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POCheck db value in rails view
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2012-08-13T10:58:42.150
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Is it good to check db value in view, not in controller? Now i have such view: <pre><code>- @articles.each do |art| -if art.QUANTITYM > 0 =art.PRICEM %br = art.PRICEM * @currency.currencyvalue </code></pre> On my previous rails 3.0.9 project (now 3.2.6), all was good, but now it gives me: <blockquote> undefined method `>' for nil:NilClass </blockquote> Also my method in controller look's like this: <pre><code>def category @type_details = Type.find_by_TYP_ID(params[:type]) @search_trees = SearchTree.find(:all, :include => [:designation], :conditions => { :STR_ID_PARENT => params[:cat]}) @strlookup = StrLookup.find(:all, :conditions => { :STL_STR_ID => params[:cat]}) @genart = GenericArticle.all(:conditions => { :GA_ID => @strlookup.map(&:STL_GA_ID)}) @type = params[:type] @la_typs = LinkLaTyp.find(:all, :conditions => { :LAT_TYP_ID => params[:type], :LAT_GA_ID => @genart.map(&:GA_ID)}) data = "{ label : 1, children : [{label : 1},{label : 1}] }" #puts JSON.pretty_generate(data) if @genart.blank? @articles = nil else @linkla = LinkArt.find(:all, :conditions => { :LA_ID => @la_typs.map(&:LAT_LA_ID), :LA_GA_ID => @genart.map(&:GA_ID)}) @pre_articles = Article.find(:all, :include => [:supplier], :conditions => {:ART_ID => @linkla.map(&:LA_ART_ID)}, :order => "SUPPLIERS.SUP_BRAND, ARTICLES.QUANTITYM asc") @articles = Kaminari.paginate_array(@pre_articles).page(params[:page]).per(20) end @currency = Currency.find(:first) #@cart = current_cart #NOTE THIS!!! respond_to do |format| format.html # index.html.erb format.xml { render :xml => @search_trees } #format.json { render :json => @search_trees } end end </code></pre> How to check my db Quantity and in view accoding to value display price? Or it is "criminal", and i must do this in controller? Than how to do this check in controller and display it in view? Note, this is non-my db, so it's very huge, and have a lot of tables, and data in them.
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<ruby-on-rails><ruby><ruby-on-rails-3>
Title
Check db value in rails view
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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.