My code has send s
<% url = url_for(:controller => 'boxelements', :action => 'new', :project_id => #project.id, :author_id => User.current.id) %>
<%= link_to "Upload New File",url %>
from new method I can get the param values
def new
#boxelement = Boxelement.new
puts params[:project_id]
puts params[:author_id]
end
Here is how I send this value as a form input
<%= f.hidden_field :project_id, :value =>project_id %>
<%= f.hidden_field :author_id, :value =>User.current.id %>
I need to access those value from create method of the controller
def create
#boxelement = Boxelement.new(params[:boxelement])
if #boxelement.save
puts params[:project_id]
puts params[:author_id]
end
end
This code shows nothing when they are in create method of controller.
puts params[:project_id]
puts params[:author_id]
What's wrong with my code?
From this line I can assume you want to access params of :boxelement
#boxelement = Boxelement.new(params[:boxelement])
use the following line in order to access the params value.
puts params[:boxelement][:project_id]
puts params[:boxelement][:author_id]
Related
I'm learning Ruby on Rails at the moment and we're making a blog app to learn about crud actions and such and I'm stuck on this create method in my controller not working as it does in the course. I'm having trouble the create method in this controller:
class ArticlesController < ApplicationController
def show
#article = Article.find(params[:id])
end
def index
#articles = Article.all
end
def new
end
def create
#article = Article.new(params.require(:article).permit(:title, :description))
#article.save
redirect_to #article
end
end
I get this error when trying to create an article:
ActionController::ParameterMissing in ArticlesController#create
param is missing or the value is empty: article
It seems to be getting hung up on the first line of the create method but I'm not sure why it doesn't think there's an article... Here's my new article view as well for further reference:
<h1>Create a new Article</h1>
<%= form_with scope: #article, url: articles_path, local: true do |f| %>
<p>
<%= f.label :title %><br/>
<%= f.text_field :title %>
</p>
<p>
<%= f.label :description %><br/>
<%= f.text_area :description %>
</p>
<p>
<%= f.submit %>
</p>
<% end %>
Check whether your parameters coming under hash with key article like this -
{"article"=>{params}}
Also initiate Article object in new action.
You can redefine the params to permit like this:
in controller new method create object
#article = Article.new
and in form HTML add one more option use method: "post"
I have just started out programming with ruby on rails. I really like it, but sometimes it's really complicated. What I am trying to do is to get the selected value out of the select_tag and pass it to the Model where I will multiply the value to another one (that comes from an from_for textfield).
The problem is I wasn't able to figure out how to get the value from the View to the Controller and then to the Model.
Here is my code:
View:
<%= label_tag 'Remind' %>
<%= f.number_field :remind %>
<%= select_tag :select_conv, options_for_select([['Day', 1], ['Week', 7], ['Month', 30]]) %>
Controller:
def create
add = Item.new(item_params)
if add.save
flash[:notice] = ''
redirect_to items_path
else
redirect_to new_item_path
flash[:error] = ''
end
private
def item_params
params.require(:item).permit(:itemname, :amount, :bbf, :remind)
end
end
Model:
def convert_to_d
convert = self.remind * self.v_convertor
self.assign_attributes(remind: convert)
end
Thank you in advance
You have to do some changes:
View:
<%= label_tag 'Remind' %>
<%= f.number_field :remind %>
<%= select_tag :select_conv, options_for_select([['Day', 1], ['Week', 7], ['Month', 30]]) %>
From the View, it will return a hash with the values of each user's input. So, for this example, it will return:
params = { remind: user_input, select_conv: user_input }
You can catch that in your controller with the method item_params, but
you have to specify the parameters that you want in your method, so your item_params should be:
Controller:
def create
add = Item.new(item_params)
if add.save
flash[:notice] = ''
redirect_to items_path
else
redirect_to new_item_path
flash[:error] = ''
end
end
private
def item_params
params.require(:item).permit(:itemname, :amount, :bbf, :remind, :select_conv) # << update here
end
In your model, you can access the values saved in item_params with their names, as you did with self.remind, you can call it with self.select_conv.
Model:
# self.select_conv can be used now.
def convert_to_d
convert = self.remind * self.v_convertor
self.assign_attributes(remind: convert)
end
You can also use some validations in your model to guarantee integrity from the user's data. For more information about validations.
I really don't get how to use Ajax with Ruby on Rails. I must be missing something simple.
What I want to do is to ask the user to select a date, and then make a table of documents appear, but only with the selected date (Date is an attribute of Document).
My idea is to create a local variable witch is not in my database, store the selected date in it, and then create a loop in my view saying for example #document.where(:date = date).each...
In app/controllers/documents_controller.rb, I have :
class DocumentsController < ApplicationController
def information
#documents = Document.all
#date = params[:date]
respond_to do |format|
format.html # index.html.erb
format.js{}
format.json { render json: #documents}
end
end
end
And in app/views/documents/_information.js.erb, I have:
<%= form_tag(document, :remote => true) do %>
<%= label_tag(:date, "The selected date is:") %>
<%= text_field_tag(:date) %>
<%= submit_tag %>
<% end %>
In the end, I have a field where the user puts his date, but the submit button doesn't do anything.
What do I miss ?
