I am trying to display all the metrics in a table format with an edit option. But, I end up with the below error
In Index view, I am able to see all the data. But when I click on edit link, it is not redirecting to edit view where I have different columns to be showed.
index view:
<%= form_for :metrics_controller, url: metrics_path(#metric), method: :get do |f| %>
<table id="metrics">
<thead>
<tr id="AllMetricColumnNames">
<th id="CommentsColumn">Comments</th>
<th id="EditColumn">Edit</th>
</tr>
</thead>
<% #metricAll.each do |data| %>
<tr id="AllMetricValues">
<td id="Comments"><%= data.Comments %></td>
<td id="EditButton"><%= link_to "Edit", edit_metric_path(#metricAll) %></td>
<% end %>
</tr>
</table>
<% end %>
Controller:
class MetricsController < ApplicationController
def index
#metricAll = Metric.all
end
def show
#metric = Metric.find(params[:id])
end
def edit
#metric = Metric.find(params[:id])
end
private def post_params
params.require(:metric).permit(:Metric, :Comments)
end
end
routes:
root 'metrics#index'
get 'index' => 'metrics#index'
get 'edit' => 'metrics#edit'
resources :metrics
You're passing ALL the metrics for the edit route. Move from
<td id="EditButton"><%= link_to "Edit", edit_metric_path(#metricAll) %></td>
to
<td id="EditButton"><%= link_to "Edit", edit_metric_path(data) %></td>
data is the current metric in your code
According to your screenshot, the error is within the model.
Also, as mentioned by others, you should remove those get routes as the resources :metrics will generate the necessary routes for all your CRUD actions a.ka. for the index, show, edit, new, create, update, destroy.
My guess is that the metric.rb file has a belongs_to :automated_thresholding relationship but the metrics database table is missing the field automated_thresholding_id.
You should create a migration to add that field
add_reference :metrics, :automated_thresholding
Related
I am creating a simple restaurant ordering system with a one to many relationship between a menu and its items. One menu has many items. For the sake of simplicity it is not a many to many.
I am able to create menus fine, but would like to be able to add and show the menu items for that menu in the menus show action.
The menu show action displays okay but when I try to add a new menu item I get the following error:
ActiveRecord::RecordNotFound in ItemsController#create
Couldn't find Menu with 'id'=
raise RecordNotFound, "Couldn't find #{name} with '#{primary_key}'=#{id}"
And here is the queries from the terminal:
Started POST "/items" for ::1 at 2015-01-11 16:09:44 +0000
Processing by ItemsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"***", "item"=>{"name"=>"Test", "price"=>"23", "course"=>"Main", "vegetarian"=>"1", "allergy"=>""}, "commit"=>"Add item"}
Menu Load (0.3ms) SELECT `menus`.* FROM `menus` WHERE `menus`.`id` = NULL LIMIT 1
Completed 404 Not Found in 8ms
EDIT: I followed doon's advice and looked into nested resources and this is indeed a better way of doing it. The updated code is below:
routes.rb
resources :menus do
resources :items
end
menus_controller.rb
def show
#menu = Menu.find(params[:id])
#items = #menu.items
end
items_controller.rb
def create
#menu = Menu.find(params[:menu_id])
#item = #menu.items.create!(item_params)
if #item.save
flash[:success] = "Item added!"
redirect_to #menu
else
flash[:danger] = "Errors found!"
