I am having trouble passing a non-model form field from view to controller. The value I am trying to pass is amount
Thank you.
views/donations/index.html.erb
<%= form_tag donations_path, style: (current_user.card_last4? ? "display:none" : nil) do %>
<div id="error_explanation">
<% if flash[:error].present? %>
<p><%= flash[:error] %></p>
<% end %>
</div>
<article>
<%= label_tag(:amount, 'Donation Amount:') %>
<%= text_field_tag(:amount) %>
</article>
<%= link_to 'Donate', new_donation_path(amount: :amount), class: 'btn btn-primary', id: 'donateButton' %>
<% end %>
controllers/donations_controller.erb
def create
customer = current_user.stripe_customer
amount = params[:amount]
token = params[:stripeToken]
begin
Charge.charge(amount, token)
end
...
models/charge.rb
def self.charge(amount, token)
charge = Stripe::Charge.create(
amount: amount,
source: token,
currency: 'usd',
description: 'Test Charge'
)
end
...
Use a view tag like
<%= text_field_tag 'donation[amount]' %>
And permit the parameter in your controller
def donation_params
params.require(:donation).permit(:amount)
You can access the value with donation_params[:amount].
You shouldn't use link_to to trigger the form submission. Use submit_tag instead. Besides that, make sure your strong params whitelist whatever you're submitting.
I guess you are not using strong params. Why not just add |f| at the end like this
<%= form_tag donations_path, style: (current_user.card_last4? ? "display:none" : nil) do |f| %>
and then use <%= f.text_field :amount %>
Then at the params you should do something like params["donation"]["amount"] to get the value
EDIT: at the end change link_to for f.submit
Related
In the first controller, I set my session variables:
def show
#item = Item.find(params[:id])
session[:item_id] = #item.id
session[:amount] = params[:amount]
end
My view sets the amount with a form_tag:
<%= form_tag checkout_transaction_path, method: :get do %>
<%= label_tag :amount %>
<%= text_field :amount, placeholder: "Total bid amount", autofocus: true %>
<%= submit_tag "submit" %>
<% end %>
The parameters that get sent with this form look like this:
Parameters: {"utf8"=>"✓", "amount"=>{"{:placeholder=>\"Total bid amount\", :autofocus=>true}"=>"1111"}, "commit"=>"Confirm offer", "id"=>"1"}
The second controller tries to assign the session variable to an instance variable.
def checkout
#item = session[:item]
#amount = session[:amount]
end
However, only #item is working. I try to multiply #amount * 0.10 but get this error: undefined method '*' for nil:NilClass
What causes that error? The submit params says it's being submitted, but maybe something is up with the way I try to retrieve it? session[:item_id] goes through perfectly.
You have issue here:
Parameters: {"utf8"=>"✓", "amount"=>{"{:placeholder=>\"Total bid amount\", :autofocus=>true}"=>"1111"}, "commit"=>"Confirm offer", "id"=>"sam-lipp-abandonment"}
In your parameters, you send amount parameters but in amount, you send HTML form "amount"=>{"{:placeholder=>\"Total bid amount\", :autofocus=>true}"=>"1111"}, but should send only value what you set in the amount form, and your amount parameters should looks like this example! "amount"=>"1"
So this means that your form doesn't work correctly!
Try please replace your form on this one, and in a controller, you will get amount!
<%= form_for #new_item, url: checkout_transaction_path do |f| %>
<%= f.label :amount %>
<%= f.text_field :amount, placeholder: "Total bid amount", autofocus: true %>
<%= submit_tag "submit" %>
<% end %>
OR the same code for form_tag
<%= form_tag checkout_transaction_path do %>
<%= label_tag :amount %>
<%= text_field_tag :amount, placeholder: "Total bid amount", autofocus: true %>
<%= submit_tag "Submit Post" %>
<% end %>
The problem in your form can be here:
you wrote text_field instead text_field_tag
Also for form_for form, you need to add in the controller in a method with variable what you will use in your form, for example, I'm using variable #new_item where from you call this form, something like this
def new
#new_item = Item.new
end
I need to get an integer(#integer) from the form in my root_path, do multiplication (#integer*45) and display the result on the same page. How can I do it without any models in my application?
