Adapt data to new MapTo feature

BlueWest.Api/Controllers/CountriesController.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Linq;
 using BlueWest.Data;
 using BlueWest.WebApi.MySQL;
@@ -6,6 +7,9 @@ using Microsoft.AspNetCore.Mvc;
 
 namespace BlueWest.WebApi.Controllers
 {
+/// <summary>
+/// Controller responsible to get country data
+/// </summary>
 [ApiController]
 [Route("[controller]")]
 public class CountriesController : ControllerBase
@@ -25,7 +29,7 @@ public class CountriesController : ControllerBase
     /// <summary>
     /// Add Country
     /// </summary>
-    /// <param name="country"></param>
+    /// <param name="countryToCreate">The country data to create</param>
     /// <returns>The newly created country</returns>
     /// /// <summary>
     /// Creates a Country.
@@ -44,11 +48,11 @@ public class CountriesController : ControllerBase
     /// <response code="201">Returns the newly created country</response>
     [ProducesResponseType(StatusCodes.Status201Created)]
     [HttpPost]
-    public ActionResult AddCountry(Country country)
+    public ActionResult AddCountry(CountryCreate countryToCreate)
     {
-        _dbContext.Countries.Add(country);
+        _dbContext.Countries.Add(new Country(countryToCreate, new List<Currency>()));
         _dbContext.SaveChanges();
-        return CreatedAtRoute(nameof(GetCountryById),  new {countryId = country.Code}, country);
+        return CreatedAtRoute(nameof(GetCountryById),  new {countryId = countryToCreate.Code}, countryToCreate);
     }
 
     /// <summary>

BlueWest.Api/Controllers/CurrenciesController.cs

@@ -7,6 +7,9 @@ using Microsoft.AspNetCore.Mvc;
 
 namespace BlueWest.WebApi.Controllers
 {
+    /// <summary>
+    /// The controller responsible to fetch currency data
+    /// </summary>
     [ApiController]
     [Route("[controller]")]
     public class CurrenciesController : ControllerBase
@@ -19,16 +22,27 @@ namespace BlueWest.WebApi.Controllers
         }
 
 
+        /// <summary>
+        /// Add Currency to the table of currencies
+        /// </summary>
+        /// <param name="currencyToCreate">Currency data to create</param>
+        /// <returns></returns>
         [ProducesResponseType(StatusCodes.Status201Created)]
         [HttpPost]
-        public ActionResult AddCurrency(CurrencyCreate currency)
+        public ActionResult AddCurrency(CurrencyCreate currencyToCreate)
         {
-            var newCurrency =  new Currency();
+            var newCurrency =  new Currency(currencyToCreate, new List<Country>());
             _dbContext.Currencies.Add(newCurrency);
             _dbContext.SaveChanges();
-            return CreatedAtRoute(nameof(GetCurrencyById), new {CurrencyId = currency.Code}, currency);
+            return CreatedAtRoute(nameof(GetCurrencyById), new {CurrencyId = currencyToCreate.Code}, currencyToCreate);
         }
 
+        /// <summary>
+        /// Update a currency data from the Currency table in the database
+        /// </summary>
+        /// <param name="currencyNumber">The currency number we want to update</param>
+        /// <param name="currencyToUpdate">Currency Data to update</param>
+        /// <returns></returns>
         [ProducesResponseType(StatusCodes.Status200OK)]
         [ProducesResponseType(StatusCodes.Status400BadRequest)]
         [HttpPut("{currencyNumber}")]
@@ -48,6 +62,11 @@ namespace BlueWest.WebApi.Controllers
         }
 
 
+        /// <summary>
+        ///  Gets a currency by the currency number (id)
+        /// </summary>
+        /// <param name="currencyId">The id of the currency to get</param>
+        /// <returns></returns>
         [ProducesResponseType(StatusCodes.Status200OK)]
         [ProducesResponseType(StatusCodes.Status404NotFound)]
         [HttpGet("{currencyId}", Name = nameof(GetCurrencyById))]

BlueWest.Data/Currency/Currency.cs

@@ -4,12 +4,14 @@ using MapTo;
 
 namespace BlueWest.Data
 {
-    [MapFrom(typeof(CurrencyUpdate))]
+    [MapFrom(new []{
+        typeof(CurrencyUpdate), 
+        typeof(CurrencyCreate)})]
 
     public partial class Currency
     {
-        [MaxLength(3)]public int Num { get; set; } // Primary key
+        [MaxLength(3)] public int Num { get; set; } // Primary key
-        [MaxLength(3)]public string Code { get; set; } 
+        [MaxLength(3)] public string Code { get; set; } 
         public List<Country> Countries { get; set; }
 
         public Currency()

