Simple_form with Form Object missing Mapping - ruby-on-rails

Question

I am using simple_form_for
<%= simple_form_for( #form_object, url: wizard_path, :method => :put) do |f| %>
<%= f.input :website %>
<%= f.submit %>
</div>
<% end %>
However, I am also using a Form Object
class Base
include ActiveModel::Model
# Validations
# Delegations
# Initializer
end
My issue is that my inputs are not mapping to my database columns, so https://github.com/plataformatec/simple_form#available-input-types-and-defaults-for-each-column-type
None of these show up ,and can I create custom mappings.
How can I allow Simple_form to see my column types and work correctly?
If I check the class of my delegated fields, they seem to show as :string or :integer, etc.

Answer 1

simple_form uses 2 methods to determine the input type field mapping from a standard model (type_for_attribute and has_attribute?). Source
Since you are wrapping the model in another layer but still want the inference that simple_form provides you just need to delegate these calls to the original model via
class Wrapper
include ActiveModel::Model
attr_reader :model
delegate :type_for_attribute, :has_attribute?, to: :model
def initialize(model)
#model = model
end
end
However if you were not wrapping the model you would need to define these methods yourself such as (using the new rails 5.2 Attribute API)
class NonWrapper
include ActiveModel::Model
include ActiveModel::Attributes
attribute :name, :string
def type_for_attribute(name)
self.class.attribute_types[name]
end
def has_attribute?(name)
attributes.key?(name.to_s)
end
end
Example
a = NonWrapper.new(name: 'engineersmnky')
a.has_attribute?(:name)
#=> true
a.type_for_attribute(:name)
#=> => #<ActiveModel::Type::Value:0x00007fffcdeda790 #precision=nil, #scale=nil, #limit=nil>
Note other additions may be required for a form object like this to work with simple_form. This answer simply explains how to handle the input mapping inference