Please, share your best practice. Thank you!
I was trying to do next:
CalculatorsController
def calculation
#integer = params[:integer]
#result = #integer*45
end
def result
end
root.rb
root :to => 'calculators#result'
resources :calculators, :collection=>{:result => :get, :calculation => :post}
calculators/result.html.erb
<% form_tag root_path, :html => {:method => :post} do %>
<%= label_tag 'integer' %>
<%= text_field_tag :integer %>
<div><%= submit_tag 'OK' %></div>
<% end %>
I'll do it with ajax, so there is no need for page refresh:
First, update the routes, for your example you only need two routes, one get (or root) and one post.
routes.rb:
Rails.application.routes.draw do
root 'calculators#result'
post 'calculators/calculation'
end
Next, update your view:
Change the url in your form_tag where the data will be sent (to calculation action instead of result).
Add remote: true option to enable ajax.
Add a tag where you will display your result.
result.html.erb:
<% form_tag calculators_calculation_url, remote: true do %>
<%= label_tag 'integer' %>
<%= text_field_tag :integer %>
<div><%= submit_tag 'OK' %></div>
<% end %>
<div id="total"></div>
And create a view for calculation action, but since you are using ajax, you will create it as js.erb and include the required javascript (or jQuery) to update your view (i'm using jQuery in the example).
calculation.js.erb:
$('#total').html('<%= #result %>')
Now when you click submit, your form will be sent to calculation action and will update the div with #result.
Just add the field to your form...
<% form_tag root_path, :html => {:method => :post} do %>
<%= label_tag 'integer' %>
<%= text_field_tag(:integer, #integer) %>
<% if #result.present? %>
<br>
Result is: <%= #result %>
<br/>
<% end %>
<div><%= submit_tag 'OK' %></div>
<% end %>
And then render result in your calculate...
def calculation
#integer = params[:integer].to_i
#result = #integer*45
render :result
end
Your result view (result.html.erb) is getting its data from the result method, not calculation. Update your controller as follows:
def calculation
#integer = params[:integer]
end
def result
#result = #integer*45
end
You then need a tag to display your result in the view, something like:
<p> <%= #result %> </p>
I'm playing with the messenger gem in rails 4.
I have a graph of nodes and I want to be able to bring up a message box (initially in a different page but will make it a partial later) when a node is pressed so that the current user can message that node.
The id for the clicked node is kept in a div called NameID
At the moment all I've got working is a button that opens the new message page and then you can choose a user from a drop down list. I guess I want that drop down list- the recipient- to be prepopulated from the currently clicked node on the index page.
Here is what I have so far:
index.html.erb
<p><a class="btn btn-lg btn-primary" id="BtnMessageNode" href="/messages/new">Start conversation</a></p>
<div id=NameID><<THIS IS POPULATED BY JAVASCRIPT>></div>
messages_controller.rb
class MessagesController < ApplicationController
before_action :authenticate_user!
def new
#chosen_recipient = User.find_by(id: params[:to].to_i) if params[:to]
end
def create
recipients = User.where(id: params['recipients'])
conversation = current_user.send_message(recipients, params[:message][:body], params[:message][:subject]).conversation
flash[:success] = "Message has been sent!"