BlueWest.Data/Currency/CurrencyUpdate.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
 using MapTo;
 
 namespace BlueWest.Data
@@ -8,7 +9,7 @@ namespace BlueWest.Data
     public partial class CurrencyUpdate
     {
         // ISO 4217 Code
-        public string Code { get; set; }         
+        [MaxLength(3)] public string Code { get; set; }         
         
         
     }

include/BlueWest.MapTo/src/BlueWest.MapTo/Extensions/CommonExtensions.cs

@@ -30,18 +30,22 @@ namespace MapTo.Extensions
 
         internal static SourceBuilder WriteModelInfo(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
+            foreach (var targetSourceType in model.MappedSourceTypes)
-            return builder
+            {
-                        .WriteLine()
+                builder
-                        .WriteComment($" IsTypeUpdatable                {model.IsTypeUpdatable}")
+                    .WriteLine()
-                        .WriteComment($" HasMappedBaseClass             {model.HasMappedBaseClass.ToString()}")
+                    .WriteComment($" IsTypeUpdatable                {model.IsTypeUpdatable}")
-                        .WriteComment($" Namespace                      {model.Namespace}")
+                    .WriteComment($" HasMappedBaseClass             {model.HasMappedBaseClass.ToString()}")
-                        .WriteComment($" Options                        {model.Options.ToString()}")
+                    .WriteComment($" Namespace                      {model.Namespace}")
-                        .WriteComment($" Type                           {model.Type}")
+                    .WriteComment($" Options                        {model.Options.ToString()}")
-                        .WriteComment($" TypeIdentifierName             {model.TypeIdentifierName}")
+                    .WriteComment($" Type                           {model.Type}")
-                        .WriteComment($" SourceNamespace                {targetSourceType.SourceNamespace}")
+                    .WriteComment($" TypeIdentifierName             {model.TypeIdentifierName}")
-                        .WriteComment($" SourceTypeFullName             {targetSourceType.SourceTypeFullName}")
+                    .WriteComment($" SourceNamespace                {targetSourceType.SourceNamespace}")
-                        .WriteComment($" SourceTypeIdentifierName       {targetSourceType.SourceTypeIdentifierName}");
+                    .WriteComment($" SourceTypeFullName             {targetSourceType.SourceTypeFullName}")
+                    .WriteComment($" SourceTypeIdentifierName       {targetSourceType.SourceTypeIdentifierName}");
+            }
+
+            return builder;
 
         }
 

include/BlueWest.MapTo/src/BlueWest.MapTo/Extensions/CommonSource.cs

@@ -15,7 +15,6 @@ namespace MapTo.Extensions
         {
             const bool writeDebugInfo = true;
 
-            var targetSourceType = model.MappedSourceTypes[0];
 
             using var builder = new SourceBuilder()
                 .WriteLine(GeneratedFilesHeader)
@@ -27,23 +26,30 @@ namespace MapTo.Extensions
                 .WriteLine($"namespace {model.Namespace}")
                 .WriteOpeningBracket();
             
-            if (writeDebugInfo)
+            
-                builder
+
-                    .WriteModelInfo(model)
+            foreach (var targetSourceType in model.MappedSourceTypes)
-                    .WriteLine()
+            {
-                    .WriteComment("Type properties")
+                if (writeDebugInfo)
-                    .WriteComment()
+                    builder
-                    .WriteMappedProperties(targetSourceType.TypeProperties)
+                        .WriteModelInfo(model)
-                    .WriteLine()
+                        .WriteLine()
-                    .WriteComment("Source properties")
+                        .WriteComment("Type properties")
-                    .WriteLine()
+                        .WriteComment()
-                    .WriteComment("Type fields")
+                        .WriteMappedProperties(targetSourceType.TypeProperties)
-                    .WriteComment()
+                        .WriteLine()
-                    .WriteMappedProperties(targetSourceType.TypeFields)
+                        .WriteComment("Source properties")
-                    .WriteLine()
+                        .WriteLine()
-                    .WriteComment("Source fields")
+                        .WriteComment("Type fields")
-                    .WriteMappedProperties(targetSourceType.SourceFields)
+                        .WriteComment()
-                    .WriteLine();
+                        .WriteMappedProperties(targetSourceType.TypeFields)
+                        .WriteLine()
+                        .WriteComment("Source fields")
+                        .WriteMappedProperties(targetSourceType.SourceFields)
+                        .WriteLine();
+
+            }
+
 
