Hi All,

just in a spot of bother with this gem, I am trying to create a new location and get the above msg.

here is my controller:

class LocationsController < ApplicationController

  # GET /locations

  # GET /locations.json

  def index

    @locations = Location.all

    @json = Location.all.to_gmaps4rails

    end

    respond_to do |format|

      format.html # index.html.erb

      format.json { render json: @locations }

    end

  end

  # GET /locations/1

  # GET /locations/1.json

  def show

    @location = Location.find(params[:id])

    @json = Location.all.to_gmaps4rails

    respond_to do |format|

      format.html # show.html.erb

      format.json { render json: @location }

    end

  end

  # GET /locations/new

  # GET /locations/new.json

  def new

    @location = Location.new

    @json = Location.all.to_gmaps4rails

    respond_to do |format|

      format.html # new.html.erb

      format.json { render json: @location }

    end

  end

  # GET /locations/1/edit

  def edit

    @location = Location.find(params[:id])

    @json = Location.all.to_gmaps4rails

  end

  # POST /locations

  # POST /locations.json

  def create

    @location = Location.new(params[:location])

    @json = Location.all.to_gmaps4rails

    respond_to do |format|

      if @location.save

        format.html { redirect_to @location, notice: 'Location was successfully created.' }

        format.json { render json: @location, status: :created, location: @location }

      else

        format.html { render action: "new" }

        format.json { render json: @location.errors, status: :unprocessable_entity }

      end

    end

  end

  # PUT /locations/1

  # PUT /locations/1.json

  def update

    @location = Location.find(params[:id])

    @json = Location.all.to_gmaps4rails

    respond_to do |format|

      if @location.update_attributes(params[:location])

        format.html { redirect_to @location, notice: 'Location was successfully updated.' }

        format.json { head :no_content }

      else

        format.html { render action: "edit" }

        format.json { render json: @location.errors, status: :unprocessable_entity }

      end

    end

  end

  # DELETE /locations/1

  # DELETE /locations/1.json

  def destroy

    @location = Location.find(params[:id])

    @location.destroy

    @json = Location.all.to_gmaps4rails

    respond_to do |format|

      format.html { redirect_to locations_url }

      format.json { head :no_content }

    end

  end

and the _form I use to create the new location:

<%= form_for(@location) do |f| %>

  <% if @location.errors.any? %>

    <div id="error_explanation">

      <h2><%= pluralize(@location.errors.count, "error") %> prohibited this location from being saved:</h2>

      <ul>

      <% @location.errors.full_messages.each do |msg| %>

        <li><%= msg %></li>

      <% end %>

      </ul>

    </div>

  <% end %>

  <div class="field">

    <%= f.label :id %><br />

    <%= f.number_field :id %>

  </div>

  <div class="field">

    <%= f.label :name %><br />

    <%= f.text_field :name %>

  </div>

  <div class="field">

    <%= f.label :coordinates %><br />

    <%= f.text_field :coordinates %>

  </div>

  <div class="field">

    <%= f.label :course_id %><br />

    <%= f.number_field :course_id %>

  </div>

  <div class="field">

    <%= f.label :college_id %><br />

    <%= f.number_field :college_id %>

  </div>

  <div class="actions">

    <%= f.submit %>

  </div>

<% end %>

 

This is the error msg in full:

NoMethodError in Locations#new

Showing C:/Postgrads0204/app/views/locations/_form.html.erb where line #1 raised:

undefined method `model_name' for NilClass:Class

Extracted source (around line #1):

1: <%= form_for(@location) do |f| %>

2:   <% if @location.errors.any? %>

3:     <div id="error_explanation">

4:       <h2><%= pluralize(@location.errors.count, "error") %> prohibited this location from being saved:</h2>

Trace of template inclusion: app/views/locations/new.html.erb

Rails.root: C:/Postgrads0204

Application Trace | Framework Trace | Full Trace

app/views/locations/_form.html.erb:1:in `_app_views_locations__form_html_erb___82209480_46213008'

app/views/locations/new.html.erb:3:in `_app_views_locations_new_html_erb___810294894_46206828'

Any Ideas where am I going wrong?

Cheers

J