public void ConstructFieldOrPropertySetterFixture()
{
var action = ReflectionExtensions.ConstructFieldOrPropertySetter <ObjectWithProperties, int>("Property4");
var obj = new ObjectWithProperties();
obj.Property4 = 5;
action(obj, 2);
obj.Property4.Should().Equal(2);
}
//public static Expression GetForeinKeyValue<T, TProperty>(Expression<Func<T, TProperty>> property)
//{
// var type = typeof(T);
// var keyName = type.GetRuntimeProperty(typeof(TProperty).Name).GetCustomAttribute<ForeignKeyAttribute>().Name;
// MemberExpression getter = ReflectionExtensions.ConstructFieldOrPropertyGetter(Expression.Parameter(type), keyName);
// return null;
//}
public static Expression <Func <T, TProperty, bool> > GetForeinKeyPredicate <T, TProperty>(Expression <Func <T, TProperty> > path, out Action <T, TProperty> setter)
{
var type = typeof(T);
var typeProperty = typeof(TProperty);
var foreignKeyEntityMember = ((MemberExpression)path.Body).Member;
var keyName = foreignKeyEntityMember.CustomAttributes.First(attrData => attrData.AttributeType == typeof(ForeignKeyAttribute)).ConstructorArguments[0].Value.ToString();
var baseEntityParameter = Expression.Parameter(type, "TBaseEntity");
var foreignEntityParameter = Expression.Parameter(typeProperty, "TForeignEntity");
MemberExpression foreignKeyGetter = ReflectionExtensions.ConstructFieldOrPropertyGetter(baseEntityParameter, keyName);
MemberExpression primaryKeyGetter = ReflectionExtensions.ConstructFieldOrPropertyGetter(foreignEntityParameter, keyName);
var binary = Expression.Equal(foreignKeyGetter, primaryKeyGetter);
setter = ReflectionExtensions.ConstructFieldOrPropertySetter <T, TProperty>(foreignKeyEntityMember.Name);
return(Expression.Lambda <Func <T, TProperty, bool> >(binary, baseEntityParameter, foreignEntityParameter));
}