             builder
                 // Class declaration
@@ -52,10 +58,14 @@ namespace MapTo.Extensions
                 .WriteLine()
                 // Class body
                 .GeneratePublicConstructor(model);
+            foreach (var targetSourceType in model.MappedSourceTypes)
+            {
+                if (model.IsTypeUpdatable && targetSourceType.TypeProperties.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
+                if (model.IsTypeUpdatable && targetSourceType.TypeFields.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
+            }
             
             if (model.IsJsonExtension) builder.WriteToJsonMethod(model);
-            if (model.IsTypeUpdatable && targetSourceType.TypeProperties.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
+
-            if (model.IsTypeUpdatable && targetSourceType.TypeFields.GetWritableMappedProperties().Length > 0) builder.GenerateUpdateMethod(model);
 
             builder
                 .WriteLine()
@@ -70,46 +80,47 @@ namespace MapTo.Extensions
 
         private static SourceBuilder GeneratePublicConstructor(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
-            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
             const string mappingContextParameterName = "context";
 
-            var baseConstructor = /*model.HasMappedBaseClass ? $" : base({mappingContextParameterName}, {sourceClassParameterName})" :*/ string.Empty;
+            foreach (var targetSourceType in model.MappedSourceTypes)
-
-            var stringBuilder = new StringBuilder();
-
-            var otherProperties = new List<MappedMember>();
-
-            foreach (var property in targetSourceType.TypeProperties)
             {
-                if (!targetSourceType.SourceProperties.IsMappedProperty(property))
+                var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
+                var baseConstructor = /*model.HasMappedBaseClass ? $" : base({mappingContextParameterName}, {sourceClassParameterName})" :*/ string.Empty;
+                var stringBuilder = new StringBuilder();
+                var otherProperties = new List<MappedMember>();
+
+                foreach (var property in targetSourceType.TypeProperties)
                 {
-                    stringBuilder.Append(", ");
+                    if (!targetSourceType.SourceProperties.IsMappedProperty(property))
-                    stringBuilder.Append($"{property.FullyQualifiedType} {property.SourcePropertyName.ToCamelCase()}");
+                    {
-                    otherProperties.Add(property);
+                        stringBuilder.Append(", ");
-                }
+                        stringBuilder.Append($"{property.FullyQualifiedType} {property.SourcePropertyName.ToCamelCase()}");
-            }
+                        otherProperties.Add(property);
+                    }
                     
-            foreach (var property in targetSourceType.TypeFields)
+                }
-            {
+                foreach (var property in targetSourceType.TypeFields)
-                if (!targetSourceType.SourceFields.IsMappedProperty(property))
                 {
-                    stringBuilder.Append(", ");
+                    if (!targetSourceType.SourceFields.IsMappedProperty(property))
-                    stringBuilder.Append($"{property.FullyQualifiedType} {property.SourcePropertyName.ToCamelCase()}");
+                    {
-                    otherProperties.Add(property);
+                        stringBuilder.Append(", ");
+                        stringBuilder.Append($"{property.FullyQualifiedType} {property.SourcePropertyName.ToCamelCase()}");
+                        otherProperties.Add(property);
+                    }
                 }
+                
+                var readOnlyPropertiesArguments = stringBuilder.ToString();
+
+                builder
+                    .WriteLine($"public {model.TypeIdentifierName}({targetSourceType.SourceType} {sourceClassParameterName}{readOnlyPropertiesArguments}){baseConstructor}")
+                    .WriteOpeningBracket()
+                    .WriteAssignmentMethod(model, otherProperties.ToArray().ToImmutableArray(), sourceClassParameterName, mappingContextParameterName, false);
+
+                builder.WriteClosingBracket();
             }
 
-
-            var readOnlyPropertiesArguments = stringBuilder.ToString();
-
-            builder
-                .WriteLine($"public {model.TypeIdentifierName}({targetSourceType.SourceType} {sourceClassParameterName}{readOnlyPropertiesArguments}){baseConstructor}")
-                .WriteOpeningBracket()
-                .WriteAssignmentMethod(model, otherProperties.ToArray().ToImmutableArray(), sourceClassParameterName, mappingContextParameterName, false);
-
             // End constructor declaration
-            return builder.WriteClosingBracket();
+            return builder;
         }
 
         private static bool IsMappedProperty(this System.Collections.Immutable.ImmutableArray<MappedMember> properties, MappedMember property)
@@ -131,29 +142,33 @@ namespace MapTo.Extensions
                 .WriteLine("var stringBuilder = new System.Text.StringBuilder();")
                 .WriteLine(GetStringBuilderAppendNoInterpolation("{"));
 
