private static void ValidateForeignKeyNames(Association element, List <string> errorMessages)
{
if (!string.IsNullOrWhiteSpace(element.FKPropertyName))
{
string[] foreignKeyPropertyNames = element.GetForeignKeyPropertyNames();
string tag = $"({element.Source.Name}:{element.Target.Name})";
if (element.Dependent == null)
{
errorMessages.Add($"{tag} can't have foreign keys defined; no dependent role found");
return;
}
int propertyCount = foreignKeyPropertyNames.Length;
int identityCount = element.Principal.AllIdentityAttributes.Count();
if (propertyCount != identityCount)
{
errorMessages.Add($"{tag} foreign key must have zero or {identityCount} {(identityCount == 1 ? "property" : "properties")} defined, "
+ $"since {element.Principal.Name} has {identityCount} identity properties. Found {propertyCount} instead");
}
// validate names
foreach (string propertyName in foreignKeyPropertyNames)
{
if (!CodeGenerator.IsValidLanguageIndependentIdentifier(propertyName))
{
errorMessages.Add($"{tag} FK property name '{propertyName}' isn't a valid .NET identifier");
}
if (element.Dependent.AllAttributes.Except(element.Dependent.Attributes).Any(a => a.Name == propertyName))
{
errorMessages.Add($"{tag} FK property name '{propertyName}' is used in a base class of {element.Dependent.Name}");
}
}
// ensure no FKs are autogenerated identities
errorMessages.AddRange(element.GetFKAutoIdentityErrors()
.Select(attribute => $"{attribute.Name} in {element.Dependent.FullName} is an auto-generated identity. Migration will fail."));
}
}
