rails amp form error request and response access-control-allow-origin - ruby-on-rails

Question

i'm using rails amp and setting my amp route for contact form
<form id='contactusform' method="POST" class="p2" action-xhr = "<%= addquery_path %>" custom-validation-reporting="as-you-go" target="_top">
<%= hidden_field_tag :authenticity_token, form_authenticity_token -%>
<div class="form-row">
<div class="inline-form">
<label class="inline-label">
<input type="text" id="as-you-go-name" pattern="p{L}+\s\p{L}+" class="inline-label-input input-item" name='name' value="" required />
<span class="inline-label-label">Name</span>
</label>
<div class="validation-blk">
<span visible-when-invalid="valueMissing" validation-for="as-you-go-name">Please enter your first name</span>
<span visible-when-invalid="patternMismatch" validation-for="as-you-go-name">Please enter characters only</span>
</div>
</div>
</div>
<div class="form-row">
<div class="inline-form">
<label class="inline-label">
<input type="email" id="as-you-go-email" class="inline-label-input input-item" value="" name='email' required />
<span class="inline-label-label">Email</span>
</label>
<span visible-when-invalid="valueMissing" validation-for="as-you-go-email">Please enter your email address</span>
<span visible-when-invalid="typeMismatch" validation-for="as-you-go-email"></span>
</div>
</div>
<div class="form-row">
<div class="inline-form">
<label class="inline-label">
<input type="number" id="phone-number" name='phone' class="inline-label-input input-item" value="" required />
<span class="inline-label-label">contatct number</span>
</label>
<span visible-when-invalid="valueMissing" validation-for="phone-number">Please enter your phone number</span>
</div>
</div>
<div class="form-row">
<div class="inline-form">
<label class="inline-label">
<input type="text" id="Cityname" name='city' pattern="\w+\s\w+" class="inline-label-input input-item" value="" required />
<span class="inline-label-label">City</span>
</label>
<span visible-when-invalid="valueMissing" validation-for="Cityname">Please enter your City</span>
</div>
</div>
<div class="form-row">
<div class="inline-form">
<label class="inline-label">
<input type="text" id="Statename" pattern="\w+\s\w+" class="inline-label-input input-item" name='state 'value="" required />
<span class="inline-label-label">State</span>
</label>
<span visible-when-invalid="valueMissing" validation-for="Statename">Please enter your State</span>
</div>
</div>
<div class="form-row">
<div class="inline-form">
<label class="inline-label">
<input type="text" id="Country" pattern="\w+\s\w+" class="inline-label-input input-item" name='country' value="" required />
<span class="inline-label-label">Country</span>
</label>
<span visible-when-invalid="valueMissing" validation-for="Country">Please enter your Country</span>
</div>
</div>
<div class="form-row">
<div class="inline-form selectionbox">
<label class="inline-label">
<select class="select-box custom-select" required name="eventtype"
id="eventtype">
<option value="">QUERY TYPE</option>
<% #app_config.event_type.split('|').each do |event_name,index| %>
<option value="<%= event_name %>"><%= event_name %></option>
<% end %>
</select>
</label>
<span visible-when-invalid="valueMissing" validation-for="eventtype">selectoption message appears like this</span>
</div>
</div>
<div class="form-row">
<div class="ampstart-input inline-block relative">
<textarea name="message" id="message" class="block" rows="5" cols="50" required placeholder="your message"></textarea>
<!-- <label class="textarea-ab" aria-hidden="true">
Your message
</label> -->
<span visible-when-invalid="valueMissing" validation-for="message"></span>
</div>
</div>
<div class="button button-common">
<input type="submit" value="OK" class="ampstart-btn caps">
</div>
<!-- social icons -->
<div submit-success>
<template type="amp-mustache">
Subscription successful!
</template>
</div>
<div submit-error>
<template type="amp-mustache">
Subscription failed!
</template>
</div>
</form>
And my controller saves the form in my database, but the browser throws an error.
def addquery
#contact = Lead.new
#contact.name = params[:name]
#contact.email = params[:email]
#contact.phone = params[:phone]
#contact.city = params[:city]
#contact.state = params[:state]
#contact.country = params[:country]
#contact.enquiry_type = params[:eventtype]
#contact.message = params[:message]
#contact.save
end
when i try to submit my AMP form it showing
amp form error request must have access-control-allow-origin
in my browser console.
as well as the
response must have access-control-allow-origin

Answer 1

Set access-control-allow-origin: <your domain> as a response header in the form handler in rails.
Example, if you are running on localhost set form response header as access-control-allow-origin: http://localhost:3000