Example of OrmLite UpdateOnly with Multiple Fields
ormlite-servicestack, servicestack
Solution
An example was give in the following question: ServiceStack Ormlite and RowVersion support
A valid expression to use is an anonymous type; even one with implicit member names as described in this question: C#: Anonymous types and property names.
db.UpdateOnly(new Person { FirstName = "JJ", Age = 12 },
(Person p) => new { p.FirstName, p.Age } );
Note that in my example I declared the type of the lambda argument. This may not be strictly necessary, but I was getting a Mono compiler error without it.
Error CS0016: Could not write to file `***', cause: Type '<>__AnonType1`2' was not completed.
Problem
Is it possible to use the OrmLite extension method UpdateOnly to update multiple fields at once? The example given in the documentation is: ``` db.UpdateOnly(new Person { FirstName = "JJ" }, p => p.FirstName); ``` Can I provide an expression with multiple fields in it? If so, what's the best operator to use given that the fields may be different data types.