Rails: how do attributes become protected (without any invocation of attr_protected or attr_accessible)?

I'm getting the "WARNING: Can't m开发者_如何学编程ass-assign protected attributes: type", but I don't have any calls to attr_accessible or attr_protected in my code.

Is there anything else that might cause an attribute to become protected?

I'm not so keen on adding all attributes to an attr_accessiblestatement, because that becomes just one more thing to maintain.

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The type attribute is reserved for internal use for single table inheritance.

You should be able to use type by setting the set_inheritance_column

set_inheritance_column :kind # change to something other than :type.

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Check out: Rails attr_accessible does not work for :type?

:type is your problem.