Call a controller method from a view

rubyonrails-talk
1

Hi, I am trying to call a controller method from my view, but I get an error and I don't know how to correct it. What i am trying to do: I am in the edit form of the model Product, and products can have many ingredients. So on my edit form there is a text_field where you type the ingredient with a link "Add" which is supposed to add the typed ingredient to the current ingredients list.

this is how i try to call my controller method: <%=link_to "Add",:action => :add_ingredient,:id => @product %>

This is my method in the controller:   def add_ingredient     if @product.id.blank?       @product = Product.find(params[:id])     end     @product.ingredients << Ingredient.find_or_create_by_name(params[:search])     @product.update_attributes(params[:product])   end

The error: Unknown action No action responded to 30. Actions: add_ingredient, create, destroy, edit, index, new, show, and update

the url: http://localhost:3000/products/30/add_ingredient

Thanks Greg

2

Try this <%=link_to "Add",:action => "add_ingredient",:id => @product %>

Note that the action name is a string.

Hope this helps

3

Hi, I am trying to call a controller method from my view, but I get an error and I don't know how to correct it. What i am trying to do: I am in the edit form of the model Product, and products can have many ingredients. So on my edit form there is a text_field where you type the ingredient with a link "Add" which is supposed to add the typed ingredient to the current ingredients list.

this is how i try to call my controller method: <%=link_to "Add",:action => :add_ingredient,:id => @product %>

This is my method in the controller: def add_ingredient if @product.id.blank? @product = Product.find(params[:id]) end @product.ingredients << Ingredient.find_or_create_by_name(params[:search]) @product.update_attributes(params[:product]) end

The error: Unknown action No action responded to 30. Actions: add_ingredient, create, destroy, edit, index, new, show, and update

the url:http://localhost:3000/products/30/add_ingredient

assuming that you're using map.resources then you need to add add_ingredient as a member action (or you might decide that it is preferable to have ingredients as a nested resource of products) Either way you should really have a GET request that changes the state of the database

Fred

4

Hi, Thanks it works better now. But how am i supposed to access my textfield if I am using a get method in my controller?

Route:   map.resources :products,     :member => {:add_ingredient => :post }

Controller: <%= text_field_with_auto_complete :product, :ingredient_name,{},     {:url => formatted_ingredients_path(:js), :method => :get, :with => "'search=' + element.value"} %> <%=link_to "Add",:action => "add_ingredient",:id => @product%>

Frederick Cheung wrote:

5

Greg,

Since its a post request, you should have a form in your view, which when submitted, will ensure that all the text fields etc. are available in your controller.

Punit

Greg Ma wrote: