I'm using stripe element and when I create a payment intention it works for me if there is a plan with a certain price

But when the plan is zero $0 it does not recognize payment_intent or the client_secret

# Here I created an object of type subscription incompletely (@subscription)
# In such a way that the user can enter their credit card and with the help of 
# @subscriptions confirm if everything is fine in checkout.html.erb

def checkout
    @subscription = Stripe::Subscription.create(
      customer: current_user.stripe_customer_id, # stripe customer_id for suscription 
      items: [{
        price: params[:price] # attached price of suscription plans
      }],
      payment_behavior: 'default_incomplete', # PaymentIntent with status=incomplete
      expand: ['latest_invoice.payment_intent'] # return the payment_intent data
    )
end


# checkout.html.erb
<form id="payment-form">
  <div >
    <label for="card-element">
      <!-- Debit/credit card -->
    </label>

    <div id="card-element">
      <!-- a Stripe Element will be inserted here -->
    </div>

    <!-- Used to display Elements errors -->
    <div id="card-errors" role="alert"></div>
  </div>

  <button id="submit">Submit Payment</button>
</form>

<script>
   // Initialize stripe elements
   var stripe = Stripe("<%= ENV['STRIPE_PUBLISHABLE_KEY'] %>");
   var elements = stripe.elements();
   var cardElement = elements.create('card');
   cardElement.mount('#card-element');

   var formElement = document.getElementById('payment-form');

   formElement.addEventListener('submit', function(event) {
     event.preventDefault();

  # here I create the payment intention but when the plan has a subscription of $ 0 
  # it 
  # does not recognize me neither the field client_secret nor the payment_intent

  stripe.confirmCardPayment("<%= 
     @subscription.latest_invoice.payment_intent.client_secret %>", {
    payment_method: { card: cardElement }
     }).then(function(result) {
    if (result.error) {
      console.log(result.error.message);
      window.location.reload();
    } else {
      window.location.href = "/" ;
    }
  });
});   

I do not know if it has explained me well, what I would like is to create a monthly subscription with $ 0 as I have been doing with plans of other prices

Any help is welcome, thank you very much for reading me

CodePudding user response：

From the Stripe PaymentIntent docs

The minimum amount is $0.50 US or equivalent in charge currency.

You can create subscriptions with free trials but I don't think it will work if the billed amount is $0, due to the payment intent restriction mentioned above.