Solutions for a simple multi tenant web application with entity framework

Question

I\'m developing a multi-tenant web app (stack: MVC 4 + Entity framework 4.3). My requirements are pretty simple: each tenant has the same UI and CodeBase.

In my databa

Answer 1

You can do the reflection check and then manually create an expression tree that EF can understand.

For example:

int tenantId = 5;

var tenantIdInfo = typeof(TEntity).GetProperty("TenantId");

if (tenantIdInfo != null)
{
    var entity = Expression.Parameter(typeof(TEntity), "it");

    var predicate = (Expression<Func<TEntity, bool>>)Expression.Lambda(
        Expression.Equal(
            Expression.MakeMemberAccess(entity, tenantIdInfo),
            Expression.Constant(tenantId, typeof(int))),
        entity);

    query = query.Where(predicate);
}