Rails check_box: checked if for a new record?

Question

In a Rails 4 form_for form, I'm have:

f.check_box :visible

I want the checkbox to be rendered as checked when rendering the form for a brand new (ie unsaved) object.

When the object is saved, I want the checkbox to behave normally (ie be checked or not checked based on the value of the saved object).

This works:

f.object.new_record? ? (f.check_box :visible, :checked => true) : (f.check_box :visible)

.. but it's pretty long! Is there a simpler/better way I can accomplish this?

smathy · Accepted Answer · 2016-02-01 19:09:00Z

2

f.check_box :visible, checked: ( f.object.new_record? || f.object.visible )

answered Feb 1, 2016 at 19:09

smathy

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Comments

Meier · Accepted Answer · 2016-02-01 19:46:58Z

0

Just set the attribute to true when you create your new object in the controller:

def new
   @model = Model.new(visible: true)
end

answered Feb 1, 2016 at 19:46

Meier

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