Why doesn't submitting this form raise an error? - ruby-on-rails

Hi I am wondering why I am not getting an error when I submit a form with an action set to a method that isn't set up yet. After submission it just keeps me on the same page with different url parameters.
Here is the form:
<form>
<%= form_tag( drop_piece_path, :method => "post" ) do %>
<% 7.times do |col| %>
<%= label_tag col %>
<%= radio_button_tag(:column, col) %>
<% end %>
<%= submit_tag("Enter move")%>
<% end %>
</form>
Here is my route:
post 'drop_piece' => 'connect_four#drop_piece', as: :drop_piece
And here is my drop_piece method in my controller:
def drop_piece
redirect_to fake_path #should raise an error because fake_path is not a real path
end
I am confused because since my form is set to submit to the drop_piece_path shouldn't that trigger the drop_piece method in my controller? Which should then raise an error?
Again, right now after form submission the application just stays on the same page with params corresponding to whichever radio button I selected.
Why doesn't this trigger my drop_piece method in my connect_four controller? Thanks for the help.

This happens because you have nested form tags. One is <form> tag and another one is <%= form_tag... %>. HTML spec doesn't allow nesting forms, so the outer one is submitted. Since it doesn't have action attribute, it is submitted to the current URL.

Related

Rails 6 create order confirmation before submit

I'm trying to create an order confirmation page for my Rails 6 app. The idea is that user will see a preview of the item they are creating before submitting and the object being saved in the database. Below desired flow:
User visits /cash_transactions/withdrawals/new
User enters data and clicks submit
User is redirected to /cash_transactions/withdrawals/confirm which
displays the entry
User clicks confirm to save object to db or cancel
Object is saved
I followed two main threads that describe this type of action, but they are quite old - 11 and 12 years old. Nevertheless based on that I've created below code:
# controllers/cash_transactions/withdrawals_controller.tb
module CashTransactions
class WithdrawalsController < CashTransactions::BaseController
(...)
def confirm
#cash_transaction = CashTransaction.new(cash_transaction_params)
render 'cash_transactions/_confirm'
end
end
end
# routes.rb
namespace :cash_transactions do
resources :withdrawals, only: %i[new create] do
collection do
post :confirm
end
end
end
With corresponding views:
# app/views/cash_transactions/new.html.erb
<%= render 'cash_transactions/form', cash_transaction: #cash_transaction %>
# views/cash_transactions/_form
# the form is rendered for cash_transaction create action
<%= simple_form_for cash_transaction, url: { action: :confirm } do |f| %>
<%= f.input :amount %>
<%= f.button :submit, 'Submit' %>
<% end %>
# confirmation page under views/cash_transactions/_confirm.html.erb
<div>
Total of withdrawal: <%= #cash_transaction.amount.to_i %>
</div>
<%= link_to 'Confim', cash_transactions_withdrawals_path(#cash_transaction), method: :post %>
<%= link_to 'Cancel', cash_transactions_path %>
And everything works until the user clicks confirm button in views/cash_transactions/_confirm.html.erb - instead of creating a record an error appears:
param is missing or the value is empty: cash_transaction
Did you mean?
authenticity_token
action
controller
_method
where did I go wrong? or there is a completely different way to do so?
tl/dr: You need to add parameters to your create request.
Why this is happening
The /confirm view is being rendered with an (unsaved) #cash_transaction object, however that object is not being used and so the information is being lost when the page is rendered.
The line:
<%= link_to 'Confim', cash_transactions_withdrawals_path(#cash_transaction), method: :post %>
Will submit a POST request with no parameters to the /cash_transactions/withdrawals#create (because you've given it no parameters to post). It doesn't know to include the params from the previous request.
There are a few options to fix this... you can add params as URL parameters in link_to like this, however I wouldn't recommend posting with params in the URL.
You can use button_to instead, and pass in the cash_transaction arguments from the previous request in the params: option (or pull them out of the unsaved #cash_transaction object).
Approach #1 - reuse create params
# Get them from the params sent in the previous request. In the controller...
def create
#cash_transaction = CashTransaction.create!(cash_transaction_params)
# etc...
end
#...
protected
def cash_transaction_params
params[:cash_transaction].permit(:amount, :whatever)
end
helper_method :cash_transaction_params
# In the view
<%= button_to 'Confirm', {action: 'create', params: cash_transaction_params}
Approach #2 - Access attributes from the model you built
<%= button_to 'Confirm', {action: 'create', params: #cash_transaction.attributes.slice('amount', 'other_attribute') }
Or you could do something like render the form again but hidden and have the "confirm" button submit the hidden form (with { action: :create } instead of { action: :confirm}). This last solution is probably the easiest to understand.

