private void ConvertPropertyToGetByIdField(PropertyInfo field)
{
var genericArguments = field.PropertyType.GetGenericArguments();
var entityType = genericArguments[0];
var idType = genericArguments[1];
// construct resolving method
Func <ResolveFieldContext <object>, object> resolve = (context) =>
{
// get the connection delegate
var method = ((Delegate)(field.GetValue(this)));
// convert the global id to local id
var globalId = context.GetArgument <string>(entityType.GetIdPropertyName().ToFirstLower());
var id = GlobalId.ToLocalId(idType, globalId);
// invoke field with "context" and "id"
return(method.DynamicInvoke(new object[] { context, id }));
};
// handle authentication and authorization
var isAuthenticationRequired = field.GetAttribute <FieldAttribute>().IsAuthenticationRequired;
var requiredRoles = field.GetRequiredRoles();
var graphQLField = this.AddSingleField(entityType, resolve, field.Name.ToFirstLower());
graphQLField.RequiresRoles(requiredRoles);
graphQLField.RequiresAuthentication(isAuthenticationRequired);
}
public DeletePayload(DeleteInput input, bool ok)
{
this.Id = GlobalId.ToLocalId <TId>(input.Id);
this.ClientMutationId = input.ClientMutationId;
this.Viewer = new TViewer();
this.Ok = ok;
}
public static FieldType CreateDeleteMutation <TId, TEntity, TViewer>(this ObjectGraphType <object> type, Func <ResolveFieldContext <object>, object, object, object> resolve, string mutationName = null) where TEntity : class
{
// construct DeletePayloadType<Order>
var entityType = typeof(TEntity);
var deletePayloadType = typeof(DeletePayloadType <,>).MakeGenericType(entityType, typeof(TViewer));
deletePayloadType = deletePayloadType.ConvertToVirtualType();
// construct mutation name (i.e. "deleteOrder")
var fieldName = mutationName != null ? mutationName : $"delete{entityType.Name}";
// construct NonNullGraphType<DeleteInputType<Order>>
var deleteInputType = typeof(DeleteInputType <>).MakeGenericType(entityType);
var nonNullableGraphType = typeof(NonNullGraphType <>);
nonNullableGraphType = nonNullableGraphType.MakeGenericType(deleteInputType);
// construct arguments
var argument = new QueryArgument(nonNullableGraphType)
{
Name = "input"
};
var arguments = new QueryArguments(argument);
// construct resolver
Func <ResolveFieldContext <object>, object> resolver = (context) =>
{
var input = context.GetArgument <DeleteInput>("input");
var id = GlobalId.ToLocalId <TId>(input.Id);
return(resolve(context, id, input));
};
// call Field like type.Field<DeletePayloadType<Order>>("deleteOrder", args, resolve)
var method = type.GetType().GetMethods().First(m => m.Name == "Field" && m.IsGenericMethod && m.ReturnType == typeof(FieldType));
method = method.MakeGenericMethod(deletePayloadType);
return((FieldType)method.Invoke(type, new object[] { fieldName, null, arguments, resolver, null }));
}
private static T CloneProperties <T>(object subject, T clone, bool omitIdProperty)
{
var cloneType = clone.GetType();
foreach (var property in subject.GetType().GetProperties())
{
// skip properties that do not have setters
if (property.GetSetMethod() == null)
{
continue;
}
var propertyValue = property.GetValue(subject, null);
var cloneProperty = cloneType.GetProperty(property.Name);
// handle id
if (property.Name == "Id" && !omitIdProperty)
{
var attribute = subject.GetType().GetTypeInfo().GetCustomAttribute <TypeDescriptionProviderAttribute>();
var idTypeName = attribute.TypeName;
if (idTypeName.Contains("Guid"))
{
var idValue = Guid.Empty;
try
{
idValue = GlobalId.ToLocalId <Guid>((string)propertyValue);
}
catch
{
idValue = Guid.Empty;
}
cloneProperty.SetValue(clone, idValue);
}
if (idTypeName.Contains("Int32"))
{
var idValue = GlobalId.ToLocalId <int>((string)propertyValue);
cloneProperty.SetValue(clone, idValue);
}
continue;
}
// handle foreign keys
if (property.Name.EndsWith("Id"))
{
try
{
cloneProperty.SetValue(clone, propertyValue);
}
catch
{
var targetTypeName = cloneProperty.PropertyType.Name;
if (targetTypeName.Contains("Guid"))
{
var value = Guid.Empty;
try
{
value = GlobalId.ToLocalId <Guid>((string)propertyValue);
}
catch
{
value = Guid.Empty;
}
cloneProperty.SetValue(clone, value);
}
if (targetTypeName.Contains("Int32"))
{
var value = GlobalId.ToLocalId <int>((string)propertyValue);
cloneProperty.SetValue(clone, value);
}
continue;
}
}
// handle collections
if (property.PropertyType.GetTypeInfo().GetInterface("ICollection") != null && property.PropertyType.IsGenericType())
{
// skip properties without setters
if (cloneProperty.GetSetMethod() == null)
{
continue;
}
var collectionType = property.PropertyType.GetGenericTypeDefinition();
var parameterType = property.PropertyType.GenericTypeArguments[0];
var cloneCollectionType = cloneProperty.PropertyType.GetGenericTypeDefinition();
var cloneParameterType = cloneProperty.PropertyType.GenericTypeArguments[0];
var collection = (IList)propertyValue;
IList cloneCollection = null;
if (collection != null)
{
cloneCollection = (IList)Activator.CreateInstance(cloneProperty.PropertyType);
foreach (var item in collection)
{
cloneCollection.Add(item.CloneAs(cloneParameterType));
}
}
cloneProperty.SetValue(clone, cloneCollection);
continue;
}
// handle all other properties
cloneProperty.SetValue(clone, propertyValue);
}
return(clone);
}
public TId GetBefore <TId>()
{
return(this.before != null?GlobalId.ToLocalId <TId>(this.before) : default(TId));
}
public TId GetAfter <TId>()
{
return(this.after != null?GlobalId.ToLocalId <TId>(this.after) : default(TId));
}