Databases
StackOverflow2013
Postsdbo
PORails 2: How can I get the return object of a method and print it on a view?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PORails 2: How can I get the return object of a method and print it on a view?
    primarykey
    data
    text
    <p>I developed hours ago a fuzzy method on <code>store_controller.rb</code>. This method, named <code>fuzzy</code>, gets the product quantity as argument, then, with if statements, checks the value and returns an object named <code>disp</code>. I call this method on the view <code>index.html.erb</code>.</p> <p>Now, in the view, I inserted a line that checks the value of <code>disp</code>. By the value of <code>disp</code>, the view must print out a different image that displays the available quantities of product, for example, <code>available</code> or <code>not available</code>. But, inserting this line, I got an error: <code>undefined local variable or method 'disp' for #&lt;ActionView::Base:0x6dc1864&gt;</code></p> <p>This is the code of the view <code>index.html.erb</code>:</p> <pre><code>&lt;% for product in @products -%&gt; &lt;div class="entry"&gt; &lt;%= image_tag(product.image_url) %&gt; &lt;h3&gt;&lt;%=h product.title %&gt;&lt;/h3&gt; &lt;%= product.descr %&gt; &lt;br /&gt;&lt;div class="disp"&gt; &lt;p&gt;&lt;% fuzzy(product.quantity) %&gt;&lt;% if disp == 0 %&gt;&lt;%= image_tag("nodisp.png", :border =&gt; "0") %&gt;&lt;% end %&gt;&lt;% if disp == 1 %&gt;&lt;%= image_tag("disp.png", :border =&gt; "0") %&gt;&lt;% end %&gt;&lt;/p&gt; &lt;/div&gt;&lt;br /&gt; &lt;p&gt;&lt;span class="price"&gt;&lt;%= number_to_currency(product.price, :unit =&gt; "&amp;euro;") %&gt;&lt;/span&gt;&lt;/p&gt; &lt;% form_remote_tag :url =&gt; { :action =&gt; :add_to_cart, :id =&gt; product } do %&gt; &lt;%= submit_tag "add to cart!" %&gt; &lt;% end %&gt; &lt;/div&gt; &lt;% end %&gt; </code></pre> <p>Please notice the call of method <code>fuzzy</code>. This method is inserted in <code>store_controller.rb</code>:</p> <pre><code>def fuzzy(q) disp = (q-5)/20 if q &gt; 9 then disp = 1 end if q &lt; 7 then disp = 0 end return disp end </code></pre> <p>The question is: When I execute the code in the view, calling fuzzy method, how I can get the result <code>disp</code> of the method, and, with if statements, diplay it on the view? Is it possible?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USsawa
    1. USAlberto Solano
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PORails 2: How can I get the return object of a method and print it on a view?
      1. USAlberto Solano
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload