rails 3 with a ajax created form - ruby-on-rails-3

I want to create a page which user can modify data on that page.
So I tried to use a ajax call to replace the original data table row into a form.
The new form could be created and replace the row by my code currently. But after edited data in that form and click 'Update', nothing happened. In my console shows something like:
ActionController::RoutingError (No route matches "/projects/5"):
I can't figure out why it didn't work.
Codes are shown as following:
index.html.erb
<tr>
<th>Name</th>
<th></th>
<th></th>
</tr>
<% #projects.each do |project| %>
<tr id="project_<%= project.id %>">
<td><%= link_to project.name, project %></td>
<td><%= link_to 'Edit', edit_project_path(project), :method => :get, :remote => true %></td>
<td><%= link_to 'Destroy', project, :confirm => 'Are you sure?', :method => :delete , :remote => true %></td>
</tr>
<% end %>
edit.js.erb
$('#project_<%= #project.id%>').replaceWith("<%= escape_javascript(render :partial=>'edit') %>");
_edit.html.erb
<tr id="project_<%= #project.id%>">
<%= form_for(#project, :remote => true) do |f| %>
<%= form_authenticity_token %>
<td><%= f.text_field :name %></td>
<td><%= f.submit 'Update' %></td>
<td><%= link_to 'Destroy', #project, :confirm => 'Are you sure?', :method => :delete , :remote => true %></td>
<% end %>
</tr>

Routing errors are usually caused by one of the following:
you don't have the route specified in routes.rb. Run "rake routes" at the command line and see if something like "/projects/:id" shows up. If not you have to add the route by adding a projects resource or otherwise specifying the route manually. Make sure the HTTP method matches the HTTP verb specified in routes.rb.
you have no controller named named ProjectsController or no create method (if your ajax method is posting) or no update method (if its putting).

Related

Grouping records with headings in Rails 3

I have an articles model in my Rails 3 application. The article model has a column called categories which is set using a select box in the new form view. (It's a select box because the options should never change and there are only four of them).
The index view code I have is as follows:
<% #articles.category.each do |article| %>
<%= article.category %>
<% #articles.each do |article| %>
<tr>
<td><%= article.title %></td>
<td><%= article.author %></td>
<td><%= article.category %></td>
<td><%= link_to 'Show', article %></td>
<td><%= link_to 'Destroy', article, confirm: 'Are you sure?', method: :delete %></td>
</tr>
<% end %>
<% end %>
I have grouped by category in my controller:
#articles = Article.group(:category).order('title ASC')
However, this results in an exception which points to the following line <% #articles.category.each do |article| %>.
What is the tidiest (from within my view code) way of achieving the following:
Category 1
Article 1
Article 2
Category 2
Article 5
Category 3
Article 8
So each article is listed under it's category.
I'd suggest you to use group_by method (Documentation):
# in your controller
articles = Article.order('title ASC')
#grouped_articles = articles.group_by &:category
# in your view
<% #grouped_articles.each do |category, articles| %>
<%= category %>
<% articles.each do |a| %>
<tr>
<td><%= a.title %></td>
<td><%= a.author %></td>
<td><%= link_to 'Show', a %></td>
<td><%= link_to 'Destroy', a, confirm: 'Are you sure?', method: :delete %> </td>
</tr>
<% end %>
<% end %>

Rails 3.2.x Undefined Method 'join'

I have a basketball app with a many-to-many relationship where a Coach could have coached multiple teams, and a team can have many Coaches.
Coaches_Controller.rb
def index
#coaches = Coach.joins(:teams).select("coaches.first_name, coaches.last_name, teams.team_level")
respond_to do |format|
format.html # index.html.erb
format.json { render json: #coaches }
end
end
Index.html.erb
<% #coaches.each do |coach| %>
<tr>
<td><%= link_to coach.first_name, coach_path(coach) %></td>
<td><%= coach.last_name %></td>
<td><%= coach.team_level %></td>
<td>
<%= link_to t('.edit', :default => t("helpers.links.edit")),
edit_coach_path(coach), :class => 'btn btn-mini' %>
<%= link_to t('.destroy', :default => t("helpers.links.destroy")),
coach_path(coach),
:method => :delete,
:confirm => t('.confirm', :default => t("helpers.links.confirm", :default => 'Are you sure?')),
:class => 'btn btn-mini btn-danger' %>
</td>
</tr>
<% end %>
I am getting this error, and I'm not quite sure why...
http://i.stack.imgur.com/5a6oB.png
Ideas? I feel like it is something small I'm not seeing... Thanks!
One thing I can see that is wrong is that you don't have coaches.id in your select. You need the id for coach_path(coach) to work. Try this:
#coaches = Coach.joins(:teams).select("coaches.id, coaches.first_name, coaches.last_name, teams.team_level")
Not sure if this solves the join error you are getting.