-            var targetSourceType = model.MappedSourceTypes[0];
+            foreach (var targetSourceType in model.MappedSourceTypes)
-            foreach (var property in targetSourceType.TypeProperties)
             {
-                if (!property.isEnumerable)
+                foreach (var property in targetSourceType.TypeProperties)
-                    HandlePropertyEnumerable(builder, property);
-                else
                 {
-                    builder = WriteJsonField(builder, property);
+                    if (!property.isEnumerable)
+                        HandlePropertyEnumerable(builder, property);
+                    else
+                    {
+                        builder = WriteJsonField(builder, property);
+                    }
                 }
-            }
+                foreach (var property in targetSourceType.TypeFields)
-            foreach (var property in targetSourceType.TypeFields)
-            {
-                if (!property.isEnumerable)
-                    HandleFieldEnumerable(builder, property);
-                else
                 {
-                    builder.WriteLine(GetStringBuilderAppend($"\\\"{property.Name.ToCamelCase()}\\\" : [{GetJsonArrayValue(property, ref builder)}],"));
+                    if (!property.isEnumerable)
+                        HandleFieldEnumerable(builder, property);
+                    else
+                    {
+                        builder.WriteLine(GetStringBuilderAppend($"\\\"{property.Name.ToCamelCase()}\\\" : [{GetJsonArrayValue(property, ref builder)}],"));
+                    }
                 }
+                
+                builder.WriteLine(GetStringBuilderAppendNoInterpolation("}"));
+                builder.WriteLine("return stringBuilder.ToString();");
+                builder.WriteClosingBracket();
             }
             
-            builder.WriteLine(GetStringBuilderAppendNoInterpolation("}"));
+
-            builder.WriteLine("return stringBuilder.ToString();");
-            builder.WriteClosingBracket();
             return builder;
         }
 
@@ -231,33 +246,48 @@ namespace MapTo.Extensions
         private static SourceBuilder WriteAssignmentMethod(this SourceBuilder builder, MappingModel model, System.Collections.Immutable.ImmutableArray<MappedMember>? otherProperties,
             string? sourceClassParameterName, string mappingContextParameterName, bool fromUpdate)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
 
-            foreach (var property in targetSourceType.SourceProperties)
+            List<MappedMember> _addedMembers = new List<MappedMember>();
+
+            foreach (var targetSourceType in model.MappedSourceTypes)
             {
-                if (property.isReadOnly && fromUpdate) continue;
+                foreach (var property in targetSourceType.SourceProperties)
+                {
+                    if (property.isReadOnly && fromUpdate) continue;
+                    if(_addedMembers.Contains(property)) continue;
                     
-                builder.WriteLine($"{property.Name} = {sourceClassParameterName}.{property.SourcePropertyName};");
 
+                    builder.WriteLine($"{property.Name} = {sourceClassParameterName}.{property.SourcePropertyName};");
+                    _addedMembers.Add(property);
+
+                }
+
+                foreach (var property in targetSourceType.SourceFields)
+                {
+                    if (property.isReadOnly && fromUpdate) continue;
+                    if(_addedMembers.Contains(property)) continue;
+
+                    builder.WriteLine($"{property.Name} = {sourceClassParameterName}.{property.SourcePropertyName};");
+                    _addedMembers.Add(property);
+
+                }
+
+                if (otherProperties == null) return builder;
+
+                foreach (var property in otherProperties)
+                {
+                    if(_addedMembers.Contains(property)) continue;
+
+                    builder.WriteLine(property.MappedSourcePropertyTypeName is null
+                        ? $"{property.Name} = {property.SourcePropertyName.ToCamelCase()};"
+                        : "");
+                    _addedMembers.Add(property);
+
+
+                }
             }
 
-            foreach (var property in targetSourceType.SourceFields)
-            {
-                if (property.isReadOnly && fromUpdate) continue;
             
