder for the related model name in some manner?

Upvotes: 1

Views: 80

Answers (1)

willeM_ Van Onsem
willeM_ Van Onsem

Reputation: 476659

The price = getattr(mymodel.related_model, 'msrp') makes not much sense, since this is imply equivalent to price = mymodel.related_model.msrp. If the name of the related_model is stored in a variable, you can however use getattr(…) [python-doc] to obtain the related model object:

x = related_model_name

price = getattr(mymodel, x).msrp

or if both are strings, you can use getattr twice:

x = related_model_name
msrp = field_name

price = getattr(getattr(mymodel, x), msrp)

Upvotes: 1

Related Questions