fix: Do not send invoice if amount < minimum (#7472)

Author: iamareebjamal

app/models/event_invoice.py

@@ -22,6 +22,7 @@
 
 class EventInvoice(SoftDeletionModel):
     DUE_DATE_DAYS = 30
+    MIN_AMOUNT = 2  # Minimum amount for which the invoice will be generated
 
     __tablename__ = 'event_invoices'
 
@@ -128,6 +129,14 @@ def generate_pdf(self, force=False):
                     self.event,
                 )
                 return
+            if not force and self.amount < EventInvoice.MIN_AMOUNT:
+                logger.warning(
+                    'Invoice amount of Event %s is %f which is less than %f, hence skipping generation',
+                    self.event,
+                    self.amount,
+                    EventInvoice.MIN_AMOUNT,
+                )
+                return
             net_revenue = round_money(gross_revenue - invoice_amount)
             orders_query = self.event.get_orders_query(
                 start=latest_invoice_date, end=self.issued_at