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Editorial Team
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Asked: 2026-06-09T01:22:17+00:00

I constructed an object based on parameters and passed it into the update_attributes method,

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I constructed an object based on parameters and passed it into the update_attributes method, within my controller’s update method. The object had one attribute (xyz) that was not listed as part of attr_accessible list in the model. Rails skipped updating the attribute in question and generated a warning that mass-assignment of attribute xyz failed.

I would like to make sure that update_attributes fails if this kind of situation occurs instead of just getting a warning. Is there a config setting or an option that can be passed in to the update_attributes call to make this happen?

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  1. Editorial Team

    You can change the config to use a sanitizer that will raise an exception:

    config.active_record.mass_assignment_sanitizer = :strict

    Edit: This is available since 3.2. Your question is tagged with rails 3.1, so it won’t work. You can upgrade to 3.2, or take a look at this SO question on how to patch the sanitizer.

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