Rails Call Custom Controller Action from Custom Form

In a Rails project, I have the following controller action for the controller exchanges.rb:
def update_ordid
# Get the active exchange
#exchange = Exchange.find(params[:id])
# Decide which order ID field to update
active_order_field = params[:ordfld]
# Save the order ID
order_id = params[:ordid]
if active_order_field == 1 then
#exchange.order_id_1 = order_id
else
#exchange.order_id_2 = order_id
end
#active_exchange.save
respond_with(#exchange)
end
I've set up a route to this controller action:
resources :exchanges do
collection do
get 'update_ordid'
end
end
I want to call this action that accepts an order ID from a form on an exchanges show.html.erb page. I need to pass three values:
The ID of the current exchange, such as the integer in this example URL localhost:3000/exchanges/2 (This is the page the form is on)
The order ID as input from a text-field
Which of the two possible exchange fields the action should update
Next I need to create a custom form which will pass these values as parameters to the action. I haven't been able to find a good tutorial on how to do this yet, but my first thought was to set up the following:
<%= form_for(#exchange) do |f| %>
<div class="field">
<%= f.label :ordid, "Order ID" %><br>
<%= f.text_field :ordid, class: "form-control" %>
</div>
<% if #isrequestor == true %>
<%f.hidden_field :ordfld, :value => "1" %>
<% else %>
<%f.hidden_field :ordfld, :value => "2" %>
<% end %>
<div class="actions">
<%= f.submit "Submit", class: "btn btn-primary" %>
</div>
<% end %>
This gives me a NoMethodError stating the method 'ordid' is undefined. I'm guessing I need to modify the first line of code to associate the form with the custom action I've set up, but have no idea how to do so properly.
Yah, I got your point. So you wanted the following thing:
You wrote an custom action
You wanted to submit a form that action
You have registered your action in the router.
So let me answer the following solutions and find some mistakes you made in your code.
# in route.rb
resources :exchanges do
patch :update_ordid, on: :member # this is the best practice I would say,
#when you are trying to modify an existing record. So this action will only
#be reached with patch http methods
# on :member action an parameter id is required.
end
now if you generate your routes by running:
bundle exec rake routes
you will see a path like:
update_ordid_exchange /exchange/:id/update_ordid # :id parameter for exchange record
in your form set the url:
<%= form_for(#exchange, url: update_ordid_exchange_path) do |f| %>
or
<%= form_for(#exchange, url: url_for(controller: :exchange, action: update_ordid)) do |f| %>
Now then you will this form can submit this values within the parameter in your desire field.
So let me summarize things up here:
1. Setup your route properly
2. Check the url based on your route by generating rake routes command as shown above
3. Set the proper url and check if http method is correctly define in your form helper. For member actions, form helper by default use patch as http method. you just have to set the url.
Hope you understand my flow.

