Price Recurring interval_count required when interval set (#65)

docs/resources/stripe_price.md

@@ -135,7 +135,7 @@ Arguments accepted by this resource include:
   Allowed values are `sum` for summing up all usage during a period, `last_during_period` for using the last usage
   record reported within a period, `last_ever` for using the last usage record ever (across period bounds) or `max`
   which uses the usage record with the maximum reported usage during a period.
-* `interval_count` - (Optional) Int. The number of intervals between subscription billings. For
+* `interval_count` - (Optional) Int. This parameter is (Required) when interval value is set. The number of intervals between subscription billings. For
   example, `interval=month` and `interval_count=3` bills every 3 months. Maximum of one year interval allowed (1 year,
   12 months, or 52 weeks).
 * `usage_type` - (Optional) String. Configures how the quantity per period should be determined. Can be either `metered`

stripe/resource_stripe_price.go

@@ -500,14 +500,16 @@ func resourceStripePriceCreate(ctx context.Context, d *schema.ResourceData, m in
 	}
 	if recurring, set := d.GetOk("recurring"); set {
 		params.Recurring = &stripe.PriceRecurringParams{}
-		for k, v := range ToMap(recurring) {
+		recurringMap := ToMap(recurring)
+		for k, v := range recurringMap {
 			switch {
 			case k == "interval" && ToString(v) != "":
 				params.Recurring.Interval = stripe.String(ToString(v))
+			case k == "interval_count" && ToString(recurringMap["interval"]) != "":
+				params.Recurring.IntervalCount = stripe.Int64(ToInt64(v))
 			case k == "aggregate_usage" && ToString(v) != "":
 				params.Recurring.AggregateUsage = stripe.String(ToString(v))
-			case k == "interval_count" && ToInt64(v) != 0:
-				params.Recurring.IntervalCount = stripe.Int64(ToInt64(v))
+
 			case k == "usage_type" && ToString(v) != "":
 				params.Recurring.UsageType = stripe.String(ToString(v))
 			}