diff --git a/models/common/pricing/pricing_strategy.go b/models/common/pricing/pricing_strategy.go
index fee356f..728e794 100755
--- a/models/common/pricing/pricing_strategy.go
+++ b/models/common/pricing/pricing_strategy.go
@@ -93,6 +93,10 @@ func (t TimePricingStrategy) String() string {
 	return [...]string{"ONCE", "PER SECOND", "PER MINUTE", "PER HOUR", "PER DAY", "PER WEEK", "PER MONTH"}[t]
 }
 
+func TimePricingStrategyListStr() []string {
+	return []string{"ONCE", "PER SECOND", "PER MINUTE", "PER HOUR", "PER DAY", "PER WEEK", "PER MONTH"}
+}
+
 func TimePricingStrategyList() []TimePricingStrategy {
 	return []TimePricingStrategy{ONCE, PER_SECOND, PER_MINUTE, PER_HOUR, PER_DAY, PER_WEEK, PER_MONTH}
 }
diff --git a/models/resources/data.go b/models/resources/data.go
index aecf190..9a26a20 100755
--- a/models/resources/data.go
+++ b/models/resources/data.go
@@ -89,7 +89,9 @@ const (
 )
 
 func (t DataResourcePricingStrategy) String() string {
-	return [...]string{"PER DOWNLOAD", "PER TB DOWNLOADED", "PER GB DOWNLOADED", "PER MB DOWNLOADED", "PER KB DOWNLOADED"}[t]
+	l := pricing.TimePricingStrategyListStr()
+	l = append(l, []string{"PER DOWNLOAD", "PER TB DOWNLOADED", "PER GB DOWNLOADED", "PER MB DOWNLOADED", "PER KB DOWNLOADED"}...)
+	return l[t]
 }
 
 func DataResourcePricingStrategyList() []DataResourcePricingStrategy {
@@ -101,7 +103,9 @@ func ToDataResourcePricingStrategy(i int) DataResourcePricingStrategy {
 }
 
 func (t DataResourcePricingStrategy) GetStrategy() string {
-	return [...]string{"PER_DOWNLOAD", "PER_GB", "PER_MB", "PER_KB"}[t]
+	l := pricing.TimePricingStrategyListStr()
+	l = append(l, []string{"PER DATA STORED", "PER TB STORED", "PER GB STORED", "PER MB STORED", "PER KB STORED"}...)
+	return l[t]
 }
 
 func (t DataResourcePricingStrategy) GetStrategyValue() int {
diff --git a/models/resources/storage.go b/models/resources/storage.go
index a1198ca..77a04c1 100755
--- a/models/resources/storage.go
+++ b/models/resources/storage.go
@@ -115,11 +115,15 @@ func StorageResourcePricingStrategyList() []StorageResourcePricingStrategy {
 }
 
 func (t StorageResourcePricingStrategy) String() string {
-	return [...]string{"PER DATA STORED", "PER TB STORED", "PER GB STORED", "PER MB STORED", "PER KB STORED"}[t]
+	l := pricing.TimePricingStrategyListStr()
+	l = append(l, []string{"PER DATA STORED", "PER TB STORED", "PER GB STORED", "PER MB STORED", "PER KB STORED"}...)
+	return l[t]
 }
 
 func (t StorageResourcePricingStrategy) GetStrategy() string {
-	return [...]string{"PER_DATA_STORED", "PER_GB_STORED", "PER_MB_STORED", "PER_KB_STORED"}[t]
+	l := pricing.TimePricingStrategyListStr()
+	l = append(l, []string{"PER DATA STORED", "PER TB STORED", "PER GB STORED", "PER MB STORED", "PER KB STORED"}...)
+	return l[t]
 }
 
 func (t StorageResourcePricingStrategy) GetStrategyValue() int {