Hopefully this is just a quicky....
I have a form to edit a product and each product belongs to a category.
In the form_for(#product) I can populate a select box for the categories in a couple of ways:
<%= f.select :category_id, Category.find(:all).collect{|c| [c.category, c.id]}, :prompt => "Pick a Category" %>
or:
<%= f.select :category_id, options_from_collection_for_select(Category.find(:all), :id, :category) %>
The first option remembers the category when editing the product, the second option doesn't.
Can anybody enlighten me as to why? Is there a way to use the options_from_collection_for_select in this scenario and have it remember the category upon editing?
Cheers,
Adam
The Codeglot's answer should have been:
<%= f.collection_select :category_id, Category.all, :id , :name %>
(See Rails: undefined method `map' for Ingredient for explanation)
<%= f.collection_select :category_id, Category, :id , :name %>
make sure you change :name to the field that you want displayed. It's probably :name or :title
Try this:
<%= f.select :category_id, options_from_collection_for_select(Category.find(:all), :id, :category, params[:category_id].to_i) %>
Related
In my Rails app, I'm using simple_form.
I'm trying to use grouped collection selects.
Without simple_form, this works:
<%= f.label :employee_id, "Lead3:" %>
<%= f.grouped_collection_select :employee_id, Workgroup.order(:id) , :employees, :group, :id, :employee_full_name %>
But, my simple_form attempt doesn't - the dropdown is empty:
<%= f.input :employee, collection: #workgroups, as: :grouped_select, group_method: :employees, :label => 'Lead2:' %>
OR
<%= f.association :employee, collection: #workgroups, as: :grouped_select, group_method: :employees, :label => 'Lead2:' %>
I would suggest to check your #workgroups definition in the controller. It probably returns nil or is not specified. Depending on what action calls your form, you should have something like this:
#workgroups = Workgroup.all(order: id)
I'm pulling a list of categories from a model.
In the admin section I want to use it to assign categories to products.
It's working fine but the list shows in the order the categories have been added.
I'd like to sort them alphabetically but I can't suss it out.
I'm sure it's pretty simple (hopefully)
here's my code:
<%= simple_form_for(#game) do |f| %>
<%= f.input :name %>
<%= f.input :description %>
<%= f.input :copy %>
<%= f.input :image %>
<%= f.input :thumbnail %>
<%= f.input :heroimage %>
<%= f.association :category, collection: #categories %>
<%= f.button :submit %>
<% end %>
I tried to add a .sort_by(desc) or just .sort on the collection method but it doesn't change the list.
Cheers
Here is how you should update your code:
<%= f.association :category, collection: Category.order('name ASC') %>
This assumes you want to sort by the category name, in ascending order.
I imagine #categories is assigned as an arel in your controller, can you add an .order("description") to that; e.g.
#categories = Category.order('description')
I'm trying to pass in two variables for a Nested Model form to use, but I'm getting an error. It's probably an easy syntax error that someone experienced could see right away, but I don't see it.
I have a template showing users, if you click one, it should take the user_id and community _id for use in the form. Both community and user are properly declared in the controller.
link to form:
<%= link_to "award badge", award_badge_badges_path, :user_id => user.id, :community_id => #community.id %>
The form uses two models - badge and badge winners. The user_id and community_id are needed for badge_winners which is nested in badges. The error I'm getting is "undefined local variable or method 'user_id' for #<#<Class:0x77544c0>:0x7714230>" so I think that something is wrong with the 2nd and 3rd lines in the form. Here's the form:
<%= form_for(#badge) do |f| %>
<%= f.hidden_field :user_id ,:value => user_id %>
<%= f.hidden_field :community_id ,:value => community_id %>
<%= f.label :Description %>
<%= f.text_area :description %>
<%= f.fields_for :badge_winners do |builder| %>
<%= render "badge_winner", :f => builder, :locals => {:user_id => user_id, :community_id => community_id} %>
<% end %>
<%= f.submit "Give Badge" %>
<% end %>
the show template in the controller:
def award_badge
#badge = Badge.new
badge_winners = #badge.badge_winners.build
end
the badge winner partial
<%= f.hidden_field :user_id ,:value => user_id %>
<%= f.hidden_field :community_id ,:value => community_id %>
I have a Model called Category and other Model Product. They have has_many and belongs_to relation.
But code in my view
<p><%= f.collection_select(:product, :category_id, Category.all, :id, :name)%>
is giving me
undefined method `merge' for :name:Symbol
Any clue what is wrong with it?
Chances are you have something like this:
<%= form_for #product do |f| %>
Because f is already tied to product, you don't need to include it as your first argument, so it should just be:
<%= f.collection_select :category_id, Category.all, :id, :name %>
Or, you could not use f.:
<%= collection_select :product, :category_id, Category.all, :id, :name %>
In my first rails app I'm trying to use form_for and fields_for to create a nested object form. So far so good, but I can't figure out how to access the sub-object while in the fields_for block. I've pre-populated a field in the sub-object with data that I want to show in the user instructions.
Models
Garage:
has_many :cars, :dependent => :destroy
accepts_nested_attributes_for :cars
Car:
belongs_to :garage
Garage Controller
def new
#garage = Garage.new
for i in 1..5
#garage.cars.build :stall_number => i
end
end
_form.html.erb
<%= form_for #garage do |f| %>
<%= f.label :title, "Garage Name" %><br />
<%= f.text_field :title %>
<% f.fields_for :cars do |builder| %>
<p>Enter license for car parked in stall: <%= car.stall_number %></p>
<%= f.label :license, "License #:" %><br />
<%= f.text_field :license %>
<%= end %>
<%= end %>
As you can see, inside the builder block for :cars, I want to show, in my user instructions, the field: car.stall_number (populated in my controller with an integer):
<p>Enter license for car parked in stall: <%= car.stall_number%></p>
I've tried a many different ideas: #car.stall_number, object.car.stall_number, etc. No joy. Multiple searches and a look at the fields_for source code haven't helped my understanding. I would appreciate any guidance.
Update: For clarification, per Dan's suggestion I have tried builder.stall_number but it results in a
NoMethodError: undefined method 'stall_number' for #<ActionView::Helpers::FormBuilder:0x00000102a1baf0>
I just dealt with this today myself.
You can access the object of the fields_for through:
builder.object
where builder is your fields_for form builder object. In your particular case, you can say:
<p>Enter license for car parked in stall: <%= builder.object.stall_number%></p>
That should do it for you!
The way you are trying is does not work because you want to access car without filling that variable for data.
I guess you want to have multiple blocks of stalls, where you can enter license plates. For each stall you will need your own fields_for.
I would suggest something like that:
<%= form_for #garage do |f| %>
<%= f.label :title, "Garage Name" %><br />
<%= f.text_field :title %>
<% for i in 1..5 %>
<% f.fields_for #garage.cars[i] do |builder| %>
<p>Enter license for car parked in stall: <%= builder.stall_number%></p>
<%= builder.label :license, "License #:" %><br />
<%= builder.text_field :license %>
<% end %>
<% end %>
<% end %>
Within the fields_for you need to use the form object you define there, in this case builder. Since the data there are not mapped to the outer form (f), but to the cars object (builder).