Created
February 25, 2013 23:31
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Initially built with scaffold, edit and show links were working.
After working extensively on index (ajaz, paging, sorting, search fielkds, partials), I have discovered they are no longer working! For example the show.html.erb gives me: undefined method `name' for nil:NilClass when executing <%= @game_class.name % However, the show method is def…
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<%= hidden_field_tag :direction, params[:direction] %> | |
<%= hidden_field_tag :sort, params[:sort] %> | |
<table class="pretty"> | |
<thead> | |
<tr> | |
<th><%= sortable "name" %></th> | |
<th>Description</th> | |
<th><%= sortable "game_id" %></th> | |
<th></th> | |
<th></th> | |
<th></th> | |
</tr> | |
</thead> | |
<% for game_class in @game_classes %> | |
<tr> | |
<td><%= game_class.name %></td> | |
<td><%= game_class.description %></td> | |
<td><%= game_class.game_id %></td> | |
<td><%= link_to 'Show', game_class %></td> | |
<td><%= link_to 'Edit', edit_game_class_path(game_class) %></td> | |
<td><%= link_to 'Destroy', game_class, method: :delete, data: { confirm: 'Are you sure?' } %></td> | |
</tr> | |
<% end %> | |
</table> | |
<div id="paginator"> | |
<%= paginate @game_classes %> | |
</div> |
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class GameClassesController < ApplicationController | |
# GET /game_classes | |
# GET /game_classes.json | |
# added to allow controller to generate parameters if not present. railscast 228 | |
helper_method :sort_column, :sort_direction | |
def index | |
@game_classes = GameClass.search(params[:search]).order(sort_column + ' ' + sort_direction).page(params[:page]).per(5) | |
respond_to do |format| | |
format.html # index.html.erb | |
format.json { render json: @game_classes } | |
format.js # index.js.erb | |
end | |
end | |
# Methods to set sort peramiters securely (checking whats in the query string) | |
private | |
def sort_column | |
GameClass.column_names.include?(params[:sort]) ? params[:sort] : "name" | |
end | |
def sort_direction | |
%w[asc desc].include?(params[:direction]) ? params[:direction] : "asc" | |
end | |
# GET /game_classes/1 | |
# GET /game_classes/1.json | |
def show | |
@game_class = GameClass.find(params[:id]) | |
respond_to do |format| | |
format.html # show.html.erb | |
format.json { render json: @game_class } | |
end | |
end | |
# GET /game_classes/new | |
# GET /game_classes/new.json | |
def new | |
@game_class = GameClass.new | |
respond_to do |format| | |
format.html # new.html.erb | |
format.json { render json: @game_class } | |
end | |
end | |
# GET /game_classes/1/edit | |
def edit | |
@game_class = GameClass.find(params[:id]) | |
end | |
# POST /game_classes | |
# POST /game_classes.json | |
def create | |
@game_class = GameClass.new(params[:game_class]) | |
respond_to do |format| | |
if @game_class.save | |
format.html { redirect_to @game_class, notice: 'Game class was successfully created.' } | |
format.json { render json: @game_class, status: :created, location: @game_class } | |
else | |
format.html { render action: "new" } | |
format.json { render json: @game_class.errors, status: :unprocessable_entity } | |
end | |
end | |
end | |
# PUT /game_classes/1 | |
# PUT /game_classes/1.json | |
def update | |
@game_class = GameClass.find(params[:id]) | |
respond_to do |format| | |
if @game_class.update_attributes(params[:game_class]) | |
format.html { redirect_to @game_class, notice: 'Game class was successfully updated.' } | |
format.json { head :no_content } | |
else | |
format.html { render action: "edit" } | |
format.json { render json: @game_class.errors, status: :unprocessable_entity } | |
end | |
end | |
end | |
# DELETE /game_classes/1 | |
# DELETE /game_classes/1.json | |
def destroy | |
@game_class = GameClass.find(params[:id]) | |
@game_class.destroy | |
respond_to do |format| | |
format.html { redirect_to game_classes_url } | |
format.json { head :no_content } | |
end | |
end | |
end |
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<h1>Listing game_classes</h1> | |
<%= form_tag game_classes_path, :method => 'get', :id => "game_classes_search" do %> | |
<p> | |
<%= text_field_tag :search, params[:search] %> | |
<%= submit_tag "Search", :name => nil %> | |
</p> | |
<div id="game_classes"><%= render 'game_class' %></div> | |
<%-end %> | |
<p><%= link_to "New Class", new_game_class_path %></p> |
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<p id="notice"><%= notice %></p> | |
<p> | |
<b>Name:</b> | |
<%= @game_class.name %> | |
</p> | |
<p> | |
<b>Description:</b> | |
<%= @game_class.description %> | |
</p> | |
<%= link_to 'Edit', edit_game_class_path(@game_class) %> | | |
<%= link_to 'Back', game_classes_path %> |
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An example error url: http://localhost:3000/game_classes/13
Error: undefined method `name' for nil:NilClass
code generating the error:
4: Name:
5: <%= @game_class.name %>
Parameters:
{"id"=>"13"}