Closes #547 Add option to add relationship property attributes

src/EntityFrameworkCore.Generator.Core/OptionMapper.cs

@@ -154,6 +154,7 @@ private static void MapEntity(EntityClassOptions option, EntityClass entity)
         option.EntityNaming = entity.EntityNaming;
         option.RelationshipNaming = entity.RelationshipNaming;
         option.PrefixWithSchemaName = entity.PrefixWithSchemaName;
+        option.RelationshipAttributes = entity.RelationshipAttributes;
 
         MapSelection(option.Renaming, entity.Renaming);
     }

src/EntityFrameworkCore.Generator.Core/Options/EntityClassOptions.cs

@@ -79,4 +79,9 @@ public string BaseClass
     /// The renaming expressions.
     /// </value>
     public SelectionOptions Renaming { get; }
+
+    /// <summary>
+    /// Attributes which are added to the generated relationships, ;-separated
+    /// </summary>
+    public string RelationshipAttributes { get; set; }
 }

src/EntityFrameworkCore.Generator.Core/Serialization/EntityClass.cs

@@ -70,4 +70,9 @@ public EntityClass()
     /// The renaming expressions.
     /// </value>
     public SelectionModel Renaming { get; set; }
+
+    /// <summary>
+    /// Attributes which are added to the generated relationships, ;-separated
+    /// </summary>
+    public string RelationshipAttributes { get; set; }
 }

src/EntityFrameworkCore.Generator.Core/Templates/EntityClassTemplate.cs

@@ -177,6 +177,14 @@ private void GenerateRelationshipProperties()
                     CodeBuilder.AppendLine("/// </value>");
                 }
 
+                if (!Options.Data.Entity.RelationshipAttributes.IsNullOrWhiteSpace())
+                {
+                    var splittedAttributes = Options.Data.Entity.RelationshipAttributes.Split(';').Distinct()
+                        .Where(s => !s.IsNullOrWhiteSpace());
+
+                    foreach (var attribute in splittedAttributes)
+                        CodeBuilder.AppendLine($"[{attribute}]");
+                }
 
                 CodeBuilder.AppendLine($"public virtual ICollection<{primaryFullName}> {propertyName} {{ get; set; }}");
                 CodeBuilder.AppendLine();
@@ -196,6 +204,15 @@ private void GenerateRelationshipProperties()
                         CodeBuilder.AppendLine($"/// <seealso cref=\"{property.PropertyName}\" />");
                 }
 
+                if (!Options.Data.Entity.RelationshipAttributes.IsNullOrWhiteSpace())
+                {
+                    var splittedAttributes = Options.Data.Entity.RelationshipAttributes.Split(';').Distinct()
+                        .Where(s => !s.IsNullOrWhiteSpace());
+
+                    foreach (var attribute in splittedAttributes)
+                        CodeBuilder.AppendLine($"[{attribute}]");
+                }
+
                 if (!Options.Project.Nullable)
                     CodeBuilder.AppendLine($"public virtual {primaryFullName} {propertyName} {{ get; set; }}");
                 else if (relationship.Cardinality == Cardinality.One)

test/EntityFrameworkCore.Generator.Core.Tests/Options/full.yaml

@@ -34,6 +34,7 @@ data:
     relationshipNaming: Plural
     document: false
     prefixWithSchemaName: false
+    relationshipAttributes: ''
     renaming:
       entities:
         - ^(sp|tbl|udf|vw)_