Rails - Multiple forms, different Models (Objects), one submit button

I have a view with 3 forms, Schedules, Workouts and Exercises, all behaving like an edit form, each. And one submit(save) button in the all the view.
When I click on the save button. Every data changed on those forms should be updated after click.
What is the best solution for this ? Javascript updating each data separated ? How to do that ? Is there a more Rails way to do this easily ?
My difficulty is how to integrated all those models in one view, while all this is happening in the show(view) from the Student model.
If you're implementing something like a profile / edit page (where you can save all the records at once), the two ways I would look at would either be to save the forms via Ajax, or use a single submit method to handle them
Ajax
The ajax method would be the most conventional:
Every form you submit will go to the form's own update method in the backend
Each form could be handled by a single button, but it's best to split them up
#app/controllers/profile_controller.rb
def edit
#schedules = Schedule.all #-> not sure how many records you're using
#workouts = Workout.all
#exercises = Exercise.all
end
#app/views/profile/edit.html.erb
<%= form_for #schedule do |f| %>
<%= f.text_field :test %>
<% end %>
# -> other forms
<%= button_to "Save", "#", id: "save" %>
#app/assets/javascripts/application.js
$("#save").on("click", function() {
$("form").submit(); // we'll have to define the form to submit
});
Single
If you submit all the forms as one, you'll have to encase them all in a single form, as sending different errors. This could be achieved by using _, and handled in the backend by looping through the different params, saving each one individually.
I'd do this:
#app/controllers/application_controller.rb
def submit
types = %w(schedules exercises workouts)
for type in types do
type.constantize.update_attributes()
end
end
This allows you to create a form with the different data types submitted in the same action:
#app/views/profile/edit.html.erb
<%= form_tag profile_submit_path do %>
<%= fields_for #schedules do |f| %>
<%= f.text_field :title %>
<% end %>
# -> fields_for for the other objects
<% end %>
This will allow you to send the updated objects to your controller, allowing them to submit
If all of your models (Schedules, Workouts and Exercises) are associated, using fields_for should be a good option.
From the above link:
<%= form_for #person do |person_form| %>
First name: <%= person_form.text_field :first_name %>
Last name : <%= person_form.text_field :last_name %>
<%= fields_for :permission, #person.permission do |permission_fields| %>
Admin? : <%= permission_fields.check_box :admin %>
<% end %>
<%= f.submit %>
<% end %>
Read the guides.
You could have some simple javascript that iterates over all form tags and submits each of them.
Alternatively, if you are going to use javascript anyways, you could follow an AJAXish auto-save approach upon changing any field.
But I think it might be cleaner if you just had one form for multiple models, using fields_for.

edit form submitting to the wrong url and remote: true failing to be picked-up

This has been driving me nuts because it doesnt seem to make any sense.
I want to do something relatively simple.
Display an edit form in a modal on the index page.
I have the following code looping through a collection of sites
<%= render(#sites) %>
<%= will_paginate #sites %>
Within the sites partial i have the following form hidden away
<%= simple_form_for site, remote: true do |f| %>
<%= f.input :name %>
<%= f.input :matter %>
<%= f.submit "Save", :class => "button gr thirt", id: "site_save" %>
<% end %>
instead of generating the expected HTML i get the following, linking to the show action, am I missing something fundamental here?
<form accept-charset="UTF-8" action="/sites/1" class="simple_form edit_site" data-remote="true" method="post" novalidate="novalidate">
</form>
I was looping through a collection of #sites, a results returned by a call to Site.all
so the object being served to the above form is one of the |site|'s contained within #sites
If you serve a form_for form with a an object retrieved from the database or a 'new record' object like Site.new, it will automatically differentiate and modify the route etc accordingly between the create and the update action.
The site object contained in the #sites block was not recognizable by the form_for. So a quick re factor to request an edit from via ajax, and provide the form with the instance variable created by the edit action (#site = Site.find(params[:id]) ) was recognizable by the form_for helper and meant that the submit action, accordingly adjusted to the correct route.

Rails: Two Different Submit buttons in a form

I'm trying to create a simple form with two different submit buttons: one which will do a normal submit, and one which will do an ajax submit and render a partial. But I'm not sure how to do this because both go towards the same create action. I tried something like this:
/views/layouts/_form.html.erb:
<div id="theform">
<%= form_for(#user, :remote => true, :form_to_validate => 'user') do |f| %>
Name: <div id='name'><%= f.text_field :name %></div><br/>
Email: <div id='email'><%= f.text_field :email %></div><br/>
Phone Number: <div id='phone_number'><%= f.text_field :phone_number%></div><br/>
<%= f.submit "Normal Submit", name:'normal' %>
<%= f.submit "Ajax Submit" %>
<% end %>
</div>
app/controllers/user_controller.rb:
class UsersController < ApplicationController
def new
#user = User.new
end
def create
#user = User.new(params[:user])
if params[:normal]
render :partial => "layouts/user"
end
end
EDIT: this may seem like an odd task but it was an assignment given to me to demonstrate I could do it both ways. I know how to do the AJAX submit and the normal submit separately but my confusion is with having two submits in the form! :)
Why not write some JS that listens to the click or submit and you route it in JS if its ajax $.ajax to the ajax location else let it go through normally if its not and dont stop the propagation.
I don't think you need two submit buttons. Have the ajax button simply call the $.ajax method and send your data.
Alternately, you could have the ajax button call $('#formid').submit() after converting the form to be ajax, using whatever method you use to do so. This is probably the easier of the two methods.

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