-                builder.WriteLine($"{property.Name} = {sourceClassParameterName}.{property.SourcePropertyName};");
-
-            }
-
-            if (otherProperties == null) return builder;
-
-            foreach (var property in otherProperties)
-            {
-                builder.WriteLine(property.MappedSourcePropertyTypeName is null
-                ? $"{property.Name} = {property.SourcePropertyName.ToCamelCase()};"
-                : "");
-
-            }
 
             return builder;
 
@@ -266,15 +296,19 @@ namespace MapTo.Extensions
 
         private static SourceBuilder GenerateUpdateMethod(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
-            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
-            builder
+            foreach (var targetSourceType in model.MappedSourceTypes)
-               .GenerateUpdaterMethodsXmlDocs(model, sourceClassParameterName)
+            {
-               .WriteLine($"public void Update({targetSourceType.SourceType} {sourceClassParameterName})")
+                var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
-               .WriteOpeningBracket()
+
-               .WriteAssignmentMethod(model, null, sourceClassParameterName, "context", true)
+                builder
-               .WriteClosingBracket();
+                    .GenerateUpdaterMethodsXmlDocs(model, sourceClassParameterName)
+                    .WriteLine($"public void Update({targetSourceType.SourceType} {sourceClassParameterName})")
+                    .WriteOpeningBracket()
+                    .WriteAssignmentMethod(model, null, sourceClassParameterName, "context", true)
+                    .WriteClosingBracket();
+            }
+  
 
             return builder;
         }
@@ -286,28 +320,37 @@ namespace MapTo.Extensions
                 return builder;
             }
 
-            var targetSourceType = model.MappedSourceTypes[0];
+            foreach (var targetSourceType in model.MappedSourceTypes)
+            {
+                builder
+                    .WriteLine("/// <summary>")
+                    .WriteLine($"/// Updates <see cref=\"{model.TypeIdentifierName}\"/> and sets its participating properties")
+                    .WriteLine($"/// using the property values from <paramref name=\"{sourceClassParameterName}\"/>.")
+                    .WriteLine("/// </summary>")
+                    .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{targetSourceType.SourceType}\"/> to use as source.</param>");
 
-            return builder
+            }
-                .WriteLine("/// <summary>")
+
-                .WriteLine($"/// Updates <see cref=\"{model.TypeIdentifierName}\"/> and sets its participating properties")
+            return builder;
-                .WriteLine($"/// using the property values from <paramref name=\"{sourceClassParameterName}\"/>.")
-                .WriteLine("/// </summary>")
-                .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{targetSourceType.SourceType}\"/> to use as source.</param>");
         }
         
         private static SourceBuilder GenerateEnumerableJsonSourceTypeExtensionMethod(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
 
-            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
+            foreach (var targetSourceType in model.MappedSourceTypes)
+            {
+                var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
-            return builder
+                builder
-                .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
+                    .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
-                .WriteLine($"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static string ToJson(this IEnumerable<{targetSourceType.SourceType}{model.Options.NullableReferenceSyntax}> {sourceClassParameterName}List)")
+                    .WriteLine($"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static string ToJson(this IEnumerable<{targetSourceType.SourceType}{model.Options.NullableReferenceSyntax}> {sourceClassParameterName}List)")
-                .WriteOpeningBracket()
+                    .WriteOpeningBracket()
-                .WriteLine($"return {sourceClassParameterName} == null ? null : new {model.TypeIdentifierName}({sourceClassParameterName});")
+                    .WriteLine($"return {sourceClassParameterName} == null ? null : new {model.TypeIdentifierName}({sourceClassParameterName});")
-                .WriteClosingBracket();
+                    .WriteClosingBracket();
+            }
+
+
+            return builder;
         }
     }
 }

include/BlueWest.MapTo/src/BlueWest.MapTo/Sources/MapRecordSource.cs

@@ -22,15 +22,18 @@ namespace MapTo.Sources
                 .WriteLine($"partial record {model.TypeIdentifierName}")
                 .WriteOpeningBracket();
 
-            var targetSourceType = model.MappedSourceTypes[0];
+            foreach (var targetSourceType in model.MappedSourceTypes)
+            {
+                if (targetSourceType.GenerateSecondaryConstructor)
+                {
+                    builder
+                        .GenerateSecondaryConstructor(model)
+                        .WriteLine();
+                } 
+            }
 
