Author: chriseyre2000

Entity Framework Code First Fluent API – Can I create a fluent rules engine.

~ chriseyre2000 ~ Leave a comment

I am currently working through a lot of training courses (due to my employer being in special administration).

I have started on the Entity Framework Code First modules.
EF Code first seems to provide a declarative way of having a set of business entities that do not know about the database be persisted and loaded.

I am not interested in the annotation api since that is tying the business entities to the database.
[Rule #1 The model should not know about the view or the database.]

However the fluent api looks very interesting in that it can be used as an ORM (albeit a very simple one).
This means that a model could have two databases that it maps to (say old system and new system, or production and archive) that have distinct schema’s.

What would be interesting would be to see if this fluent api could not also be used as a validating rules engine. A given object can have different validation rules depending upon context.

Fitnesse and C#

~ chriseyre2000 ~ Leave a comment

Here are some sample fitnesse tests and fixtures.

!define COMMAND_PATTERN {%m -r fitnesse.fitServer.FitServer,dotnet2fit.dll %p}
!define TEST_RUNNER {dotnet2Runner.exe}
!path C:developfitnessedotnet2fittestfittestbinReleasefittest.dll

!|Import|
|fittest|

!|fittest.OurFirstTest|
|string1|string2|Concatenate?|
|Hello|World|HelloWorld|

!|fittest.SecondTest|
|a|b|Output?|
|One|Two|a = One;b = Two;|

!|ActionFixture|
|start|ActionFixtureTest|
|enter|firstPart|Hello|
|enter|secondPart|World|
|press|join|
|check|together|Hello, World|

namespace fittest
{
public class OurFirstTest : fit.ColumnFixture
{
public string string1;
public string string2;
public string Concatenate()
{
return string1 + string2;
}
}

public class SecondTest : fit.ColumnFixture
{
public string a;
public string b;
public string c;

public string Output()
{
StringBuilder sb = new StringBuilder();

if (a != null) sb.AppendFormat(“a = {0};”, a);
if (b != null) sb.AppendFormat(“b = {0};”, b);
if (c != null) sb.AppendFormat(“c = {0};”, c);
return sb.ToString();
}
}

public class ActionFixtureTest : fit.Fixture
{
public string FirstPart;
public string SecondPart;
public string Together;
public void Join()
{
Together = string.Format(“{0}, {1}”, FirstPart, SecondPart);
}

}
}