/// <summary>
/// Determins the field is of the specified type.
/// </summary>
/// <typeparam name="T">The type of the elements of source.</typeparam>
/// <param name="source">The value to check.</param>
/// <param name="type">Type couch type to compare.</param>
/// <returns>true if the field has the specified type; otherwise, false.</returns>
public static bool IsCouchType <T>(this T source, CouchType couchType)
{
#pragma warning disable IDE0046 // Convert to conditional expression
if (couchType == CouchType.CNull && source == null)
{
return(true);
}
if (couchType == CouchType.CBoolean && source is bool)
{
return(true);
}
if (couchType == CouchType.CString && source is string)
{
return(true);
}
if (couchType == CouchType.CNumber && typeof(T).IsPrimitive)
{
return(true);
}
if (couchType == CouchType.CArray && source is IEnumerable)
{
return(true);
}
return(couchType == CouchType.CObject && typeof(T).IsClass);
#pragma warning restore IDE0046 // Convert to conditional expression
}
private Expression VisitIsCouchTypeMethod(MethodCallExpression m)
{
_sb.Append("{");
Visit(m.Arguments[0]);
_sb.Append(":{\"$type\":");
ConstantExpression cExpression = m.Arguments[1] as ConstantExpression ?? throw new ArgumentException("Argument is not of type ConstantExpression.");
CouchType couchType = cExpression.Value as CouchType ?? throw new ArgumentException("Argument is not of type CouchType.");
_sb.Append($"\"{couchType.Value}\"");
_sb.Append("}}");
return(m);
}
/// <summary>
/// Determines the field is of the specified type.
/// </summary>
/// <typeparam name="T">The type of the elements of source.</typeparam>
/// <param name="source">The value to check.</param>
/// <param name="couchType">Type couch type to compare.</param>
/// <returns>true if the field has the specified type; otherwise, false.</returns>
public static bool IsCouchType <T>(this T source, CouchType couchType)
{
if (couchType == CouchType.CNull && source == null)
{
return(true);
}
if (couchType == CouchType.CBoolean && source is bool)
{
return(true);
}
if (couchType == CouchType.CString && source is string)
{
return(true);
}
if (couchType == CouchType.CNumber && typeof(T).IsPrimitive)
{
return(true);
}
if (couchType == CouchType.CArray && source is IEnumerable)
{
return(true);
}
return(couchType == CouchType.CObject && typeof(T).IsClass);
}
public static void Initialize(CouchtypeContext context)
{
context.Database.EnsureCreated();
// Look for any students.
if (context.Students.Any())
{
return; // DB has been seeded
}
var couch = new CouchType[]
{
new Student {
FirstMidName = "Carson", LastName = "Alexander", EnrollmentDate = DateTime.Parse("2005-09-01")
},
new Student {
FirstMidName = "Meredith", LastName = "Alonso", EnrollmentDate = DateTime.Parse("2002-09-01")
},
new Student {
FirstMidName = "Arturo", LastName = "Anand", EnrollmentDate = DateTime.Parse("2003-09-01")
},
new Student {
FirstMidName = "Gytis", LastName = "Barzdukas", EnrollmentDate = DateTime.Parse("2002-09-01")
},
new Student {
FirstMidName = "Yan", LastName = "Li", EnrollmentDate = DateTime.Parse("2002-09-01")
},
new Student {
FirstMidName = "Peggy", LastName = "Justice", EnrollmentDate = DateTime.Parse("2001-09-01")
},
new Student {
FirstMidName = "Laura", LastName = "Norman", EnrollmentDate = DateTime.Parse("2003-09-01")
},
new Student {
FirstMidName = "Nino", LastName = "Olivetto", EnrollmentDate = DateTime.Parse("2005-09-01")
}
};
foreach (Student s in students)
{
context.Students.Add(s);
}
context.SaveChanges();
var courses = new Course[]
{
new Course {
CourseID = 1050, Title = "Chemistry", Credits = 3
},
new Course {
CourseID = 4022, Title = "Microeconomics", Credits = 3
},
new Course {
CourseID = 4041, Title = "Macroeconomics", Credits = 3
},
new Course {
CourseID = 1045, Title = "Calculus", Credits = 4
},
new Course {
CourseID = 3141, Title = "Trigonometry", Credits = 4
},
new Course {
CourseID = 2021, Title = "Composition", Credits = 3
},
new Course {
CourseID = 2042, Title = "Literature", Credits = 4
}
};
foreach (Course c in courses)
{
context.Courses.Add(c);
}
context.SaveChanges();
var enrollments = new Enrollment[]
{
new Enrollment {
StudentID = 1, CourseID = 1050, Grade = Grade.A
},
new Enrollment {
StudentID = 1, CourseID = 4022, Grade = Grade.C
},
new Enrollment {
StudentID = 1, CourseID = 4041, Grade = Grade.B
},
new Enrollment {
StudentID = 2, CourseID = 1045, Grade = Grade.B
},
new Enrollment {
StudentID = 2, CourseID = 3141, Grade = Grade.F
},
new Enrollment {
StudentID = 2, CourseID = 2021, Grade = Grade.F
},
new Enrollment {
StudentID = 3, CourseID = 1050
},
new Enrollment {
StudentID = 4, CourseID = 1050
},
new Enrollment {
StudentID = 4, CourseID = 4022, Grade = Grade.F
},
new Enrollment {
StudentID = 5, CourseID = 4041, Grade = Grade.C
},
new Enrollment {
StudentID = 6, CourseID = 1045
},
new Enrollment {
StudentID = 7, CourseID = 3141, Grade = Grade.A
},
};
foreach (Enrollment e in enrollments)
{
context.Enrollments.Add(e);
}
context.SaveChanges();
}
