diff --git a/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/AccountTransaction.kt b/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/AccountTransaction.kt
index 555e25de..9182dac1 100644
--- a/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/AccountTransaction.kt
+++ b/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/AccountTransaction.kt
@@ -54,17 +54,24 @@ open class AccountTransaction(
     }
 
 
+    // for object deserializers
+    internal constructor() : this(BankAccount(), null, "", BigDecimal.Zero, Date(), null)
+
+    /*      convenience constructors for languages not supporting default values        */
+
+    constructor(bankAccount: BankAccount, otherPartyName: String?, unparsedUsage: String, amount: BigDecimal, valueDate: Date, bookingText: String?)
+            : this(bankAccount, amount, "EUR", unparsedUsage, valueDate,
+        otherPartyName, null, null, bookingText, valueDate)
+
+
     constructor(bankAccount: BankAccount, amount: BigDecimal, currency: String, unparsedUsage: String, bookingDate: Date,
                 otherPartyName: String?, otherPartyBankCode: String?, otherPartyAccountId: String?,
                 bookingText: String?, valueDate: Date)
             : this(bankAccount, amount, currency, unparsedUsage, bookingDate,
-                    otherPartyName, otherPartyBankCode, otherPartyAccountId, bookingText, valueDate,
-    0, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, "", "", null, null, "", null)
+        otherPartyName, otherPartyBankCode, otherPartyAccountId, bookingText, valueDate,
+        0, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, "", "", null, null, "", null)
+
 
-    // for object deserializers
-    internal constructor() : this(BankAccount(), BigDecimal.Zero, "","", Date(), null, null, null, null, Date(), 0, null, BigDecimal.Zero, BigDecimal.Zero,
-    null, null, null, null, null, null, null, null, null, null, null, null, null,
-    null, "", "", null, null, "", null)
 
     open var id: String = "${bankAccount.id} ${IdDateFormat.format(bookingDate)} ${IdDateFormat.format(valueDate)} $amount $currency $unparsedUsage $otherPartyName $otherPartyBankCode $otherPartyAccountId"
 
diff --git a/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/BankAccount.kt b/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/BankAccount.kt
index 560065ac..1c0c31a0 100644
--- a/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/BankAccount.kt
+++ b/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/BankAccount.kt
@@ -29,7 +29,14 @@ open class BankAccount @JvmOverloads constructor(
     bookedAccountTransactions: List<AccountTransaction> = listOf()
 ) {
 
-    internal constructor() : this(Customer(), "", "", null, null, "") // for object deserializers
+    internal constructor() : this(Customer(), null, "") // for object deserializers
+
+    /*      convenience constructors for languages not supporting default values        */
+
+    constructor(customer: Customer, productName: String?, identifier: String) : this(customer, productName, identifier, BankAccountType.Girokonto)
+
+    constructor(customer: Customer, productName: String?, identifier: String, type: BankAccountType = BankAccountType.Girokonto, balance: BigDecimal = BigDecimal.Zero)
+            : this(customer, identifier, "", null, null, "", balance, "EUR", type, productName)
 
 
     open var id: String = UUID.random()
diff --git a/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/Customer.kt b/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/Customer.kt
index d77a96fb..1302007b 100644
--- a/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/Customer.kt
+++ b/ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/ui/model/Customer.kt
@@ -27,6 +27,11 @@ open class Customer(
 
     internal constructor() : this("", "", "", "", "", "", "") // for object deserializers
 
+    /*      convenience constructors for languages not supporting default values        */
+
+    constructor(bankCode: String, customerId: String, password: String, finTsServerAddress: String)
+            : this(bankCode, customerId, password, finTsServerAddress, "", "", "")
+
 
     var id: String = UUID.random()
 
diff --git a/ui/BankingiOSApp/BankingiOSApp/Preview Content/PreviewData.swift b/ui/BankingiOSApp/BankingiOSApp/Preview Content/PreviewData.swift
index ae211619..f43d8ef6 100644
--- a/ui/BankingiOSApp/BankingiOSApp/Preview Content/PreviewData.swift	
+++ b/ui/BankingiOSApp/BankingiOSApp/Preview Content/PreviewData.swift	
@@ -5,19 +5,20 @@ import BankingUiSwift
 let previewBanks = createPreviewBanks()
 
 func createPreviewBanks() -> [BUCCustomer] {
-    let bank1 = BUCCustomer(bankCode: "", customerId: "", password: "", finTsServerAddress: "", bankName: "Abzockbank", bic: "", customerName: "", userId: "", iconUrl: "", accounts: [])
+    let bank1 = BUCCustomer(bankCode: "", customerId: "", password: "", finTsServerAddress: "", bankName: "Abzockbank", bic: "", customerName: "Marieke Musterfrau", userId: "", iconUrl: "", accounts: [])
     
     bank1.accounts = [
-        BUCBankAccount(customer: bank1, identifier: "id", accountHolderName: "Marieke Musterfrau", iban: nil, subAccountNumber: nil, customerId: "", balance: CommonBigDecimal(double: 17.0), currency: "EUR", type: .girokonto, productName: "Girokonto", accountLimit: nil, lastRetrievedTransactionsTimestamp: nil, supportsRetrievingAccountTransactions: true, supportsRetrievingBalance: true, supportsTransferringMoney: true, supportsInstantPaymentMoneyTransfer: true, bookedAccountTransactions: []),
+        BUCBankAccount(customer: bank1, productName: "Girokonto", identifier: "1234567890"),
         
-        BUCBankAccount(customer: bank1, identifier: "id", accountHolderName: "Marieke Musterfrau", iban: nil, subAccountNumber: nil, customerId: "", balance: CommonBigDecimal(double: 17.0), currency: "EUR", type: .festgeldkonto, productName: "Tagesgeld Minus", accountLimit: nil, lastRetrievedTransactionsTimestamp: nil, supportsRetrievingAccountTransactions: true, supportsRetrievingBalance: true, supportsTransferringMoney: true, supportsInstantPaymentMoneyTransfer: true, bookedAccountTransactions: [])
+        BUCBankAccount(customer: bank1, productName: "Tagesgeld Minus", identifier: "0987654321")
     ]
     
-    let bank2 = BUCCustomer(bankCode: "", customerId: "", password: "", finTsServerAddress: "", bankName: "Kundenverarschebank", bic: "", customerName: "", userId: "", iconUrl: "", accounts: [])
+    
+    let bank2 = BUCCustomer(bankCode: "", customerId: "", password: "", finTsServerAddress: "", bankName: "Kundenverarschebank", bic: "", customerName: "Marieke Musterfrau", userId: "", iconUrl: "", accounts: [])
     
     bank2.accounts = [
-        BUCBankAccount(customer: bank1, identifier: "id", accountHolderName: "Marieke Musterfrau", iban: nil, subAccountNumber: nil, customerId: "", balance: CommonBigDecimal(double: 17.0), currency: "EUR", type: .girokonto, productName: "Girokonto", accountLimit: nil, lastRetrievedTransactionsTimestamp: nil, supportsRetrievingAccountTransactions: true, supportsRetrievingBalance: true, supportsTransferringMoney: true, supportsInstantPaymentMoneyTransfer: true, bookedAccountTransactions: [])
+        BUCBankAccount(customer: bank2, productName: "Girokonto", identifier: "1234567890")
     ]
     
     return [ bank1, bank2 ]
-}
\ No newline at end of file
+}