             // Class body
-            if (targetSourceType.GenerateSecondaryConstructor)
+            
-            {
-                builder
-                    .GenerateSecondaryConstructor(model)
-                    .WriteLine();
-            }
 
             builder
                 .GeneratePrivateConstructor(model)
@@ -55,105 +58,118 @@ namespace MapTo.Sources
         private static SourceBuilder GenerateSecondaryConstructor(this SourceBuilder builder, MappingModel model)
         {
             // grab first data from array
-            var targetSourceType = model.MappedSourceTypes[0];
-            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
-            if (model.Options.GenerateXmlDocument)
+            foreach (var targetSourceType in model.MappedSourceTypes)
             {
-                builder
+                var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
-                    .WriteLine("/// <summary>")
+                if (model.Options.GenerateXmlDocument)
-                    .WriteLine($"/// Initializes a new instance of the <see cref=\"{model.TypeIdentifierName}\"/> class")
+                {
-                    .WriteLine($"/// using the property values from the specified <paramref name=\"{sourceClassParameterName}\"/>.")
+                    builder
-                    .WriteLine("/// </summary>")
+                        .WriteLine("/// <summary>")
-                    .WriteLine($"/// <exception cref=\"ArgumentNullException\">{sourceClassParameterName} is null</exception>");
+                        .WriteLine($"/// Initializes a new instance of the <see cref=\"{model.TypeIdentifierName}\"/> class")
+                        .WriteLine($"/// using the property values from the specified <paramref name=\"{sourceClassParameterName}\"/>.")
+                        .WriteLine("/// </summary>")
+                        .WriteLine($"/// <exception cref=\"ArgumentNullException\">{sourceClassParameterName} is null</exception>");
+                }
+                builder .WriteLine($"{model.Options.ConstructorAccessModifier.ToLowercaseString()} {model.TypeIdentifierName}({targetSourceType.SourceType} {sourceClassParameterName})")
+                    .WriteLine($"    : this(new {MappingContextSource.ClassName}(), {sourceClassParameterName}) {{ }}");
             }
 
-            return builder
+
-                .WriteLine($"{model.Options.ConstructorAccessModifier.ToLowercaseString()} {model.TypeIdentifierName}({targetSourceType.SourceType} {sourceClassParameterName})")
+
-                .WriteLine($"    : this(new {MappingContextSource.ClassName}(), {sourceClassParameterName}) {{ }}");
+            return builder;
+
         }
 
         private static SourceBuilder GeneratePrivateConstructor(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
-
-            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
             const string mappingContextParameterName = "context";
 
-            builder
+            foreach (var targetSourceType in model.MappedSourceTypes)
-                .WriteLine($"private protected {model.TypeIdentifierName}({MappingContextSource.ClassName} {mappingContextParameterName}, {targetSourceType.SourceType} {sourceClassParameterName})")
+            {
-                .Indent()
+                var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
-                .Write(": this(").
+                builder
-
+                    .WriteLine(
-            WriteProperties(model, sourceClassParameterName, mappingContextParameterName)
+                        $"private protected {model.TypeIdentifierName}({MappingContextSource.ClassName} {mappingContextParameterName}, {targetSourceType.SourceType} {sourceClassParameterName})")
-
+                    .Indent()
-            .WriteLine(")")
+                    .Write(": this(").WriteProperties(model, sourceClassParameterName, mappingContextParameterName)
-                .Unindent()
+                    .WriteLine(")")
-                .WriteOpeningBracket()
+                    .Unindent()
-                .WriteLine($"if ({mappingContextParameterName} == null) throw new ArgumentNullException(nameof({mappingContextParameterName}));")
+                    .WriteOpeningBracket()
-                .WriteLine($"if ({sourceClassParameterName} == null) throw new ArgumentNullException(nameof({sourceClassParameterName}));")
+                    .WriteLine($"if ({mappingContextParameterName} == null) throw new ArgumentNullException(nameof({mappingContextParameterName}));")
-                .WriteLine()
+                    .WriteLine($"if ({sourceClassParameterName} == null) throw new ArgumentNullException(nameof({sourceClassParameterName}));")
-                .WriteLine($"{mappingContextParameterName}.{MappingContextSource.RegisterMethodName}({sourceClassParameterName}, this);");
+                    .WriteLine()
-
+                    .WriteLine($"{mappingContextParameterName}.{MappingContextSource.RegisterMethodName}({sourceClassParameterName}, this);")
+                    .WriteClosingBracket();
+            }
             // End constructor declaration
-            return builder.WriteClosingBracket();
+            return builder;
         }
 
         private static SourceBuilder WriteProperties(this SourceBuilder builder, MappingModel model, string sourceClassParameterName,
             string mappingContextParameterName)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
 
