Customizing your new and edit pages
You can customize the
#new form by defining
#form_schema in your admin controller. Let’s make it blank.
class Admin::ReceiptsController < AdminController private def model Product end def form_schema Super::Form.new do |f, type| end end end
Once you save and reload that page, you should see a submit button with no form fields.
f variable is similar to a Hash where the key is the column name and the value is the rule we use to turn it into a human readable value.
With that in mind, let’s manually make it look like it used to.
def form_schema Super::Form.new do |f, type| f[:customer_id] = type.text_field f[:price_cents] = type.text_field end end
But this isn’t very pleasant to use. It’s hard to know what number to type in for the customer ID, so let’s make that a dropdown.
def form_schema Super::Form.new do |f, type| customers = Customer.all.map do |c| [c.id, c.name] end f[:customer_id] = type.select(customers) f[:price_cents] = type.text_field end end
Let’s say for some reason, we only want to let admins set the
price_cents value when creating a record, but not when editing. We can use the
#current_action method that’s already defined in the admin controller.
def form_schema Super::Form.new do |f, type| f[:customer_id] = type.text_field f[:price_cents] = type.text_field(disabled: current_action.edit?) end end
This shows the
price_cents column while preventing it from being edited. You can also hide it altogether by setting
f[:price_cents] only on the
def form_schema Super::Form.new do |f, type| f[:customer_id] = type.text_field if current_action.new? f[:price_cents] = type.text_field end end end
Customizing strong parameters
You shouldn’t have to customize this behavior at all. Super can figure out strong parameters by allowing all of the form fields that are specified as the key
f[$this_part]; this also works in conjunction with nested attributes.
Forms with nested attributes
Using unsupported form fields
Supported form types
#directfor calling unsupported form builder methods
- Nested attributes