我正在尝试通过以下方式执行长 sql 查询：
IEnumerable<erequest> blah = db.Database.SqlQuery<erequest>().ToList();
为方便起见，查询显示在下方。当我执行查询时，我收到以下错误：
数据读取器与指定的“
enrollDBModel.erequest”不兼容。类型的成员“er_student_id”在数据读取器中没有同名的对应列。
但是，er_student_idmeber 确实存在于 erequest.cs Context.tt 类中
public int er_student_id { get; set; }
（完整课程另见帖子底部）
询问：
SELECT erequests.er_id,
CASE
WHEN current_subject_enrollment.count >= subjects.sj_max_enrollment
THEN 0
WHEN already_passed.count >= 1 THEN 0
WHEN is_already_enrolled.count >= 1 THEN 0
WHEN failure_times.count >= 3 THEN 0
WHEN current_student_enrollment.count >= 4 THEN 0
ELSE 1
END AS can_enroll,
students.st_first_name,
students.st_mid_name,
students.st_last_name,
students.st_student_id,
subjects.sj_subject_name,
subjects.sj_availability,
subjects.sj_max_enrollment,
erequests.er_subject_id,
erequests.er_reason,
erequests.er_status
FROM erequests
RIGHT JOIN students
ON erequests.er_student_id = students.st_student_id
RIGHT JOIN subjects
ON erequests.er_subject_id = subjects.sj_subject_id
AND subjects.sj_availability = 1
LEFT OUTER JOIN (SELECT Count(em_student_id) AS count,
em_subject_id
FROM enrollment
WHERE ( em_enrolled = 1 )
GROUP BY em_subject_id) AS current_subject_enrollment
ON erequests.er_subject_id =
current_subject_enrollment.em_subject_id
LEFT OUTER JOIN (SELECT Count(em_student_id) AS count,
em_student_id,
em_subject_id
FROM enrollment
WHERE ( em_enrolled = 1 )
GROUP BY em_student_id,
em_subject_id) AS is_already_enrolled
ON erequests.er_student_id =
is_already_enrolled.em_student_id
AND erequests.er_subject_id =
is_already_enrolled.em_subject_id
LEFT OUTER JOIN (SELECT Count(em_student_id) AS count,
em_student_id,
em_subject_id
FROM enrollment
WHERE ( em_enrolled = 0
AND em_result >= 50 )
GROUP BY em_student_id,
em_subject_id) AS already_passed
ON erequests.er_subject_id = already_passed.em_subject_id
AND erequests.er_subject_id =
already_passed.em_subject_id
LEFT OUTER JOIN (SELECT Count(em_student_id) AS count,
em_student_id,
em_subject_id
FROM enrollment
WHERE ( em_enrolled = 0
AND em_result < 50 )
GROUP BY em_student_id,
em_subject_id) AS failure_times
ON erequests.er_subject_id = failure_times.em_subject_id
AND erequests.er_subject_id = failure_times.em_subject_id
LEFT OUTER JOIN (SELECT Count(em_subject_id) AS count,
em_student_id
FROM enrollment
WHERE ( em_enrolled = 1 )
GROUP BY em_student_id) AS current_student_enrollment
ON erequests.er_student_id =
current_student_enrollment.em_student_id
WHERE ( subjects.sj_availability = 1 )
AND ( erequests.er_status NOT IN ( 'A', 'D' ) )
请求.cs：
public partial class erequest
{
public int er_id { get; set; }
public int can_enroll { get; set; }
[Required]
[Range(1, 100000)]
[Display(Name = "Subject Id: ")]
public int er_subject_id { get; set; }
[Required]
[Range(1, 100000)]
[Display(Name = "Student Id: ")]
public int er_student_id { get; set; }
[Required]
[Display(Name = "Reason: ")]
public string er_reason { get; set; }
[Required]
[Display(Name = "Status: ")]
public string er_status { get; set; }
public virtual student student { get; set; }
public virtual subject subject { get; set; }
public IEnumerable<erequest> processedErequests { get; set; }
public IEnumerable<erequest> unprocessedErequests { get; set; }
}