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Postsdbo
PO
 

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    <p>Looks like it should be:</p> <pre><code>#GET /students/{:id} def show @student = Student.find_by_url(params[:id]) #BULLETS Randomizing /students/new.html.erb if cookies[:bullets].nil? @bullets = Bullet.all.shuffle.first(4) cookies[:bullets] = @bullets.collect(&amp;:id) else # simpler to use an 'in list' for only 4 id's Bullet.where("id in (?)", cookies[:bullets]) end respond_to do |format| format.html # show.html.erb format.json { render json: @student } end end </code></pre> <p>Notice I converted your loop over the <code>cookies</code> array into a single statement with an 'in list' -- that should simplify the sql generated for the lookups.</p> <p>Although, it's arguable that this code should be pushed into the model:</p> <pre><code>class Bullet &lt; ActiveRecord::Base NUM_USER_BULLETS = 4 # fetch a random set of def self.user_bullets Bullet.all.shuffle.first(NUM_USER_BULLETS) end end </code></pre> <p>Or something similar. Then your controller is simpler:</p> <pre><code>#GET /students/{:id} def show @student = Student.find_by_url(params[:id]) #BULLETS Randomizing /students/new.html.erb if cookies[:bullets].nil? @bullets = Bullet.user_bullets cookies[:bullets] = @bullets.collect(&amp;:id) else # simpler to use an 'in list' for only 4 id's Bullet.where("id in (?)", cookies[:bullets]) end respond_to do |format| format.html # show.html.erb format.json { render json: @student } end end </code></pre> <p>With the code migrated into your model, your controller is simpler.</p>
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    1. POReturns undefined method 'each' for nil:NilClass?
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    1. USKevin Bedell
    1. USKevin Bedell
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    1. COAnd the "id in (?)". Does it need something in place of '?'
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    2. COThe syntax `where("id in (?)", cookies[:bullets])` basically means *substitute the variable `cookies[:bullets]` for the `?` in the actual query*.
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    3. COOhhh okay, thank you. May I ask why my second edit on the question worked the first time, but not the second (after a refresh)?
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