redirect_to #menu
end
end
private
def item_params
params.require(:item).permit(:name, :price, :course, :vegetarian, :allergy, :menu_id)
end
And the Menus
show.html.erb
<%= link_to "<< Back", menus_path, data: { confirm: back_message } %>
<h1><%= #menu.name %> menu</h1>
<center><button id="toggleButton" class="btn btn-sm btn-info">Show/Hide Add Item Form</button></center>
<br>
<div class="row">
<div class="col-xs-offset-3 col-xs-6 toggleDiv hideDiv">
<%= form_for [#menu, Item.new] do |f| %>
<table class="table table-condensed table-no-border">
<tr>
<th scope="row" class="col-xs-2">Name:</th>
<td class="col-xs-10"><%= f.text_field :name %></td>
</tr>
<tr>
<th scope="row">Price:</th>
<td><%= f.text_field :price %></td>
</tr>
<tr>
<th scope="row">Course:</th>
<td><%= f.select(:course, options_for_select([['Starter', 'Starter'], ['Main', 'Main'], ['Dessert', 'Dessert'], ['Drink', 'Drink']]), prompt: "Please select...", class: 'form-control') %></td>
</tr>
<tr>
<th scope="row">Vegetarian:</th>
<td><%= f.check_box :vegetarian %></td>
</tr>
<tr>
<th scope="row">Allergy:</th>
<td><%= f.text_field :allergy %></td>
</tr>
<tr><td colspan="2"><%= f.submit "Add item", class: "btn btn-sm btn-success col-xs-offset-4 col-xs-4" %></td></tr>
</table>
<% end %>
</div>
</div>
<table class="table table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Price</th>
<th>Course</th>
<th>Vegetarian</th>
<th>Allergy</th>
</tr>
</thead>
<tbody>
<% #items.each do |item| %>
<tr>
<td><%= item.name %></td>
<td><%= number_to_currency(item.price, unit: "£") %></td>
<td><%= item.course %></td>
<td><%= item.vegetarian %></td>
<td><%= item.allergy %></td>
</tr>
<% end %>
</tbody>
</table>
What I would probably do in a case like this (especially if your item doesn't exist outside of a menu) is to use Nested Resources:
http://guides.rubyonrails.org/routing.html#nested-resources
http://railscasts.com/episodes/139-nested-resources (a bit dated, but still a decent grounding)
Below are some changes to get you pointed in this direction.
config/routes.rb
resources :menu do
resources :items
end
now our urls will look like
/menu/:menu_id/items/
So we need to adjust the items_controller to get the menu by looking at :menu_id, and we don't need the hidden field anymore. I put it in a before_action as every method in the controller will build through the association.
items_controller.rb
class ItemsController < ApplicationController
before_action :find_menu
...
def create
#item = #menu.items.new(item_params)
if #item.save
redirect_to #menu, notice: 'item added'
else
redirect_to #menu, warning: 'item failed'
end
end
...
private
def find_menu
#menu = Menu.find(params[:menu_id])
end
end
if you want to show it on the menu, we need a new Item to display.
menus_controller.rb
def show
#menu = Menu.find(params[:id])
#item = #menu.items.new
end
Then we need to make use of the nested resource in the menus/show view. By passing in the array of the menu and the item, rails will generate the correct path.
menus/show.html.erb
<%= form_for [#menu,#item] do |f| %>
Are you posting to "/post" or "post/[:id]"?
#menu = Menu.find(params[:id])
Will not find anything if you do not pass it an id. The id can come from the URL params, but this means you should be sending your request to "/post/[:menuid].
You can use the gem https://github.com/charliesome/better_errors to debug your program at the controller level and execute rails console there. just put in "fail" in your controller and then you will have a command line interface where you can inspect your params value and ensure it has the id included and play with the console there.
I have now solved it. Thanks to better_errors I was able to better understand what was going on.
I implemented the show action in menus_controller.rb from aaron.
def show
#item = Item.new
#menu = Menu.includes(:items).find(params[:id])
end
I needed a way to pass the menu id into the menu_id field, so I added a hidden field in the table or show.html.erb passing the current #menu.id into the :menu_id field.
<%= f.hidden_field :menu_id, :value => #menu.id %>
I have read online that passing values through hidden fields is not a great idea though.
Then in the create action of the Items Controller I was able to make a new record as usual redirecting to the existing show view using the menu id from the item object.
def create
#item = Item.new(item_params)
if #item.save
redirect_to menu_path(#item.menu_id)
else
redirect_to menu_path(#menu.menu_id)
end
end
It feels like a bit of a hack so open to suggestions on how to improve.
I am making a resume application to list my employment history, education history and other responsibilities. This is my first rails application on my own without a tutorial, but much of what I do is just following the same actions. All the code is here: https://github.com/victorman/portfolio
Quick summary. I ajaxed my app a bit, and got it to work. But I had a template with the exact same html as part of a view, so I replaced that portion with a render :partial.... The result was twice the html as before. Below is a more detailed description of what I did to the app.
I made two scaffolds, one for Jobs and one for Categories. Jobs has a foreign key to categories.
I made the Jobs view list a link for each category. The jobs#index controller then only finds the rows in the jobs table for that category.