-            for (var i = 0; i < targetSourceType.SourceProperties.Length; i++)
+            foreach (var targetSourceType in model.MappedSourceTypes)
             {
-                var property = targetSourceType.SourceProperties[i];
+                for (var i = 0; i < targetSourceType.SourceProperties.Length; i++)
-                if (property.TypeConverter is null)
                 {
-                    if (property.IsEnumerable)
+                    var property = targetSourceType.SourceProperties[i];
+                    if (property.TypeConverter is null)
                     {
-                        builder.Write(
+                        if (property.IsEnumerable)
-                            $"{property.Name}: {sourceClassParameterName}.{property.SourcePropertyName}.Select({mappingContextParameterName}.{MappingContextSource.MapMethodName}<{property.MappedSourcePropertyTypeName}, {property.EnumerableTypeArgument}>).ToList()");
+                        {
+                            builder.Write(
+                                $"{property.Name}: {sourceClassParameterName}.{property.SourcePropertyName}.Select({mappingContextParameterName}.{MappingContextSource.MapMethodName}<{property.MappedSourcePropertyTypeName}, {property.EnumerableTypeArgument}>).ToList()");
+                        }
+                        else
+                        {
+                            builder.Write(property.MappedSourcePropertyTypeName is null
+                                ? $"{property.Name}: {sourceClassParameterName}.{property.SourcePropertyName}"
+                                : $"{property.Name}: {mappingContextParameterName}.{MappingContextSource.MapMethodName}<{property.MappedSourcePropertyTypeName}, {property.Type}>({sourceClassParameterName}.{property.SourcePropertyName})");
+                        }
                     }
                     else
                     {
-                        builder.Write(property.MappedSourcePropertyTypeName is null
+                        var parameters = property.TypeConverterParameters.IsEmpty
-                            ? $"{property.Name}: {sourceClassParameterName}.{property.SourcePropertyName}"
+                            ? "null"
-                            : $"{property.Name}: {mappingContextParameterName}.{MappingContextSource.MapMethodName}<{property.MappedSourcePropertyTypeName}, {property.Type}>({sourceClassParameterName}.{property.SourcePropertyName})");
+                            : $"new object[] {{ {string.Join(", ", property.TypeConverterParameters)} }}";
+
+                        builder.Write(
+                            $"{property.Name}: new {property.TypeConverter}().Convert({sourceClassParameterName}.{property.SourcePropertyName}, {parameters})");
+                    }
+
+                    if (i < targetSourceType.SourceProperties.Length - 1)
+                    {
+                        builder.Write(", ");
                     }
                 }
-                else
-                {
-                    var parameters = property.TypeConverterParameters.IsEmpty
-                        ? "null"
-                        : $"new object[] {{ {string.Join(", ", property.TypeConverterParameters)} }}";
-
-                    builder.Write(
-                        $"{property.Name}: new {property.TypeConverter}().Convert({sourceClassParameterName}.{property.SourcePropertyName}, {parameters})");
-                }
-
-                if (i < targetSourceType.SourceProperties.Length - 1)
-                {
-                    builder.Write(", ");
-                }
             }
 
+            
+
             return builder;
         }
 
         private static SourceBuilder GenerateFactoryMethod(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
+            foreach (var targetSourceType in model.MappedSourceTypes)
-            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
+            {
+                var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
-            return builder
+                builder
-                .GenerateConvertorMethodsXmlDocs(model, sourceClassParameterName)
+                    .GenerateConvertorMethodsXmlDocs(model, sourceClassParameterName)
-                .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
+                    .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
-                .WriteLine(
+                    .WriteLine(
-                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} From({targetSourceType.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
+                        $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} From({targetSourceType.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
-                .WriteOpeningBracket()
+                    .WriteOpeningBracket()
-                .WriteLine(
+                    .WriteLine(
-                    $"return {sourceClassParameterName} == null ? null : {MappingContextSource.ClassName}.{MappingContextSource.FactoryMethodName}<{targetSourceType.SourceType}, {model.TypeIdentifierName}>({sourceClassParameterName});")
+                        $"return {sourceClassParameterName} == null ? null : {MappingContextSource.ClassName}.{MappingContextSource.FactoryMethodName}<{targetSourceType.SourceType}, {model.TypeIdentifierName}>({sourceClassParameterName});")
-                .WriteClosingBracket();
+                    .WriteClosingBracket();
+            }
+            
+
+            return builder;
         }
 
         private static SourceBuilder GenerateConvertorMethodsXmlDocs(this SourceBuilder builder, MappingModel model, string sourceClassParameterName)
@@ -162,44 +178,58 @@ namespace MapTo.Sources
             {
                 return builder;
             }
-            var targetSourceType = model.MappedSourceTypes[0];
 