redirect_to conversation_path(conversation)
end
end
helpers/messages_helper.rb
module MessagesHelper
def recipients_options(chosen_recipient = nil)
s = ''
User.all.each do |user|
s << "<option value='#{user.id}' data-img-src='#{gravatar_image_url(user.email, size: 50)}' #{'selected' if user == chosen_recipient}>#{user.name}</option>"
end
s.html_safe
end
end
messages/new.html.erb
<% page_header "Start Conversation" %>
<%= form_tag messages_path, method: :post do %>
<div class="form-group">
<%= label_tag 'message[subject]', 'Subject' %>
<%= text_field_tag 'message[subject]', nil, class: 'form-control', required: true %>
</div>
<div class="form-group">
<%= label_tag 'message[body]', 'Message' %>
<%= text_area_tag 'message[body]', nil, cols: 3, class: 'form-control', required: true %>
</div>
<div class="form-group">
<%= label_tag 'recipients', 'Choose recipients' %>
<%= select_tag 'recipients', recipients_options(#chosen_recipient), multiple: true, class: 'form-control chosen-it' %>
</div>
<%= submit_tag 'Send', class: 'btn btn-primary' %>
<% end %>
There are basically two ways to pass parameters to GET routes:
A. Named segments
/users/:user_id/message/new
This nested route would be great if you are sending a message to a single user.
B. Query parameters
Rails supports query parameters as well:
/message/new?to=2
Rails automatically adds query parameters to the params hash. So in this case you would do params[:to].
You can use the Rails route helpers so that you don't have to deal with encoding urls yourself:
new_message_path(to: #user.id)
Use query params for optional parameters like filters and sorting or in this case a preset. Don't use them like users?id=5.
I have a selection box on my page, and when I click the submit button I want to take the selection choice to the server as either a post or get variable (I don't think it matters). How do I link this form:
<%= form_tag(store_rates_path, method: 'get') %>
<%= label_tag(:year, "From (year)") %>
<%= select_tag(:year, options_for_select(get_select_options(1980, 2014))) %>
to this button:
<%= button_tag(link_to("Get Rates", store_rates_path))%>
You only need to provide the path to the form_for method, to link it to the rates action of your stores controller:
<%= form_tag(store_rates_path, method: "get") do %>
<%= label_tag(:year, "From (year)") %>
<%= select_tag(:year, options_for_select((1980..2014).to_a)) %>
<%= button_tag "Get Rates" %>
<% end %>
In your rates action you can then retrieve the :year parameter passed as follows:
def rates
#year = params[:year]
end
You also need to define the route in your routes.rb file as follows, if you haven't yet:
get 'stores/rate', to: 'stores#rate', as: 'store_rates'
IMPORTANT
Just note that if the rates belong to a specific store, meaning the url is something like stores/1/rate then the above get must be stores/:id/rate, which also means you need to pass the store.id to the store_rates_path in your form: store_rates_path(#store)
You can use rails submit_tag helper
<%= form_tag(store_rates_path, method: 'get') %>
<%= label_tag(:year, "From (year)") %>
<%= select_tag(:year, options_for_select(get_select_options(1980, 2014))) %>
<%= submit_tag "Get Rates" %>
<% end %>
OR
If you want to use a link or button to submit your form parameters then you can use some js magic to achieve it:
<%= form_tag store_rates_path, id: "store-form", method: 'get' %>
<%= label_tag(:year, "From (year)") %>
<%= select_tag(:year, options_for_select(get_select_options(1980, 2014))) %>
<%= link_to "Get Rates", "#", id: "store-form-btn" %>
<% end %>
$(document).on("click","#store-form-btn",function(e){
e.preventDefault();
$("#store-form").submit();
});
<%= text_area_tag :body_html, "", :class =>"required mceEditor", :id=>"txaEditableContent" %>
This is my code. I want this text_area_tag to be assigned to an object(object is note in my case) just like we use "form_for object" so that the :body_html goes straight into params[:note] on submit. How can I do this?
You have got to set first an instance of Note in the controller corresponding action:
#note = Note.new
Then, in your view put this form:
<%= form_for #note do |f| %>
<%= f.text_area :body_html, :class => "required mceEditor", :id => "txaEditableContent" %>
<%= f.submit "Submit" %>
<% end %>
Now when you click the submit button you should get the right post request as you needed.