I have in rails the following form in a view
<%= form_for (#account) do |f| %>
<%= f.label :comments,"Comments" %>
<%=f.text_area :comments %>
<%= f.submit "Confirm",:name=>"conf" %>
<%= f.submit "Reject" %>
<% end %>
When I submit the form I get the following hash in the log before the update of the database
Started PATCH "/accounts/12" for 127.0.0.1 at 2015-08-13 21:31:18 +0200
Processing by UseractionsController#answer_with_comments as HTML
Parameters: {"utf8"=>"✓", "account"=>{"comments"=>"mycomments"}, "conf"=>"Confirm", "id"=>"12"}
I am trying to access the input in the comments text area in the controller. I tried
params[:account][:comments]
but it does not seem to work. Could anyone give me the appropriate syntax? Thanks.
EDIT
This is my controller code. Right now the if loop return false and nothing is added to the database even though there is something submitted ("mycomments" see above in the param nested hash)
if params[:bankaccount][:comments]
#bankaccount.update_attribute(:comments, params[:bankaccount][:comments])
end
It is only the appropriate syntax for your view. It assumes that you have content field on your Comment model.
<%= form_for (#account) do |f| %>
<%= f.label :comments,"Comments" %>
<%= f.fields_for :comments do |ff| %>
<%= ff.text_field :content %>
<% end %>
<%= f.submit "Confirm",:name=>"conf" %>
<%= f.submit "Reject" %>
<% end %>
You also will have to declare nested attributes in your Account model and your params hash should be different.
You should watch these two Railscasts part 1 and part 2 to learn more about nested attributes.
Since you mention strong parameters as a tag you probably want to build this a bit differently.
private
def account_params
#the permit method might need to be altered depending on your model and view
params.require(:account).permit(:comments)
end
Somewhere else in your controller you would then do:
#bankaccount.update_attributes(account_params)
Please take a read: http://edgeguides.rubyonrails.org/action_controller_overview.html#strong-parameters
Related
How would I go about creating a form that takes what user input as a value and just passes it to the controller without being connected to any model?
Something simple like i.e. calculating tax based on input salary, or other calculation like that, when I show the user a form, let them fill it, and when submitting it would go to the results
<%= form_with url: 'calculator#result' do |form| %>
<%= form.number_field :value, in: 1000.0..20000.0, step: 0.5 %>
<%= form.submit %>
<% end %>
i expected something like this to pass 'value' and redirect to calculator#result when submitting, but the button doesn't really do anything. whereas a form connected to a model seems pretty smart and does it
The form_tag Helper method is usually used for forms that are not linked to a model.
I think this should work:
<%= form_tag("/calculator/result", :method => "get") do %>
<%= label_tag(:value, "Value:") %>
<%= text_field_tag(:value) %>
<%= submit_tag("Submit") %>
<% end %>
In my Rails 6 app, I have a Product and Order model.
On my products#show page, I have some fields and a button. What I need to do is send the info to the orders#new page so that this data is shown on the orders#new page.
I have tried to write some code based on Pass variables without model associations in Rails and how to pass parameters in params using form_tag method in rails, but my code seems completely wrong.
on products#show:
<%= form_tag(new_order_path do |form| %>
<%= form.input_field :comments %>
<%= form.button %>
<% end %>
With this code I get undefined method text_field' for nil:NilClass`.
I have tried adding attr_accessor :comments to both the Product and Order model, but it doesn't help.
I don't think that my approach or what I am trying to code is right. I was just trying to piece together parts from these answers.
Can someone please help me figure out the best way I can pass this data to Orders#new to show in that view?
<%= form_with url: "/search", method: :get do |form| %>
<%= form.label :query, "Search for:" %>
<%= form.text_field :query %>
<%= form.submit "Search" %>
<% end %>
from the docs
https://guides.rubyonrails.org/form_helpers.html
and the show path also requires an id
I'm trying to offer teachers a form that will create multiple students at once. It seems that most people tackle this concept with nested attributes, but I'm having a hard time understanding how that would work when I'm only using a single model. This article made it seem possible to achieve this without nested attributes, but my results are not working the way the author suggests. The students array should include one hash for each section of the form. But when I submit the form and check the parameters, only one single hash exists in the array.
