I'm running Rails v4.x and Ruby v2.3. I'd like to use a debugging tool (e.g., debugger) to dynamically test different execution paths in a Rails view. Specifically I'm trying to test the two paths of an if statement (ie., "if" block and "else" block) within a Rails view. Here is the code withing the View I'd like to test:
<% if #categories.any? %>
<% #categories.each do |category| %>
<ul class="listing">
<div class="row">
<div class="well col-md-4 col-md-offset-4">
<li class="article-title">
<%= link_to "#{category.name}", category_path(category) %>
<li><small><%= pluralize(category.articles.count, "article") %></small></li>
</li>
</div>
</div>
</ul>
<% end %>
<% else %>
<div class="center">
<p>There are no categories currently defined at this time</p>
</div>
<% end %>
To do this I'd like to be able to dynamically change the return value of the #categories.any? method so as to force the desired execution path. Is there a tool that I could use to do this? Can I do with "debugger"? Pry?. If so could you provide some simple instructions of how it could be done?
NOTE: #categories is an instant variable containing values from a data model (Category). I'd prefer not delete the contents of the Category table just to test the else part of the aforementioned code.
Regards,
Jet
Well, as you will have to edit the file anyway, to add a debugger line, you can just as well add another variable, can't you?
<% if (#categories.any? && !#never_run) || #always_run %>
Related
I am fetching data from database using the following statement
#applications = Job.find(params[:job_id]).job_applications
Using the relationships I have setup if I do
#applications.first.job
This will give me the job, application is linked with.
Inside the view I have the following code, this fails if the #applications is empty.
<% if !#applications.first.job.procedure %>
<div class="alert alert-warning">
<p>No procedure has been assigned to this job.</p>
</div>
<% end %>
How can I update the above if statement so it only runs if the #applications is not empty
you can check whether association is present or not..
<% if #applications.blank? || #applications.first.job.try(:procedure).blank? %>
<div class="alert alert-warning">
<p>No procedure has been assigned to this job.</p>
</div>
<% end %>
OR a one liner, a little ugly though
#applications.try(:first).try(:job).try(:procedure).blank?
On my views I use 1 form that includes a block that renders comments. I do not want to run it when creating a new record. So, I tried conditions like so...
<% unless #annotation_id.nil? %>
<hr>
<div class="row">
<div class="col-md-8">
<h4>Comments</h4>
<%= render #annotation.comments %>
</div>
<div class="col-md-4">
<%= render 'comments/form' %>
</div>
</div>
<% end %>
This however results in never displaying the block - also when the annotation record exists. What am I doing wrong?
You don't show that you have actually set #annotation_id to something.
A simpler way might be to use the .new_record? method instead, like:
<% unless #annotation.new_record? %>
...
<% end %>
use if #annotation.persisted? or unless #annotation.new_record?
In laravel I am use to being able to access the key in a loop. In rails I cannot find answer to how to get that from the loop.
Standard loop like so
<% #subjects.each do |subject| %>
<div class="col-md-6 subjectColumn">
<div class="subjectBox subjectBox-<%= key %>">
<h2><%= subject.title.capitalize %><h2>
<p><%= subject.description %></p>
View courses<i class="fa fa-angle-right"></i></h2>
</div>
</div>
<% end %>
I want to add the integer for the key in the code above. I have tried...
<% #subjects.keys.each do |key, subject|
...and other various things I found here and elsewhere but nothing worked. The above code created an error. Most of the things I found just did not give any number. Any help with this would be greatly appreciated. I feel I probably just have not got the syntax quite correct or something.
Use with_index:
<% #subjects.each.with_index(1) do |subject, index| %>
<div class="col-md-6 subjectColumn">
<div class="subjectBox subjectBox-<%= index %>">
<h2><%= subject.title.capitalize %><h2>
<p><%= subject.description %></p>
View courses<i class="fa fa-angle-right"></i></h2>
</div>
</div>
<% end %>
I am trying to create a todo app that will allow the user to create lists and then "todo" items under each list. However, I want each user to only be able to see his or her lists. While I've been able to partially solve it using the current_user helper, the index page shows empty space where the other users lists are hidden.
