moving insert to another model and done so in database internal

internal/model/portifolio.go

@@ -36,7 +36,7 @@ type Trade struct {
 	Product  TradeProduct
 	Type     TradeType
 	Price    float64
-	Currency Currency
+	Currency string
 	Date     time.Time
 }
 

internal/model/revenue.go

@@ -31,3 +31,13 @@ type Revenue struct {
 	Period   *Period
 	Value    float64
 }
+
+// made to be inserted to database
+type RevenueInsert struct {
+	CompanyID    int
+	CurrencyID   int
+	CategoryName string
+	ParentID     int
+	Period       Period
+	Value        float64
+}