Adjusting her approach, I've got this controller:
students_controller.rb
def multi
#student_group = []
5.times do
#student_group << Student.new
end
end
(I'm using an action I've called "multi" because it's a different view than the regular "create" action, which only creates one student at a time. I've tried moving everything into the regular create action, but I get the same results.)
The view:
multi.html.erb
<%= form_tag students_path do %>
<% #student_group.each do |student| %>
<%= fields_for 'students[]', student do |s| %>
<div class="field">
<%= s.label :first_name %><br>
<%= s.text_field :first_name %>
</div>
<div class="field">
<%= s.label :last_name %><br>
<%= s.text_field :last_name %>
</div>
<% end %>
<% end %>
<div class="actions">
<%= submit_tag %>
</div>
<% end %>
The results:
(byebug) params
<ActionController::Parameters {"utf8"=>"✓", "authenticity_token"=>"3Xpi4XeqXuPs9jQvevy+nvGB1HiProddZzWq6Ed7Oljr3TR2fhx9Js6fN/F9xYcpgfDckCBOC2CoN+MrlFU0Bg==", "students"=>{"first_name"=>"fff", "last_name"=>"ggg"}, "commit"=>"Save changes", "controller"=>"students", "action"=>"create"} permitted: false>
Only one has is included for a student named "fff ggg". There should be four other hashes with different students.
Thank you in advance for any insight.
fields_for is only used in conjunction with form_for. The for is referring to a model, which it expects you to use. Since you're trying to build a form with no model, you have to construct your own input field names.
Don't use fields_for but instead, render each input using the form tag helpers e.g.
<%= label_tag "students__first_name", "First Name" %>
<%= text_field_tag "students[][first_name]" %>
...and so on.
The key is that the field names have that [] in them to indicate that the students parameters will be an array of hashes. You almost got it by telling fields_for to be called students[] but fields_for ignored it because it needs a model to work correctly.
I have an application that deals with user rotas - and I'm currently adding the ability for admin approvals. If the user updates their own rota the params hash looks something like:
Parameters: {id:1, role_id: 1, team_id:1, rota: [startDate: 01/01/2014, endDate:02/02/2014]}
and these are submitted using a form with:
<%= form_for [#team,#role,#rota] do |f| %>
form code
<% end %>
We need to access the attributes outside the rota: object but currently can't find a way to as:
params.require requires you to pass an object in.
My team members have decided to add hidden fields to submit the attributes within the rota object but that seems redundant seeing as they are quite clearly there, we just can't find a way to access them, and ideas?
I was talking about something like
def user_rota_params
params.require(:user)
.permit(:role_id, :team_id, :rota => [:startDate, :endDate])
end
Then, for your nested attributes you could use fields_for.
Your form, thus, should look something this (omitting labels and keeping it basic):
<%= form_for #user do |f| %>
<%= f.text_field :role_id %>
<%= f.text_field :team_id %>
<%= f.fields_for :rota do |ff| %>
<%= ff.date_field :startDate %>
<%= ff.date_field :endDate %>
<% end %>
<% end %>
I'm running Rails 4.1 and I have an edit form with some values in it, I don't mind other fields on the form being autopopulated from database values, Rails does that nicely. But I want to disable the autopopulation of one field. Is that possible?
I'm doing the standard Rails form_for, everything works I just do not want one of the fields to autopopulate. I do not want to set the value as blank or "" because it would overwrite the database.
Any suggestions?
edit.html.erb
<%= form_for #object do |f| %>
<% f.text_field :property %> #autopopulate from database
<% f.text_field :property2 %> # I do not want to autopopulate.
<% f.submit 'Submit %>
<% end %>
Clear the attribute before rendering a form.
Here's what it would look like in the view:
<% #object.property2.clear %> # set attribute to an empty string
<%= form_for #object do |f| %>
<% f.text_field :property %> #autopopulate from database
<% f.text_field :property2 %> # I do not want to autopopulate.
<% f.submit 'Submit %>
<% end %>
However, it is best done in the controller:
def edit
# ...
#object.property2.clear
end
Note that if you submit this form with a blank field, it will save a blank string in database, removing whatever was there before.