Preventing AR from writing a certain field?

rubyonrails-talk
1

One of my models have a field that should be maintained exclusively by triggers.

I could always create a view that masks this column from updates, but if there's a decent way to accomplish this with just AR, I'd rather go for that.

Suggestions appreciated, Isak

2

From Rails API Docs:

attr_protected(*attributes) Attributes named in this macro are protected from mass-assignment, such as new(attributes) and attributes=(attributes). Their assignment will simply be ignored. Instead, you can use the direct writer methods to do assignment. This is meant to protect sensitive attributes from being overwritten by URL/form hackers.

class Customer < ActiveRecord::Base     attr_protected :credit_rating end

by setting this for an attribute (column), you always have to explicitly change it like

@something.attribute = "bla" or with your toggle. @something = @something.toggle(:attribute)

3

Thinking about it, I decided to put this in the db layer. Best way to guarantee integrity, no matter what happens to this app in the future.

Isak