django: get model instance with dynamic variable name and value

Question

I have the following error: Cannot resolve keyword 'attrName1' into field. Choices are: codesectrepmodel, configCons, id. My code:

modelName1="ConfigConsModel"
model1 = get_model('actsInformationRetrieval', modelName1)
print "model attr", model1._meta.get_all_field_names() #displays ['codesectrepmodel', 'configCons', 'id']
print "attrName1", attrName1 #displays configCons
print "attr1", attr1 #displays ECOFIN
attr1Instance=model1.objects.get(attrName1=attr1)

What's wrong? I think the problem is that get_model returns the model class, not an object. Right?

Andrii Zarubin · Accepted Answer · 2013-07-25 13:23:20Z

5

When you are doing

.get(attrName1=attr1)

the attrName1 is actually keyword argument but not the variable. If you want to name fields dynamically you can try

.get(**{attrName1: attr1})

answered Jul 25, 2013 at 13:23

Andrii Zarubin

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2 Comments

Andrii Zarubin Over a year ago

well, I meant to replace attr1Instance=model1.objects.get(attrName1=attr1) with attr1Instance=model1.objects.get(**{attrName1: attr1})

Andrii Zarubin Over a year ago

well, this is just a standard syntax for passing keyword arguments as a dictionary in python docs.python.org/2/tutorial/controlflow.html#keyword-arguments

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