id,summary,reporter,owner,description,type,status,component,version,severity,resolution,keywords,cc,stage,has_patch,needs_docs,needs_tests,needs_better_patch,easy,ui_ux 13372,Field instance copying failes before contribute_to_class,paluh,nobody,"Python copy.copy() called on Field instance which is not contributed to class (before contribute_to_class call) raises: {{{ AttributeError: 'SomeField' object has no attribute 'model' }}} This issue is related to #12977 changeset. It has added db.models.Field.!__setstate!__ method which expects that Field instance has 'model' attribute (but it is initialised in contribute_to_class method). I think that copying of instance should be safe all the time and this problem can be easily fixed by 'hasattr' check. Should I provide patch with test? ",,closed,Uncategorized,dev,,duplicate,,,Unreviewed,0,0,0,0,0,0