As discussed you need to change the flow of your app.Lets go through steps one by one
a. create your input field where you are selecting your date field. You already have your form for that
<%= form_tag(you_path_for_information_method, :remote => true) do %>
<%= label_tag(:date, "The selected date is:") %>
<%= text_field_tag(:date) %>
<%= label_tag(:portfolio, "Add portfolio") %>
<%= text_field_tag(:portfolio) %>
<%= submit_tag %>
<% end %>
In controller
def information
#documents = Document.all
#date = params[:date]
#portfolio = Portfolio.find(params[:portfolio])
respond_to do |format|
format.js{}
end
end
In your information.js.erb you can have:
$("#some_id_of_parent").html("<%=j render partial: "your_partial", locals: {portfolio: #portfolio} %>")
I am working on a multisite for a client for a skateboarding website. So far everything is great but I am starting to get stuck on the whole partial thing. I have a site and site has_many :albums(Album also belongs to site) but when I try to render albums from a site on the sites homepage i get undefined method `model_name' for NilClass:Class?
I have am trying to render albums/_album.html.erb on the sites/show page to display a site latest's album on the homepage of the site.
Albums Controller
class AlbumsController < ApplicationController
def index
#albums = Album.all
end
def show
#album = Album.find(params[:id])
end
def new
#album = Album.new
end
def edit
#album = Album.find(params[:id])
end
def create
#album = current_site.albums.build(params[:album])
if #album.save
redirect_to albums_path, :notice => 'Album was successfully created.'
end
end
def update
#album = Album.find(params[:id])
if #album.update_attributes(params[:album])
redirect_to album_path(#album), :notice => 'Album was successfully updated.'
end
end
def destroy
#album = Album.find(params[:id])
#album.destroy
end
end
Sites Controller
class SitesController < ApplicationController
def index
#sites = Site.all
end
def show
#site = Site.find_by_subdomain!(request.subdomain)
end
def new
#site = Site.new
end
def edit
#site = Site.find(params[:id])
end
def create
#site = Site.new(params[:site])
if #site.save
redirect_to #site, :notice => 'Signed up!'
end
end
def update
#site = Site.find(params[:id])
if #site.update_attributes(params[:site])
redirect_to #site, :notice => 'Site was successfully updated.'
end
end
def destroy
#site = Site.find(params[:id])
#site.destroy
end
end
Site Show.html
<p id="notice"><%= notice %></p>
<p>
<b>First name:</b>
<%= #site.first_name %>
</p>
<p>
<b>Last name:</b>
<%= #site.last_name %>
</p>
<p>
<b>Subdomain:</b>
<%= #site.subdomain %>
</p>
<%= render :partial => 'albums/album'%>
<%= link_to 'Edit', edit_site_path(#site) %> |
<%= link_to 'Back', sites_path %>
Albums/_album.html.erb
<%= div_for #album do %>
<h2><%= #album.title %></h2>
<%= image_tag #album.photo.url(:small) %>
<% end %>
Am I missing something in my albums controller?
In your show.html, you need to pass in the collection of albums to the render method
<%= render :partial => 'albums/album', :collection => #site.albums %>
Within the _album.html.erb partial, you need to reference the album attribute as a local attribute, like so
<%= div_for album do %>
<h2><%= album.title %></h2>
...
You can read more about partials here 3.4.5 Rendering Collections
I am relative newbie to all this, so sorry if this sounds mad!
I have used this tutorial: http://www.railsmine.net/2010/03/rails-3-action-mailer-example.html
And I have a new contact form working great.
The controller is at app/controllers/support_controller.rb
class SupportsController < ApplicationController
def new
# id is required to deal with form
#support = Support.new(:id => 1)
end
def create
#support = Support.new(params[:support])
if #support.save
redirect_to('/', :notice => "Support was successfully sent.")
else
flash[:alert] = "You must fill all fields."
render 'new'
end
end
end
And the model at /app/models/support.rb
class Support
include ActiveModel::Validations
validates_presence_of :email, :sender_name, :support_type, :content
# to deal with form, you must have an id attribute
attr_accessor :id, :email, :sender_name, :support_type, :content
def initialize(attributes = {})
attributes.each do |key, value|
self.send("#{key}=", value)
end
#attributes = attributes
end
def read_attribute_for_validation(key)
#attributes[key]
end
def to_key
end
def save
if self.valid?
Notifier.support_notification(self).deliver!
return true
end
return false
end
end
The views however only work in views/supports/new.html.rb (rendered - views/supports/_form.html.erb)
So I can call the Model / Controller from localhost:3000/support/new but if I try and render the same form in another view from the root directory e.g. app/view/contact.html.erb I get:
undefined method `model_name' for NilClass:Class
I think this is because it is calling the support model away from the supports directory.
Do I have to create an instance on #support so it can be called? If so what is the best way of doing that? I think I am nearly there. I just want the contact form on multiple pages not just in suppport/new
Thanks
Charlie
Yes, you would need to create a #support variable in each action you wish to render your form.
Another option would be to refactor the form to take a parameter, that way you're a bit more flexible. For example, from your view:
<%= render :partial => "supports/form", :locals => {:support => #support} %>
Now, instead of referring to #support in your _form.html.erb, you'd refer to simply support as it's a local_assign.
Yet another option would be to refactor the form a little further, and worry about creating the actual form tag outside of the partial.
Such as:
app/views/supports/new.html.erb
<%= form_for #support do |form| %>
<%= render :partial => "suppports/form", :object => form %>
<% end %>
app/views/supports/_form.html.erb
<%= form.text_field :foo %>
<%= form.text_field :bar %>
...
In this case, when you render a partial with the object option, you will get a local variable in your partial with the same name as the partial. You maintain a little bit more flexibility in the path of your form, but can still render the meat of what a Support object is inside of the form while remaining consistent across your app.
To clarify, you could use this somewhere else by doing something like:
app/views/foos/_create_foo_support.html.erb
<%= form_for #foo.support do |form| %>
<%= render :partial => "supports/form", :object => form %>
<% end %>
You have to pass #support object wherever you use your contact form. It's working in SupportsController#new because you initialize the variable there. In all other places where you want to use the form, you'll have to do the same.