Ruby on Rails param is missing or the value is empty without using a model - ruby-on-rails

Question

In my contact.html, I have this code
<div class="form">
<form name="email-form" method="POST">
<label class="field-label" for="name">Name:</label>
<input class="w-input text-field-2" id="name" type="text" name="name" data-name="Name" required="required">
<label class="field-label" for="Email">Email:</label>
<input class="w-input text-field-2" id="email" type="email" name="email" data-name="Email" required="required">
<label class="field-label" for="Subject">Subject:</label>
<input class="w-input text-field-2" id="subject" type="text" name="subject" data-name="Subject">
<label class="field-label" for="Content">Text Message:</label>
<textarea class="w-input text-field-2 area" id="content" name="content" data-name="Text Area" required="required"></textarea>
<div>
<input class="w-button button" type="submit" value="Submit Message" data-wait="Please wait...">
</div>
</form>
</div>
This is under my controller
def contact
end
def send_mail
MessageMailer.new_message(contact_params).deliver
redirect_to contact_path, notice: 'Your messages has been sent.'
end
private
def contact_params
params.require(:contact).permit(:name, :email, :subject, :content)
end
under mailers/message_mailer.rb
class MessageMailer < ActionMailer::Base
default from: "sys.questdentalusa#gmail.com"
default to: "questdentalusa#gmail.com"
def new_message(contact)
#contact = contact
mail subject: #contact.subject
end
end
and under my new_message.text.erb is this code
Name: <%= #contact.name %>
Email: <%= #contact.email %>
Message: <%= #contact.content %>
I am to send an email consisting user's name, email and message which is inputed and NOT saved in the database. When I pass the four parameters like this
def send_mail
MessageMailer.new_message(:name, :email, :subject, :content).deliver
redirect_to contact_path, notice: 'Your messages has been sent.'
end
it worked just fine but i was told to use only one parameter, seems like group the four parameters: name, email, subject, content as one (contact)
When I typed the info and hit the submit button, I get this error message
param is missing or the value is empty: contact
I presume that what caused this error is because my def contact is empty. So I added contact.new and #contact=contact.new and MessageMailer.new but this error occurs NoMethodError
How can I possibly fix this? What should I write under my def contact ?

Answer 1

Your controller code is correct. You don't need Contact.new or something. The problem is with your <form>. What ends up in params depends on your form and in your form you don't have contact.
Instead of:
<input type="text" name="subject">
You have to do something like this:
<input type="text" name="contact[subject]">
And that for all the fields on your contact form.
Another option would be to use Rails' form helpers.

Answer 2

contact[] is missing in your form, see below correct one:
<div class="form">
<form name="email-form" method="POST">
<label class="field-label" for="name">Name:</label>
<input class="w-input text-field-2" id="name" type="text" name="contact[name]" data-name="Name" required="required">
<label class="field-label" for="Email">Email:</label>
<input class="w-input text-field-2" id="email" type="email" name="contact[email]" data-name="Email" required="required">
<label class="field-label" for="Subject">Subject:</label>
<input class="w-input text-field-2" id="subject" type="text" name="contact[subject]" data-name="Subject">
<label class="field-label" for="Content">Text Message:</label>
<textarea class="w-input text-field-2 area" id="content" name="contact[content]" data-name="Text Area" required="required"></textarea>
<div>
<input class="w-button button" type="submit" value="Submit Message" data-wait="Please wait...">
</div>
</form>
</div>