fix(generic): use copy instead of working with the original field #1357
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If we create
fake_field
by simply usinggetattr
on theannotations.items()
we actually get the original field and then changeits name in the next line. But thats not what we want, because that
changes the field for the model it belongs to. We only want a temporary
field, so we can add it to the
extra_columns
.Closes: #1346