when sanitize changes initial input, value is modified twice in a single render

[bgentry]

I took the demo gist, updated it to use the release channel of ember, and changed the sanitizeInput function to just always return a fixed value (thus always changing the initial value to something else):

https://ember-twiddle.com/21941c09a4bb7ac7e8c03f174208806b?openFiles=components.one-way-input.js%2C

Because sanitizeInput is called on load (see #135), that causes the following error when the app first renders:

Assertion Failed: You modified currentValue twice on (generated application controller) in a single render. This was unreliable and slow in Ember 1.x and is no longer supported. See emberjs/ember.js#13948 for more details.

My understanding of Ember isn't strong enough to know how to fix this, though 😞

[ghost]

Fixed by removing the action all together. Sanitize your inputs in the update action instead!