Then I decided to throw some ajax in there so that clicking a link would only reload the relevant data. I added a respond_to at the end of the jobs#index method.
def index
#find which jobs to display based on category_id in the url params
#if no category_id param is given default to 1
unless params.has_key? :category_id
#jobs = Job.find(:all, :conditions => {:category_id => 1})
else
#jobs = Job.find(:all, :conditions => {:category_id => params[:category_id]})
end
respond_to do |format|
format.html
format.js #index.js.erb
end
end
I made a index.js.erb file that retrieves the new data and replaces the old.
var jobs = $("<%= escape_javascript(render(:partial => #jobs))%>").hide();
$("#jobs_table").replaceWith(jobs);
$("#jobs_table").fadeIn();
I added remote: true to the links in the jobs index.html.erb file.
<ul>
<% Category.all.each do |category| %>
<li><%= link_to category.name, { :controller => "jobs", :category_id => "#{category.id}" }, :class => "category_link", remote: true %></li>
<% end %>
</ul>
And I made the template partial where the jobs were displayed. it would never find _jobs.html.erb so i had to name it _job.html.erb
<tbody id="jobs_table">
<% #jobs.each do |job| %>
<tr>
<td><%= job.organization %></td>
<td><%= job.location %></td>
<td><%= job.details %></td>
<td><%= job.start_date %></td>
<td><%= job.end_date %></td>
<td><%= link_to 'Show', job %></td>
<td><%= link_to 'Edit', edit_job_path(job) %></td>
<td><%= link_to 'Destroy', job, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
after all that it worked but I still hadn't DRY'd up the code so I removed the repeated section from index.html.erb which is in _job.html.erb (as shown above) and replaced it with this.
<%= render :partial => #jobs %>
and now it gives me two identical <tbody> tags with id="jobs_table". Why is this giving duplicate data?
You've got a lot to fix...
Create a nested route in your routes.rb:
resources :jobs
resources :categories do
resources :jobs
end
index.html.erb:
<h1>Listing jobs</h1>
<div>
<ul>
<% Category.all.each do |category| %>
<li><%= link_to category.name, category_jobs_path(category),
class: "category_link", remote: true %></li>
<% end %>
</ul>
</div>
<table>
<thead>
<tr>
<th>Organization</th>
<th>Location</th>
<th>Details</th>
<th>Start date</th>
<th>End date</th>
<th></th>
<th></th>
<th></th>
</tr>
</thead>
<tbody id="jobs_table"><%= render partial: #jobs %></tbody>
</table>
<br/>
<%= link_to 'New Job', new_job_path %>
the index of jobs_controller.rb can (should) be refactored to:
class JobsController < ApplicationController
def index
#jobs = Job.where(category_id: params[:category_id] || 1)
respond_to do |format|
format.html
format.js
end
end
end
and the index.js.erb response also should be refactored to:
$("#jobs_table").html("<%= escape_javascript(render partial: #jobs) %>")
$("#jobs_table").fadeIn()
there are some naming issues which should be more pregnant like:
jobs instead of jobs_table
and
category instead of category_link
Also trying to find a Job belonging to Category with 1 is odd. Deal with a different response than a default Category with id 1 (hard coded ids are one of the worst things you can do).
The div around the Categories list is useless (keep your rendered HTML slim and readable).
The problem is due to not understanding when rails manipulates singular vs plural.
Calling render partial: #jobs automagically goes out to the partial _job.html.erb for each element in #jobs. But then the partial goes through each element again because of #jobs.each do |job|.
To fix it, in the render line, replace #jobs with "jobs" and rename _job.html.erb to _jobs.html.erb.
Alternatively, save a step by just replacing #jobs with "job" and keep the template name _job, but this reinforces an incorrect naming scheme.
index.html.erb:
<tbody id="jobs"><%= render partial: "jobs" %></tbody>
index.js.erb:
$("#jobs").html("<%= escape_javascript(render(partial: 'jobs'))%>")
Now it will just search literally for the _jobs template (_jobs.html.erb) and render it once as opposed to going to the singular version of the name and rendering that many times.
I want to print in tabular form the entries given by user. The table will contain 3 columns for name,registration number and classes attended, however the output is not as expected. Its first printing all the names and then all the registration numbers and so on. I want to print a name and the registration number according to name and classes attended.
