form-for

问题 I have form for user registration. User has to select his country via select options. When i submit form i get error Country(#70309119520500) expected, got String(#8039220) Help me please how to convert string to integer so i can insert record in database. ruby -v: ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux] rails -v: Rails 4.1.8 This is my html.rb form <%= form_for :user, url: users_path do |f| %> <div class="field"> <%= f.label :countries %> <% options = options_from

问题 I use bootstrap_form_for to create forms and have a collection select, where I want to add a custom class. I tried this, but this does not work: <%= f.collection_select :location, Location.all, :id, :name, label: 'Location', :include_blank => ("Select..."), hide_label: true, :class => 'location' %> Any ideas? 回答1: Many Rails helpers take multiple hash arguments. And the definition of this collection_select method looks like this: collection_select(object, method, collection, value_method,

问题 I use bootstrap_form_for to create forms and have a collection select, where I want to add a custom class. I tried this, but this does not work: <%= f.collection_select :location, Location.all, :id, :name, label: 'Location', :include_blank => ("Select..."), hide_label: true, :class => 'location' %> Any ideas? 回答1: Many Rails helpers take multiple hash arguments. And the definition of this collection_select method looks like this: collection_select(object, method, collection, value_method,

问题 this form_for used to work before I ported my application to rails 3.1 <div class="form-box" style="padding-left:1em;"> <% action = @existing_mass.nil? ? "add_to_power_plant": "update_power_plant_substrate"; submit_button_label = @existing_mass.nil? ? 'Add': 'Update'; %> <%= form_for :substrate_mass, @substrate_mass, :remote => true, :url => { :action => action, :substrate_id => @substrate_mass.substrate } do |f| %> <div> <%= f.label :quantity_per_year, "Quantity" %> <%= f.text_field

问题 I can't figure out how to upgrade this code from Rails 2 to Rails 3: <% remote_form_for(item, :update => 'div_id') do |f| %> ... I tried this: <%= form_for :item, :remote => true, :url => { :controller => "items", :action => "create" }, :update => 'div_id' do |f| %> ... It creates the new item but it fails in updating the content within <div id="div_id"></div> tags. It seems Rails 3 no longer supports the " :update " option for a remote form_for . Any suggestion? 回答1: You could use RJS, but

问题 I want to set up the CRUD for users, available just for administrators of my web application. So in routes.rb: namespace :admin do resources :user end which means this: admin_user_index GET /admin/user(.:format) admin/user#index POST /admin/user(.:format) admin/user#create new_admin_user GET /admin/user/new(.:format) admin/user#new edit_admin_user GET /admin/user/:id/edit(.:format) admin/user#edit admin_user GET /admin/user/:id(.:format) admin/user#show PUT /admin/user/:id(.:format) admin

问题 I am using Single Table Inheritance for managing different types of projects. Models: class Project < ActiveRecord::Base end class SiteDesign < Project end class TechDesign < Project end Edit action from projects_controller: def edit @project = Project.find(params[:id]) end View edit.html.erb: <% form_for(@project, :url => {:controller => "projects",:action => "update"}) do |f| %> ... <%= submit_tag 'Update' %> <% end %> Update action of projects_controller: def update @project = Project.find

问题 There might be answers in documentation, but i don't seem to find good answers. So among the three :url, :action, :method, what are their differences when used in form_for in Rails? 回答1: Difference between :url , :action and :method :url If you want to submit your form for any particular controller, any particular action and want to pass some extra parameter (use action that define in controller that you pass on controller ) for example <%= form_for @post, :url => {:controller => "your

问题 I'm attempting to provide a form that allows an admin to edit all values of a particular model Submission , almost as though it was a spreadsheet. Submission is comprised of one string field :domain . The problem is that I can't figure out how to deal with strong params within this context. I've found similar examples of dealing with dynamic keys like this one but I can't quite figure out how to apply them to my parameter structure. I think I'm just not clear enough on how tap works. Here's

问题 I am trying to set some params in a form_for in my view to be used by that View's Controller method called pay . Unfortunately I am getting the following error: NameError in WebApplications#pay undefined local variable or method `pay' for #<#<Class:0x000001082e1e00>:0x000001082e0fc8> Here is my View: <%= form_for pay do |f| %> <%= f.label :first_name %>: <%= f.text_field :first_name, params[:first_name] %><br /> <%= f.label :last_name %>: <%= f.text_field :last_name, params[:last_name] %><br