Hi, I''ve been programming in RoR for about a week or 2-3, and I like it very much. Now, I have a certain problem that is very complicated, well for me at least :-) I have 3 database tables: recipes ingredients and another one which binds the previous 2 tables together Now, I want to have an input form where you can insert 1 recipe and a certain amount of ingredients, say 5. What do I do now: I put in my _form.rhtml-file a while loop, which generates 5 text_fields for the ingredients and i give them each a name like "ingredient_" + i.to_s Then i can read them out in my create definition in my controller by doing: params["ingredient_" + i.to_s] Ok, first I don''t like this kind code, its way to complicated, and I''m also running into problems if I want to edit a recipe... I hope someone knows some better code for this problem... Thanks alot! -- Posted via http://www.ruby-forum.com/.
For your ingredients, instead of params named ingredients_n, do ingredients[n]. Then in your controller code you can do params[:ingredients].each Pat On 1/30/06, Pieter Hoste <pieter_hoste@hotmail.com> wrote:> Hi, I''ve been programming in RoR for about a week or 2-3, and I like it > very much. > > Now, I have a certain problem that is very complicated, well for me at > least :-) > > I have 3 database tables: > recipes > ingredients > and another one which binds the previous 2 tables together > > Now, I want to have an input form where you can insert 1 recipe and a > certain amount of ingredients, say 5. > > What do I do now: I put in my _form.rhtml-file a while loop, which > generates 5 text_fields for the ingredients and i give them each a name > like "ingredient_" + i.to_s > > Then i can read them out in my create definition in my controller by > doing: params["ingredient_" + i.to_s] > > Ok, first I don''t like this kind code, its way to complicated, and I''m > also running into problems if I want to edit a recipe... > > I hope someone knows some better code for this problem... > > Thanks alot! > > -- > Posted via http://www.ruby-forum.com/. > _______________________________________________ > Rails mailing list > Rails@lists.rubyonrails.org > http://lists.rubyonrails.org/mailman/listinfo/rails >
If I try that I get this error: NameError in Recipes#new Showing app/views/recipes/_form.rhtml where line #14 raised: `@ingredients[0]'' is not allowed as an instance variable name My code is: 12: <% i = 0 %> 13: <% while i < 5 %> 14: <%= text_field ''ingredients['' + i.to_s + '']'', ''name'' %> 15: <% i += 1 %> 16: <% end %> -- Posted via http://www.ruby-forum.com/.
Are you declaring the ingredients array in your controller ? @ingredients = Array.new(5) -- Posted via http://www.ruby-forum.com/.
On 1/30/06, Pieter Hoste <pieter_hoste@hotmail.com> wrote:> If I try that I get this error: > > NameError in Recipes#new > > Showing app/views/recipes/_form.rhtml where line #14 raised: > > `@ingredients[0]'' is not allowed as an instance variable name > > > My code is: > 12: <% i = 0 %> > 13: <% while i < 5 %> > 14: <%= text_field ''ingredients['' + i.to_s + '']'', ''name'' %> > 15: <% i += 1 %> > 16: <% end %> > > --I prefer to do this with render/partial/collection: new.rhtml <%= render :partial => ''ingredient'', :collection => @recipe.ingredients %> _ingredient.rhtml <% @ingredient = ingredient -%> <%= text_field ''ingredient'', ''name'', :index => ingredient_counter %> # plus whatever other fields you want, and any HTML, etc. The helpers like text_field work in this way: 1. Take the first parameter, and look for an instance variable with the same name. ''ingredient'' requires that @ingredient be present. 2. Call a method on that instance variable with the same name as the second parameter. In this case, we''re calling @ingredient.name. 3. Wrap that output in the appropriate HTML, and set the name and id properties, etc, etc. Your earlier code didn''t work because it was looking for an instance variable called "@ingredients[''0'']".. which isn''t valid or present. The <% @ingredient = ingredient -%> code above is just making the current ingredient (which render :partial, :collection passed in) available as an instance variable; something that the helper methods require. --Wilson.
Wilson,
As a newbie myself, I really enjoyed reading your response. It was
very informative.
Thanks,
William
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