Rails - Rendering an edit form partial within another partial

I have a table that I am trying to make a bit more streamlined. In my view (this view is already a partial (_recipe_ingredient.html.erb), I have the following code, where rendering the partial is not working:
<tr>
<td><%= recipe_ingredient.ingredient.name %></td>
<td><%= recipe_ingredient.ingredient.weight1*recipe_ingredient.quantity %></td>
<td><%= recipe_ingredient.ingredient.description1 %></td>
<td><%= recipe_ingredient.quantity %></td>
<td><%= render(:partial => 'recipe_ingredients/edit', :locals =>
{:recipe_ingredient=> recipe_ingredient}) %></td>
<td><%= link_to 'Remove', recipe_ingredient, :confirm => 'Remove ingredient from
recipe?', :method => :delete %></td>
</tr>
Previously, I was using link_to to edit the recipe_ingredient as follows (which worked fine), but I would like not to have the user go to another page to edit - instead I want the form to be part of the table:
<td><%= link_to 'Edit Quantity', edit_recipe_ingredient_path(recipe_ingredient) %></td>
The edit partial (which the new non-working code calls) looks like:
<h1>Editing recipe_ingredient</h1>
<%= render 'recipe_ingredients/form', :recipe_ingredient => #recipe_ingredient %>
And the standard form partial looks like:
<%= form_for(#recipe_ingredient) do |recipe_ingredient| %>
<% if #recipe_ingredient.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#recipe_ingredient.errors.count, "error") %> prohibited this
recipe_ingredient from being saved:</h2>
<ul>
<% #recipe_ingredient.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= recipe_ingredient.label :quantity %><br />
<%= recipe_ingredient.number_field :quantity %>
</div>
<div class="actions">
<%= recipe_ingredient.submit %>
</div>
<% end %>
Mainly, I'm confused why it works using link_to, but I can't simply render the partial. The error I'm getting is undefined method `model_name' for NilClass:Class in the first line of the form partial.
I've tried taking the "#" off #recipe_ingredient in the form partial, but that doesn't work either.
Thanks in advance for any help.
just create object with #recipe_ingredient in your action i think its an edit action.
#recipe_ingredient = RecipeIngredient.find_by_id(params[:id)
hope this will work fine.

How to get selected value in select in rails 3?

I want to know how to get the selected value of <select>. I only know how to populate this.
Here's is my code in index.html.erb. I used this to populate the <select> dropdown menu.
<h1>Trap</h1>
<%= form_for #search do |f| %>
<p>
Employee Code:
<%= f.select(:empcode_contains, #employee.collect {|e| [ e.empcode, e.id ]}) %>
</p>
<p class="button"><%= f.submit "Search" %></p>
<% end %>
<p>
Sort by:
<%= sort_link #search, :empcode %> |
<%= sort_link #search, :date_entry %> |
</p>
<table>
<tr>
<th>Empcode</th>
<th>Date entry</th>
<th></th>
<th></th>
<th></th>
</tr>
<% #traps.each do |trap| %>
<tr>
<td><%= trap.empcode %></td>
<td><%= trap.date_entry %></td>
<td><%= link_to 'Show', trap %></td>
<td><%= link_to 'Edit', edit_trap_path(trap) %></td>
<td><%= link_to 'Destroy', trap, :confirm => 'Are you sure?', :method => :delete %></td>
</tr>
<% end %>
</table>
<br />
<%= link_to 'New Trap', new_trap_path %>
And in my controller traps_controller.rb:
def index
#search = Trap.search(params[:search])
#traps = #search.all
#employee = Employee.all
Trap.all.each do |t|
Employee.create(:empcode => t.empcode)
end
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #traps }
end
end
Pls tell me how to get the selected value if the user selects a value. I don't have any idea.
Try (in the controller) :
value = params[:empcode_contains]
or you could fetch the whole object this way:
search = params[:search]

Getting current_user error when using Ryan Bates' CanCan authorization plugin

The portion of the view that is applicable:
<% #projects.each do |project| %>
<tr>
<td><%= project.name %></td>
<td><%= project.description %></td>
<td><%= link_to 'Show', project %></td>
<% if can? :update, #project %>
<td><%= link_to 'Edit', edit_project_path(project) %></td>
<% end %>
<% if can? :destroy, #project %>
<td><%= link_to 'Destroy', project, :confirm => 'Are you sure?', :method => :delete %></td>
<% end %>
</tr>
<% end %>
models/ability.rb
class Ability
include CanCan::Ability
def initialize(designer)
can :read, :all
end
end
This is the error I get:
NameError in Projects#index
undefined local variable or method `current_user' for #<ProjectsController:0x000001016d62d8>
Extracted source (around line #18):
15: <td><%= project.description %></td>
16: <td><%= link_to 'Show', project %></td>
17:
18: <% if can? :update, #project %>
19: <td><%= link_to 'Edit', edit_project_path(project) %></td>
20: <% end %>
21:
Thoughts?
I had errors in my AuthLogic install. Or rather, not errors, but when I installed it I used current_designer (which was the main user I was concentrating on) rather than current_user.
It seems CanCan didn't like that.
So I am now in the process of re-doing all my user models. But so far, it seems to have fixed this issue.