-            return builder
+            foreach (var targetSourceType in model.MappedSourceTypes)
-                .WriteLine("/// <summary>")
+            {
-                .WriteLine($"/// Creates a new instance of <see cref=\"{model.TypeIdentifierName}\"/> and sets its participating properties")
+                builder
-                .WriteLine($"/// using the property values from <paramref name=\"{sourceClassParameterName}\"/>.")
+                    .WriteLine("/// <summary>")
-                .WriteLine("/// </summary>")
+                    .WriteLine($"/// Creates a new instance of <see cref=\"{model.TypeIdentifierName}\"/> and sets its participating properties")
-                .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{targetSourceType.SourceType}\"/> to use as source.</param>")
+                    .WriteLine($"/// using the property values from <paramref name=\"{sourceClassParameterName}\"/>.")
-                .WriteLine(
+                    .WriteLine("/// </summary>")
-                    $"/// <returns>A new instance of <see cred=\"{model.TypeIdentifierName}\"/> -or- <c>null</c> if <paramref name=\"{sourceClassParameterName}\"/> is <c>null</c>.</returns>");
+                    .WriteLine($"/// <param name=\"{sourceClassParameterName}\">The instance of <see cref=\"{targetSourceType.SourceType}\"/> to use as source.</param>")
+                    .WriteLine(
+                        $"/// <returns>A new instance of <see cred=\"{model.TypeIdentifierName}\"/> -or- <c>null</c> if <paramref name=\"{sourceClassParameterName}\"/> is <c>null</c>.</returns>");
+            }
+
+            return builder;
+
         }
 
         private static SourceBuilder GenerateSourceTypeExtensionClass(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
+            foreach (var targetSourceType in model.MappedSourceTypes)
+            {
+                builder
+                    .WriteLine(
+                        $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static partial class {targetSourceType.SourceTypeIdentifierName}To{model.TypeIdentifierName}Extensions")
+                    .WriteOpeningBracket()
+                    .GenerateSourceTypeExtensionMethod(model)
+                    .WriteClosingBracket();
+            }
 
-            return builder
+            return builder;
-                .WriteLine(
-                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static partial class {targetSourceType.SourceTypeIdentifierName}To{model.TypeIdentifierName}Extensions")
-                .WriteOpeningBracket()
-                .GenerateSourceTypeExtensionMethod(model)
-                .WriteClosingBracket();
         }
 
         private static SourceBuilder GenerateSourceTypeExtensionMethod(this SourceBuilder builder, MappingModel model)
         {
-            var targetSourceType = model.MappedSourceTypes[0];
 
-            var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
+            foreach (var targetSourceType in model.MappedSourceTypes)
+            {
+                var sourceClassParameterName = targetSourceType.SourceTypeIdentifierName.ToCamelCase();
 
-            return builder
+                builder
-                .GenerateConvertorMethodsXmlDocs(model, sourceClassParameterName)
+                    .GenerateConvertorMethodsXmlDocs(model, sourceClassParameterName)
-                .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
+                    .WriteLineIf(model.Options.SupportNullableStaticAnalysis, $"[return: NotNullIfNotNull(\"{sourceClassParameterName}\")]")
-                .WriteLine(
+                    .WriteLine(
-                    $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} To{model.TypeIdentifierName}(this {targetSourceType.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
+                        $"{model.Options.GeneratedMethodsAccessModifier.ToLowercaseString()} static {model.TypeIdentifierName}{model.Options.NullableReferenceSyntax} To{model.TypeIdentifierName}(this {targetSourceType.SourceType}{model.Options.NullableReferenceSyntax} {sourceClassParameterName})")
-                .WriteOpeningBracket()
+                    .WriteOpeningBracket()
-                .WriteLine($"return {sourceClassParameterName} == null ? null : new {model.TypeIdentifierName}({sourceClassParameterName});")
+                    .WriteLine($"return {sourceClassParameterName} == null ? null : new {model.TypeIdentifierName}({sourceClassParameterName});")
-                .WriteClosingBracket();
+                    .WriteClosingBracket();
+
+            }
+
+
+            return builder;
         }
     }
 }