</head><table width="100%">
<tr>
<th>NAME</th>
<th>REGISTRATION NUMBER</th>
<th>CLASSES ATTENDED</th>
</tr>
<tr>
<% #name_students.each do |t| %>
<th><%= t.name_student %></th><br>
<% end %>
<% #reg_nos.each do |t| %>
<th><%= t.reg_no %></th><br>
<% end %>
<% #classes_ats.each do |t| %>
<th><%= t.classes_at %></th><br>
<% end %>
</tr>
</table>
Here is my controller action.
class PagesController < ApplicationController
def home
#name_students = Page.all
#reg_nos = Page.all
#classes_ats = Page.all
end
def list
#name_students = Page.all
#reg_nos = Page.all
#classes_ats = Page.all
end
def add
Page.create(:name_student => params[:nam])
Page.create(:reg_no => params[:reg])
Page.create(:classes_at => params[:cls])
redirect_to :action => 'home'
end
end
If I understand what you're doing, you should probably have PagesController#home return something like #pages = Page.all object and display the data kind of like this:
<thead>
<tr>
<th>Name</th>
<th>Registration Number</th>
<th>Classes Attended</th>
</tr>
</thead>
<tbody>
<% #pages.each do |p| %>
<tr>
<td><%= p.name %></td>
<td><%= p.registration_number %></td>
<td><%= classes_attended(p.classes_attended) %></td>
</tr>
<% end %>
</tbody>
Above, classes_attended(p) is a call to a helper method that you would use to map the class names of the classes that student attended into an display-able array. Really, that kind of display logic might be better in a decorator, but a helper method should be fine for now.
Let me know if I've totally misunderstood what you're doing, and I'll delete my answer.
Edit to add:
Example index method:
def home
#pages = Page.all
end
Also, looking at your question again, is there a reason you're creating three Page objects with one attribute each instead of one Page object with all three attributes? It should probably look something like Page.create(:name_student => params[:nam], :reg_no => params[:reg], :classes_at => params[:cls]). That's pretty much the only way the solution I posted will work. Again, though, I might be totally misunderstanding what you're going for.
I have a controller models_controller.rb as following:
class ModelsController < ApplicationController
def list
#models=["A","E","M","I"]
end
def get_config
Rails.logger.info(params[:model_id])
//some logic based on params[:model_id] value
end
end
The corresponding list.html.erb is as follows:
<table>
<thead>
<tr>
<th>Model</th>
<th></th>
</tr>
</thead>
<tbody>
<% #models.each_with_index do |model, index| %>
<tr>
<td><%= model %></td>
<td><%= button_to "view", {:controller => :models, :action => :get_config, :model_id => index }, :method => :get %></td>
</tr>
<% end %>
</tbody>
</table>
Each row of this table has a button, where upon clicking, I am passing the index of the element. But I am not been able to access it in the get_config method. Logger is printing an empty string. routes.rb is as follows:
DemoApp::Application.routes.draw do
get "models/list"
get "models/get_config"
get "models/list/:model_id" => "models#get_config"
end
What am I doing wrong? I am not able to figure that out.
Rails routes are matched in the order they are specified. So get "models/get_config" is catching the request before get "models/list/:model_id" => "models#get_config". Try changing the order to this:
DemoApp::Application.routes.draw do
get "models/list"
get "models/list/:model_id" => "models#get_config"
get "models/get_config"
end
I'm trying to edit multiple records using one form, so the user can edit a few records then press submit at the end rather than after each individual one. I've posted my current code, and I get this error:
undefined method `connection_connection_path'
Controller
def show
#customer = Customer.find(params[:id])
#connection = #customer.connections
respond_to do |format|
format.html # show.html.erb
format.json { render json: #customer }
end
end
View
<table class="table">
<thead>
<th>Interface</th>
<th>Device</th>
<th>Speed</th>
<th>Site</th>
<th>Capable</th>
<th>Notes</th>
</thead>
<%= form_for(#connection) do |f| %>
<% #connection.each do |l| %>
<tr>
<td><%= l.interface %></td>
<td><%= l.device %></td>
<td><%= l.speed %></td>
<td><%= l.site.name%> </td>
<td><%= f.check_box :check %></td>
<td><%= f.text_field :notes %></td>
</tr>
<% end %>
<tr><%= f.submit %></tr>
</table>
<% end %>
routes
resources :connections
resources :sites
resources :customer_sites
resources :customers
root :to => "customers#index"
so where is your submit button?? and it should not done in show, maybe you might create a new method in your controller and do the multiple edit function.
The basic concept is when you have checks, you need to pass an array of your object to your method, and update them one by one. or you can do that using JS as well.
refer this railscast
http://railscasts.com/episodes/165-edit-multiple
and this stackoverflow
Rails 3 Edit Multiple Records in a Single Form
these resources you can get easily by google :D
if still have problem, just come and ask here again