Maybe this is a newbie issue but I just can't figure out was going on
Getting an error when I refresh local host
undefined local variable or method `boards' for #<#:0x3c8eff8>
Extracted source (around line #14):
Here is the code in my index.html.erb for boards
Listing boards
<table>
<thead>
<tr>
<th>Name</th>
<th>About</th>
<th>User</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<%= will_paginate(boards) %>
<% #boards.each do |board| %>
<tr>
<td><%= board.name %></td>
<td><%= board.about %></td>
<td><%= board.user.full_name %></td>
<td><%= link_to 'Show', board %></td>
<td><%= link_to 'Edit', edit_board_path(board) %></td>
<td><%= link_to 'Destroy', board, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
</table>
<br>
<%= link_to 'New Board', new_board_path %>
****Here is the code for my index method in board controller****
def index
if user_signed_in?
#boards = current_user.boards
else
#boards = Board.paginate(page: params[:page], per_page: 1)
end
end
I have added the will_paginate to my gem file
source 'https://rubygems.org'
gem 'will_paginate'
Related
I'm having some trouble with check_box_tag and my method enable (a product can be disabled) in Ruby on Rails.
I created some checkbox so the user select the products that he wants to set enable = true.
Keeps returning the error "Couldn't find Product with 'id'=enable"
My method enable:
def enable
Product.update_all(["enable=?", true], :id => params[:selected_products])
redirect_to root_url
end
My routes.rb:
Rails.application.routes.draw do
get 'product_export/new'
get 'product_imports/new'
resources :users
resources :product_imports
resources :products do
collection do
post :import
post :export
post :enable
end
end
root to: 'products#index'
end
and finally my view with the table e the check_box_tag:
<%= form_tag enable_products_path, :method => :put do %>
<%= submit_tag "Enable products" %>
<table class="table table-striped table-responsive" id="productsTable">
<thead class="thead-inverse">
<tr>
<th/>
<th>Code</th>
<th>Enable</th>
<th>Bar code</th>
<th>Unit cost</th>
<th>Description</th>
<th>Family</th>
<th>Final</th>
<th>Measure</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% #products.each do |product| %>
<tr>
<td><%= check_box_tag 'selected_products[]', product.id %></td>
<td><%= link_to (product.code), edit_product_path(product) %></td>
<td><%= product.enable %></td>
<td><%= product.bar_code %></td>
<td><%= product.unit_cost %></td>
<td><%= product.description %></td>
<td><%= product.family %></td>
<td><%= product.final %></td>
<td><%= product.measure %></td>
<td><%= link_to 'Destroy', product, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
</table>
<% end %>
Thanks for the help!
Use where to find selected products and when to update them:
Product.where(id: params[:selected_products]).update_all(enable: true)
I want to create a table named groups that lists of each group. Inside of each group, I want to list the groups courses. The group has_many :courses, and the course belongs_to :group. My current attempt does not work, and I have no idea where to go from there
Current Attempt
courses_controller.rb
def index
#courses = Course.find_by(group: :group_id)
#groups = Group.all
end
index.html.erb
<table>
<thead>
<tr>
<th>Title</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% #groups.each do |group| %>
<tr>
<td><%= group.title %></td>
<td><%= link_to 'Show', group %></td>
<td><%= link_to 'Edit', edit_group_path(group) %></td>
<td><%= link_to 'Destroy', group, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<tr>
<td>
<table>
<thead>
<tr>
<th>Title</th>
</tr>
</thead>
<tbody>
<% #courses.each do |course| %>
<tr>
<% if Lesson.exists?(user: current_user, course: course) %>
<td><%= link_to course.title, edit_lesson_path(Lesson.find_by(user: current_user, course: course)) %></td>
<% else %>
<td><%= link_to course.title, new_course_lesson_path(course) %></td>
<% end %>
<% if current_user.master? %>
<td><%= link_to 'Edit', edit_course_path(course) %></td>
<td><%= link_to 'Destroy', course, method: :delete, data: { confirm: 'Are you sure?' } %></td>
<% else %>
<% end %>
</tr>
<% end %>
</tbody>
</table>
<br>
<% if current_user.master? %>
<%= link_to 'New Course', new_course_path %>
<% end %></td>
</tr>
<% end %>
</tbody>
</table>
Any help is appreciated :)
UPDATE
:group_id is the groups id for each created course, since the group has_many :courses The lesson belongs_to :course but that isnt important, as I just want the table, Thanks XP
As I said in my comment, what do you mean it isn't working? Are you getting any error messages? How have you structured you models? Have you created a migration to add group id to courses? What does your routes file look like - are courses nested under groups? If you don't provide this kind of information, its difficult to provide help.
If you look in the logs, you'll get some messages which will direct you to where things are going wrong. Have you tried running
Course.find_by(group: :group_id)
in a rails console. I suspect you'll find that this line is causing problems. Comment out this line and amend your erb as follows (I've not included all the code, but just to give you an idea). Also its not a good idea to use tables within tables.
