private static MemberExpression[] GetKeyExpressions(ModelBuilder.OeEdmModelMetadataProvider metadataProvider, Type entityType)
{
var keyPropertyList = new List <PropertyInfo>();
foreach (PropertyInfo property in entityType.GetProperties())
{
if (metadataProvider.IsKey(property))
{
keyPropertyList.Add(property);
}
}
if (keyPropertyList.Count == 0)
{
PropertyInfo keyProperty = entityType.GetPropertyIgnoreCase("Id");
if (keyProperty == null)
{
throw new InvalidOperationException("Key not found in " + entityType.Name);
}
keyPropertyList.Add(keyProperty);
}
PropertyInfo[] keyProperties = keyPropertyList.ToArray();
metadataProvider.SortClrPropertyByOrder(keyProperties);
var keyExpressions = new MemberExpression[keyProperties.Length];
ParameterExpression parameter = Expression.Parameter(entityType);
for (int i = 0; i < keyProperties.Length; i++)
{
keyExpressions[i] = Expression.Property(parameter, keyProperties[i]);
}
return(keyExpressions);
}
private FieldType CreateStructuralFieldType(PropertyInfo propertyInfo)
{
Type graphType;
bool isNullable = !_modelMetadataProvider.IsRequired(propertyInfo);
Type enumType = propertyInfo.PropertyType;
if (enumType.IsEnum || ((enumType = Nullable.GetUnderlyingType(enumType)) != null && enumType.IsEnum))
{
graphType = typeof(EnumerationGraphType <>).MakeGenericType(enumType);
if (!isNullable)
{
graphType = typeof(NonNullGraphType <>).MakeGenericType(graphType);
}
}
else
{
if (_modelMetadataProvider.IsKey(propertyInfo))
{
graphType = typeof(IdGraphType);
}
else
if (propertyInfo.PropertyType == typeof(DateTimeOffset) || propertyInfo.PropertyType == typeof(DateTimeOffset?))
{
graphType = typeof(DateTime).GetGraphTypeFromType(isNullable);
}
else
{
graphType = propertyInfo.PropertyType.GetGraphTypeFromType(isNullable);
}
}
var fieldType = new FieldType()
{
Name = propertyInfo.Name,
Type = graphType,
Resolver = new FieldResolver(propertyInfo),
};
return(fieldType);
}