Update request comes even if attributes are unchanged for extension schema attributes

[anurag55]

Custom schema attributes are included in update request params even if there is no change for attributes.

Example request:

Processing by Scim::V2::UsersController#update as HTML
Parameters: {"schemas"=>["urn:ietf:params:scim:api:messages:2.0:PatchOp"], "Operations"=>[{"op"=>"Add", "path"=>"urn:ietf:params:scim:schemas:extension:enterprise:2.0:User:employeeNumber", "value"=>"SCAD1234"}, {"op"=>"Add", "path"=>"urn:ietf:params:scim:schemas:extension:enterprise:2.0:User:department", "value"=>"Vendor / Consultants"}], "id"=>"32"}

So both employeeNumber and Department mapped throgh scim mapping.

def self.scim_attributes_map
  {
    id:         :id,
    userName:   :email,
    employeeNumber: :employee_number,
    department: :department,
    displayName:   :position_title,
  }
end

User Extension class

def self.scim_attributes
  [
    Scimitar::Schema::Attribute.new(name: "employeeNumber", type: "string"),
    Scimitar::Schema::Attribute.new(name: "department",   type: "string"),
  ]
end

So my issue is, it works for the fields available in base schema like displayName, but it doesn't works for fields in extension schema and always triggers an update request even if no changes are made for those attributes.