undefined method `i18n_key' for Address:Class - ruby-on-rails

Question

I get this error when I load a page that contains a form (like edit.html.erb or new.html.erb). It freezes on the labels. I need to underline that I am not using ActiveRecord as an ORM in my app but Perpeuity gem which is an implementation of the Datamapper pattern. Leaving Activerecord behind has proved a bit problematic so maybe someone will be able to help.
The form partial:
<%= form_for(#address) do |f| %>
<% if #address.errors.to_a.any? %>
<div id="error_explanation">
<h2><%= pluralize(#address.errors.count, "error") %> prohibited this address from being saved:</h2>
<ul>
<% #address.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="row collapse">
<div class="small-3 columns">
<% require 'debugger'; debugger %>
<%= f.label :line1, class: "right inline" %>
</div>
<div class="small-7 columns left">
<%= f.text_field :line1 %>
</div>
</div>
<div class="row collapse">
<div class="small-3 columns">
<%= f.label :line2, class: "right inline" %>
</div>
<div class="small-7 columns left">
<%= f.text_field :line2, :placeholder => "(optional)" %>
</div>
</div>
<div class="row collapse">
<div class="small-3 columns">
<%= f.label :postcode, class: "right inline" %>
</div>
<div class="small-7 columns left">
<%= f.select :postcode, Address::POSTCODES, :prompt => 'Select a postcode (optional)' %>
</div>
</div>
<div class="row collapse">
<div class="small-3 columns">
<%= f.label :city, class: "right inline" %>
</div>
<div class="small-7 columns left">
<%= f.text_field :city %>
</div>
</div>
<div class="row collapse">
<div class="small-3 columns">
<%= f.label :county, class: "right inline" %>
</div>
<div class="small-7 columns left">
<%= f.select :postcode, Address::COUNTIES, :prompt => 'Select a county (optional)' %>
</div>
</div>
<div class="row collapse">
<div class="small-9 small-offset-3 columns">
<%= f.submit %>
</div>
</div>
The model:
class Address
extend ActiveModel::Naming
extend ActiveModel::Translation
include Perpetuity::RailsModel
def errors
#errors ||= ActiveModel::Errors.new(self)
end
def read_attribute_for_validation(attr)
send(attr)
end
def save
validate!
errors.empty? ? super : false
end
def validate!
#place custom validations here e.g.
errors.add(:name, "cannot be blank.") if self.name = ""
errors.add(:number,"must be less than 7.") if self.number >= 7
end
attr_accessor :name, :city, :county, :line1, :line2, :postcode
attr_reader :errors
end
The controller with relevant methods:
class AddressesController < ApplicationController
def new
#address = Address.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #address }
end
end
def edit
#require 'debugger'; debugger
#address = Perpetuity[Address].find(params[:id])
end
def create
#address = Address.new(params[:address])
Perpetuity[Address].insert #address
respond_to do |format|
if #address.save
format.html { redirect_to #address, notice: 'Address was successfully created.' }
format.json { render json: #address, status: :created, location: #address }
else
format.html { render action: "new" }
format.json { render json: #address.errors, status: :unprocessable_entity }
end
end
end
def update
#address = Perpetuity[Address].find(params[:id])
respond_to do |format|
if #address.update_attributes(params[:address])
format.html { redirect_to #address, notice: 'Address was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: #address.errors, status: :unprocessable_entity }
end
end
end
end
I am using Rails 3.2 and ActiveModel gem installed has version 3.2.13. I had a look at the gem code and cannot find method i18n_key in it, while this documentation here [link]http://www.rubydoc.info/docs/rails/3.1.1/ActiveModel/Name:i18n_key indicates that it should be in there (similarly it is in 3.2.8 docs). Is it a bug or am I doing something wwrong? Thank your for your help.

Answer 1

I was getting this error and it turned out that I was using what appeared to be a reserved keyword in one of my classes. In my case it was model_name
Renaming it solved the issue for me.