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POHow to display multiple record of same type only once?
 

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  1. POHow to display multiple record of same type only once?
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    <p>I have a rails 3.1.12 application, in which suppose i have a table <strong>A</strong> and in that i have some data and it is associated with table <strong>B</strong> with has_many relationship, i mean to say </p> <pre><code>class A &lt; ActiveRecord::Base has_many :B, :conditions =&gt; {:type =&gt; "B"}, :dependent =&gt; :destroy has_many :c, :class_name =&gt; "B", :conditions =&gt; {:type =&gt; nil}, :dependent =&gt; :destroy end </code></pre> <p>and in B's model i have :</p> <pre><code>class B &lt; ActiveRecord::Base belongs_to :A end </code></pre> <p>and i have some data in my table <strong>C</strong> which is inherited from <strong>B</strong></p> <pre><code> - **name** **amount** - c1 10 - c2 20 - c3 5 - c1 4 - c2 15 </code></pre> <p>and i want to display this duplicate items only one time something like:</p> <ul> <li><strong>name</strong> *<em>amount</em>* <ul> <li>c1 14</li> <li>c2 35</li> <li>c3 5</li> </ul></li> </ul> <p>But i don't have any idea how to get this, i have tried <code>**group_by**</code> and <code>uniq</code> methods but they are not working in my case.In my controller <strong>A</strong> on view action i have declare all this like:</p> <pre><code>class AsController &lt; ApplicationController def show @a = A.find(params[:id]) @bs = @a.bs @cs = @a.cs respond_to do |format| format.html # show.html.erb format.xml { render :xml =&gt; @a } end end end </code></pre> <p>and In my view file i have called all these like:</p> <pre><code>&lt;%= render :partial =&gt; "b_item_details", :collection =&gt; @bs %&gt; &lt;%= render :partial =&gt; "c_line_item_details", :collection =&gt; @cs %&gt; </code></pre> <p>I am sure some might faced such issue, any help would be thankful</p> <p>Actually i want to display unique records i mean if c1 has 4 entries and c2 has 3 entries than while displaying i want to display c1 and c2 only once and their total should be total of all their entries (c1+c1+c3+c4) </p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USRavindra
    1. USRavindra
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. PO
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    1. This table or related slice is empty.
    1. COIt's unclear what you want here. If you only need the unique amounts from the C table, you can do something like `@a.cs.pluck(&:amount).uniq`, which will be very efficient. If you need the name alongside it, you should be clearer about what you consider to be "duplicate" entries.
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      1. POHow to display multiple record of same type only once?
      1. UStyler
    2. CO@tyler i have updated my question please have a look, at the end
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      1. POHow to display multiple record of same type only once?
      1. USRavindra
 

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