Cfrgtkky

public class Report

{

    [Key]

    public int ReportId { get; set; }



    [ForeignKey("Subjects")]

    public int SubjectId { get; set; }

    public Subjects Subjects { get; set; }



    [ForeignKey("Teacher")]

    public int TeacherId { get; set; }

    public Teacher Teacher { get; set; }



   [ForeignKey("MarkType")]

    public int MarkTypeId { get; set; }

    public MarkType MarkType { get; set; }

}



public class Teacher

{

    [Key]

    public int TeacherId { get; set; }



    [MaxLength(50)]

    [Required]

    public string FName { get; set; }



    [MaxLength(50)]

    [Required]

    public string LName { get; set; }



}



public class Student

{

    [Key]

    public int StudentId { get; set; }



    [MaxLength(50)]

    [Required]

    public string FName { get; set; }



    [MaxLength(50)]

    [Required]

    public string LName { get; set; }



    [ForeignKey("Grade")]

    public int GradeId { get; set; }

    public Grade Grade { get; set; }

}



public class Grade

{

    [Key]

    public int GradeId { get; set; }

    public int StudentGrade { get; set; }

}



public class Subjects

{

    [Key]

    public int SubjectId { get; set; }



    [MaxLength(50)]

    [Required]

    public string SubjectName { get; set; }

}



public class Terms

{

    [Key]

    public int TermId { get; set; }



    public int Term { get; set; }

}



public class MarkType

{

    [Key]

    public int MarkTypeId { get; set; }

    [MaxLength(20)]

    [Required]

    public string TypeName { get; set; }



}



public class StudentMark

{

    [Key]

    public int StudentMarkId { get; set; }



    [ForeignKey("Report")]

    public int ReportId { get; set; }

    public Report Report { get; set; }



    [ForeignKey("Student")]

    public int StudentId { get; set; }

    public Student Student { get; set; }



    public int Mark { get; set; }



    [ForeignKey("Terms")]

    public int TermId { get; set; }

    public Terms Terms { get; set; }



}

In the API I am making I want to have the ability to use two different IDs to get a more specific response.

var report = ReportDBContext.StudentMark

            .Include(p => p.Student.Grade).Include(p => p.Report)

            .Include(p => p.Terms).Include(a => a.Report.Subjects).Include(a => a.Terms)

            .Include(a => a.Report.MarkType).Include(a => a.Report.Teacher).ToList();

This allowed me to get StudentMark as well as it's related entities but I want to have the ability to use The student's Id and the Term's Id to get a student's marks for that term and all the subjects related to the student. I am a beginner to Web API so please let me know if I need to add more context.

If you want to query by either StudentId or TermId, I suggest that you provide two different endpoints for these two different queries. Use LINQ Where to check your conditions.

public StudentMark GetMarksByStudentId(int studentId) {

    return ReportDBContext.StudentMark

        /* .Include(...) */

        .Where(mark => mark.StudentId == studentId)

        .ToArray();

}



public StudentMark GetMarksByTermId(int termId) {

    return ReportDBContext.StudentMark

        /* .Include(...) */

        .Where(mark => mark.TermId == termId)

        .ToArray();

}

If you want to query by StudentId and TermId simultaneously, introduce a query object to encapsulate your parameters. You can test for multiple conditions in the Where clause with AND &&.

public StudentMark FindMarks(StudentMarkQuery query) {

     return ReportDBContext.StudentMark

            /* .Include(...) */

            .Where(mark => mark.StudentId == query.StudentId

                        && mark.TermId == query.TermId)

            .ToArray();

}

The StudentMarkQuery class is introduced so you can add additional parameters without changing the overall signature of the endpoint:

public class StudentMarkQuery {

    public int StudentId { get; set; }

    public int TermId { get; set; }

}