Below please find the code for the index.html.erb page inside my todo_lists views.
<% #todo_lists.each do |todo_list| %>
<div class="index_row clearfix">
<% if todo_list.user == current_user %>
<h2 class="todo_list_title"><%= link_to todo_list.title, todo_list %></h2>
<p class="todo_list_sub_title"><%= todo_list.description %></p>
<p><%= todo_list.user.first_name %></p>
<% end %>
</div>
<% end %>
<div class="links">
<%= link_to "New Todo List", new_todo_list_path %>
</div>
Here's my repo on Github, in case you need to see more of the code: https://github.com/jramoscolon/todo
Is there a way to hide these empty spaces, as well as the non-matching todo items?
Given your current view code, you are indiscriminately emitting <div class="index_row clearfix"> elements, even when the todo_list.user does not match the current_user. Simply move the whole<div> outside the current_user check, like so:
<% #todo_lists.each do |todo_list| %>
<% if todo_list.user == current_user %>
<div class="index_row clearfix">
<h2 class="todo_list_title"><%= link_to todo_list.title, todo_list %></h2>
<p class="todo_list_sub_title"><%= todo_list.description %></p>
<p><%= todo_list.user.first_name %></p>
</div>
<% end %>
<% end %>
This way, all of those empty <div> elements aren't included on the page. This should clean up all that empty space.
If your index view is user specific than the instance variable you want should be user specific as well.
Instead of #todo_lists = ToDoList.all
Use the current_user.todo_lists functionality supplied by your has_many/belongs to
So I'm trying to combine two tables and show the results in order of the start_date.
I've tried a few things but because its technically a nested loop its giving me double results for each item.
The code i currently have is as follows
<% #subcategory = Subcategory.all %>
<% #product = Product.all %>
<% (#product + #subcategory).each do |product, subcategory|%>
<% if product.display_on_home_page and !product.is_highlight_product and !(product == '..') or subcategory.
display_on_home_page and !subcategory.is_highlight_product and !(subcategory == '..')%>
<div class="column_entry">
<%= link_to image_tag(subcategory.image_attachment.url(:normal_page_size)), subcategories_content_url(subcategory.id), :controller=>'subcategories' %>
</div>
<% end %>
<% if product.price_from %>
<div class="column_entry">
<div class="product_special">
<span class="a">From Only</span>
<span class="b"><%= number_to_currency(product.price,:unit=>'€') %></span>
</div>
<%= link_to image_tag(product.product_image.url(:normal_page_size)), products_content_url(product.id), :controller=>'products' %>
</div>
<% else %>
<div class="column_entry">
<div class="product_special">
<span class="a">Only</span>
<span class="b"><%= number_to_currency(product.price,:unit=>'€') %></span>
</div>
<%= link_to image_tag(product.product_image.url(:normal_page_size)), products_content_url(product.id), :controller=>'products' %>
</div>
<% end %>
<% end %>
I know this is quite a long an complex statement, its supposed to loop through all of the subcategories and all of the products and display the images, there are also two different ways of displaying the price based on a boolean that says whether the price is a specific amount or it starts from a given price.
at the moment its reading through the loop but its giving me the error
undefined method `is_highlight_product' for nil:NilClass
since this is the first column in the table that is referenced and its breaking here I think that there must be some conflict in its ability to see the information stored in the table.
I'm still quite new to ruby on rails so any help or even just a nudge in the right direction would be very much appreciated.
If you would like more information just ask in the comments and I'll put it up as fast as I can.
The problem here is, when you do something like this:
(#product + #subcategory).each do |product, subcategory|
The local variable product will iterate firstly through products, then through subcategories, and the local variable subcategory will always be nil.
What you can do, a dirty way - check
if product.is_a?(Product)
# do your things
elsif product.is_a?(Subcategory)
# do other things
end