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modelLINQ is a simple library to help you build and reuse expression tree data transfer object modeling from some source (generally a database) to another source. Removing all the burden of writing all the types of Expressions needed to generate a simple model, allowing you to only worry about the bindings between objects.

Documentation

How to use

dotnet cli

dotnet add package modelLINQ

Package Manager

Install-Package modelLINQ

Or see on Nuget

Begin writing DTO bindings!

How to write bindings

Let's say we have a class. Let's also assume it is a context class.

public class Customer
{
    public int Id { get; set; }
    public Person Person { get; set; }
}

And we want to be able to map to a an object - Keeping it simple.

public class CustomerModel
{
	public int Id { get; set; }
	// Let's just assume this is defined
	public PersonModel PersonModel { get; set;}
}

With modelLINQ we can create a reusable expression tree to build this model. Lets look at the basic bindings.

// By taking a parameter expression we can define the bindings
static Func<Expression, MemeberAssignment[]> bindings = param =>
{
    return new MemberAssignment[] {
	    param.DirectBind<CustomerModel>("Id"),
	    // Notice we can easily reuse previously made bindings
	    param.ObjectBind<CustomerModel, Person, PersonModel>(
		    "PersonModel", PersonModel.bindings, "Person")
    };
};

And now we can use our bindings to project the CustomerModel

databse.Customers.Select(bindings.Model<Customer, CustomerModel>()).ToList()

Additional Information

I left all the functions public to allow the developer to create additional binding trees based on the existing. If you notice there are missing functions that you find yourself using a lot, please open an issue!

Made with ♥ by Ryan English