<table>
<thead>
<tr>
<th>Title</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% #groups.each do |group| %>
<tr>
<td><%= group.title %></td>
</tr>
<tr>
<td>
<table>
<thead>
<tr>
<th>Title</th>
</tr>
</thead>
<tbody>
<% #group.courses.each do |course| %>
<tr>
<% if Lesson.exists?(user: current_user, course: course) %>
<td><%= link_to course.title, edit_lesson_path(Lesson.find_by(user: current_user, course: course)) %></td>
<% else %>
<td><%= link_to course.title, new_course_lesson_path(course) %></td>
<% end %>
I am using cancan to authorize the user in controller,And in views i am using Can?to check if the user is authorize to see that function
index.html.erb
<p id="notice"><%= notice %></p>
<h1>Listing Noticeboards</h1>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>society</th>
<th>Notice heading</th>
<th>Notice text</th>
<th>Active</th>
<th>Isdelete</th>
<th>Expire</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% #noticeboards = #noticeboards.where(Isdelete: 0).find_each %>
<% #noticeboards.each do |noticeboard| %>
<tr>
<td><%= Society.find_by(id: noticeboard.id_society, Isdelete: 0).name %></td>
<td><%= noticeboard.notice_heading %></td>
<td><%= noticeboard.notice_text %></td>
<td><%= noticeboard.active %></td>
<td><%= noticeboard.IsDelete %></td>
<td><%= noticeboard.Expire %></td>
<td><%= link_to 'Show', noticeboard %></td>
<% if can? :update, noticeboard %>
<td><%= link_to 'Edit', edit_noticeboard_path(noticeboard) %> <% end %></td>
<% if can? :delete , noticeboard %>
<td>
<%= link_to 'Destroy', noticeboard, method: :delete, data: { confirm: 'Are you sure?' } %></td> <% end %>
</tr>
<% end %>
</tbody>
</table>
<br>
<% if can? :create, #noticeboard %>
<%= link_to 'New Noticeboard', new_noticeboard_path %>
<% end %>
In this if i change :delete to anything else, say :Hello, its still checking can, and if i am not using anything, it gives error saying "wrong number of arguments" what is the error, why its not taking :delete function?
I'm new to ROR and I'm trying to implement a simple search which should allow a user to search for hikes that match a certain range of difficulty. The form is properly displayed and I do not get any error messages, the problem is that no search results are dispayed.
I've been trying to solve this for a whole day now, so any help is extremely appreciated!
Index.html.erb
<%= form_tag wanderungens_path, :method => 'get' do %>
<p>
<%= number_field_tag ':search[dauer_von]', #search.dauer_von %>
<%= number_field_tag ':search[dauer_bis]', #search.dauer_bis %>
<%= submit_tag "Search", :name => nil %>
</p>
<% end %>
Wanderungens_controller.rb
def index
#search = WanderungenSearch.new(params[:search])
#wanderungens = #search.scope
end
wanderungen_search.rb
class WanderungenSearch
attr_reader :dauer_von, :dauer_bis
def initialize(params)
params ||= {}
#dauer_von = params[:dauer_von]
#dauer_bis = params[:dauer_bis]
end
def scope
Wanderungen.where('zeitdauer BETWEEN ? AND ?', #dauer_von, #dauer_bis)
end
I followed this tutorial: https://www.youtube.com/watch?v=Ri1YNjl1_hA
I'm on Rails 4.0.0 and Ruby 2.0.0
Update: This is the code where #Wanderungens is displayed:
<table>
<thead>
<tr>
<th>Description</th>
<th>User</th>
<th>Schwierigkeitsgrad</th>
<th>Zeitdauer</th>
<th></th>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<% #wanderungens.each do |wanderungen| %>
<tr>
<td><%= wanderungen.description %></td>
<td><%= wanderungen.user.email if wanderungen.user %></td>
<td><%= wanderungen.schwierigkeitsgrad.description if wanderungen.schwierigkeitsgrad %></td>
<td><%= wanderungen.zeitdauer if wanderungen.zeitdauer %></td>
<td><%= link_to 'Show', wanderungen %></td>
<td><%= link_to 'Edit', edit_wanderungen_path(wanderungen) %></td>
<td><%= link_to 'Destroy', wanderungen, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
</table>
If I search from 1 to 2, the following request is generated:
http://localhost:3000/wanderungens?utf8=%E2%9C%93&%3Asearch[dauer_von]=1&%3Asearch[dauer_bis]=2
This will be my last question for today (sorry if I'm asking too fast)
I'm getting the error undefined method 'map' for nil:NilClass
It says the problem is on this line: <td><%= image_tag #map.map.url %></td>
The whole index code is below:
<h1>Listing maps</h1>
<table>
<tr>
<th>Carname</th>
<th>Map</th>
<th>Criticalcomponentlocations</th>
<th>Warnings</th>
<th>Additionalinfo</th>
<th></th>
<th></th>
<th></th>
</tr>
<% #maps.each do |map| %>
<tr>
<td><%= map.carname %></td>
<td><%= image_tag #map.map.url %></td>
<td><%= map.criticalcomponentlocations %></td>
<td><%= map.warnings %></td>
<td><%= map.additionalinfo %></td>
<td><%= link_to 'Show', map %></td>
<td><%= link_to 'Edit', edit_map_path(map) %></td>
<td><%= link_to 'Destroy', map, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</table>
<br />
<%= link_to 'New Map', new_map_path %>
Maps Controller, Index:
def index
#maps = Map.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: #maps }
end
end
In your #maps.each loop, you're trying to access a (probably) non-existent #map instance variable when you should be accessing the map variable that is local to your loop.
Try this instead:
<% #maps.each do |map| %>
<tr>
...
<td><%= image_tag map.map.url %></td>
...
</tr>
<% end %>
The variable you wish to use, map, is not an instance variable. It is a local variable, so you should use 'map.url' instead of '#map.map.url'
Your line of code <td><%= image_tag #map.map.url %></td> uses an instance variable #map, but you're inside the scope of the enumerator <% #maps.each do |map| %>. You should use the map.url local variable instead of #map.map.url.